ROY MATTATHU JOHN MD
NPI 1417993528
Internal Medicine - Clinical Cardiac Electrophysiology in Stanford, CA


Quality Rating: 78.89 out of 100 score

NPI Status: Active since June 20, 2006

Contact Information

300 PASTEUR DR
STANFORD, CA
ZIP 94305
Phone: (650) 723-4000

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  • Individual
  • Male
  • Years of Experience 47
  • Internal Medicine
  • Clinical Cardiac Electrophysiology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ROY JOHN

This page provides the complete NPI Profile along with additional information for Roy John, an internist established in Stanford, California with a medical specialization in Internal Medicine, focusing in clinical cardiac electrophysiology and more than 47 years of experience. The healthcare provider is registered in the NPI registry with number 1417993528 assigned on June 2006. The practitioner's primary taxonomy code is 207RC0001X with license number C172396 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1417993528
Provider Name
ROY MATTATHU JOHN MD
Gender
Male
Entity Type
Individual
Location Address
300 PASTEUR DR STANFORD, CA 94305
Location Phone
(650) 723-4000
Mailing Address
300 PASTEUR DR STANFORD, CA 94305
Mailing Phone
(650) 723-4000
Medical School Name
OTHER
Graduation Year
1979
Is Sole Proprietor?
No
Enumeration Date
06-20-2006
Last Update Date
04-22-2024
Code Navigator

An internist like Roy John is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine Clinical Cardiac Electrophysiology

Taxonomy Code
207RC0001X
Type
Allopathic & Osteopathic Physicians
License No.
C172396
License State
CA
Taxonomy Description
A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207R00000XAllopathic & Osteopathic Physicians

Internal Medicine

C172396 (CA)
2207RC0000XAllopathic & Osteopathic Physicians

Internal Medicine
Cardiovascular Disease

C172396 (CA)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
Q029370MEDICAID (05)TN 

Medicare Participation & PECOS Enrollment Status

Roy John is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Roy John is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 8628011863

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20211011003137

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation

This is a procedure to treat atrial fibrillation, a condition causing irregular heartbeats. It involves a detailed heart evaluation using electrophysiology. A catheter is then used to destroy the problematic area causing the issue. Specifically, isolation of the pulmonary vein is done to regulate the heartbeat.

This service was performed 21 times for 21 patients

Comprehensive electrophysiologic evaluation with catheter destruction of abnormality of upper chamber of heart causing supraventricular tachycardia (rapid heart rate)

This procedure is a detailed study of your heart's electrical activity. A thin tube (catheter) is inserted into your heart to identify and eliminate the area causing a fast heart rate. This helps restore normal heart rhythm, specifically targeting the upper chamber of the heart.

This service was performed 13 times for 13 patients

Established patient office or other outpatient visit, 30-39 minutes

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

This service was performed 62 times for 51 patients

Established patient office or other outpatient visit, 40-54 minutes

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

This service was performed 78 times for 73 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

This service was performed 21 times for 20 patients

Follow-up hospital inpatient care per day, typically 25 minutes

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

This service was performed 23 times for 16 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

This service was performed 50 times for 50 patients

Initial hospital inpatient care per day, typically 30 minutes

Initial hospital inpatient care refers to the first day of your stay in the hospital. This service typically includes a 30-minute check-up with a healthcare professional. They'll assess your health, discuss your condition, and plan your treatment. It's part of ensuring you receive the best possible care.

This service was performed 18 times for 17 patients

Insertion of catheters and destruction of tissue to treat abnormal heart rhythm

This procedure involves placing small tubes (catheters) into your heart via a blood vessel. These catheters emit energy that corrects irregular heartbeats by eliminating the problematic heart tissue. It's a common, minimally invasive method to treat abnormal heart rhythms.

This service was performed 24 times for 22 patients

Insertion of pacemaker and upper and lower heart chamber electrode

A pacemaker insertion is a procedure where a small device, called a pacemaker, is implanted under your skin. This device uses electrical pulses to prompt the heart to beat at a normal rate. Electrodes are placed in the upper and lower chambers of your heart to help regulate your heartbeat.

This service was performed 19 times for 19 patients

New patient office or other outpatient visit, 30-44 minutes

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

This service was performed 20 times for 20 patients

New patient office or other outpatient visit, 45-59 minutes

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

This service was performed 63 times for 63 patients

Pacemaker insertion or repair

Pacemaker insertion or repair is a procedure to help regulate your heartbeat. A small device, called a pacemaker, is implanted under the skin near your heart. This device sends electrical signals to prompt your heart to beat at a normal rate. In a repair procedure, the pacemaker may be adjusted, replaced, or the wires connecting it to your heart may be fixed.

This service was performed for 46 patients

Programming of dual lead pacemaker system

Programming of a dual lead pacemaker system is a procedure to adjust your heart's pacemaker settings. This process involves a small device, called a programmer, that communicates with your pacemaker to ensure it's working optimally for your heart's needs.

This service was performed 43 times for 37 patients

Programming of multiple lead implantable defibrillator system

Programming of a multiple lead implantable defibrillator system involves adjusting settings on your implanted device to help control irregular heart rhythms. The process is non-invasive and helps ensure optimal device performance for maintaining heart health.

This service was performed 18 times for 13 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

This service was performed 379 times for 316 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $39.16 for a new patient copayment and $30.44 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 94305 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $156.67
  • Minimum New Patient Price $70.37
  • Maximum New Patient Price $206.04
  • Average New Patient Copayment $39.16
  • Minimum New Patient Copayment $17.59
  • Maximum New Patient Copayment $51.51

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $121.77
  • Minimum Established Patient Price $23.96
  • Maximum Established Patient Price $169.6
  • Average Established Patient Copayment $30.44
  • Minimum Established Patient Copayment $5.99
  • Maximum Established Patient Copayment $42.4

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 78.89, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 78.89 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 83.03

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 100

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: 46.6

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: 46.6

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

Reviews for ROY MATTATHU JOHN MD

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1417993528
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2427189654
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 2 + 7 + 1 + 8 + 9 + 6 + 5 + 4 + 24 = 72
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
80 - 72 = 88

The NPI number 1417993528 is valid because the calculated check digit 8 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1891788527DR. PRAVENE A NATH M.D.
Individual
Emergency Medicine300 PASTEUR DR H3200, M/C 5230
PALO ALTO, CA 94305
(650) 721-6408
1659351369DR. DIANA G MC GREGOR MBBS
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 723-6411
1952374936DR. LISA MAI LEE MD
Individual
Obstetrics & Gynecology300 PASTEUR DR
STANFORD, CA 94305
(650) 723-4000
1346215100 JING WANG CHIANG MD
Individual
Obstetrics & Gynecology300 PASTEUR DR
STANFORD, CA 94305
(650) 723-4000
1487617064DR. KEVIN LEE LETZ DNP, NP
Individual
Nurse Practitioner300 PASTEUR DR SUMC - PEDS PHYSICIAN BILLING MC:5530
PALO ALTO, CA 94305
(650) 498-7391
1558328005DR. RHETT W. ATKINSON M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1538126099DR. MICHAEL WARREN CHAMPEAU M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1609834720DR. TERRI HOMER M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1710945837DR. EDWARD R. BAER M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1265490387DR. WILLIAM R. BOHMAN M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1821056904DR. RICHARD JOHN NOVAK M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1619935707DR. LISA DIANNE SAUNDERS M.D.
Individual
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 725-6102
1285683292STANFORD HOSPITAL AND CLINIC
Organization
Anesthesiology300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1932158318STANFORD HOSPITAL AND CLINICS
Organization
Internal Medicine (Endocrinology, Diabetes & Metabolism)300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1538118930STANFORD HOSPITAL AND CLINCS
Organization
Psychiatry & Neurology (Psychiatry)300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1356390751STANFORD HOSPITAL AND CLINICS
Organization
Internal Medicine (Pulmonary Disease)300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1932158334 KRISTIN CLARE JENSEN MD
Individual
Pathology (Anatomic Pathology)300 PASTEUR DR
STANFORD, CA 94305
(650) 498-5710
1932159373STANFORD HOSPITAL AND CLINICS
Organization
Ophthalmology300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1780634121STANFORD HOSPITAL AND CLINICS
Organization
Internal Medicine (Cardiovascular Disease)300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103
1598715930STANFORD HOSPITAL AND CLINIC
Organization
Dermatology300 PASTEUR DR
STANFORD, CA 94305
(650) 498-7103

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1417993528, enumerated in the NPI registry as an "individual" on June 20, 2006

The provider is located at 300 Pasteur Dr Stanford, Ca 94305 and the phone number is (650) 723-4000

The provider's speciality is Internal Medicine with taxonomy code 207RC0001X with a focus in Clinical Cardiac Electrophysiology

The provider has more than 47 years of experience.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

The provider has an overall high rating in the following quality measures: quality clinical practices and patient outcomes and experiences , uses technology to exchange and make use of healthcare information.

Medicare beneficiaries should expect a typical cost of $156.67 with an average copayment of $39.16 for new patient appointments. Established patients should expect a typical charge of $121.77 and an average copayment of 30.44. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation, Comprehensive electrophysiologic evaluation with catheter destruction of abnormality of upper chamber of heart causing supraventricular tachycardia (rapid heart rate), Established patient office or other outpatient visit, 30-39 minutes, Established patient office or other outpatient visit, 40-54 minutes, Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days, Follow-up hospital inpatient care per day, typically 25 minutes, Heart rhythm review and interpretation of continous external ekg over 8-15 days, Initial hospital inpatient care per day, typically 30 minutes, Insertion of catheters and destruction of tissue to treat abnormal heart rhythm, Insertion of pacemaker and upper and lower heart chamber electrode, New patient office or other outpatient visit, 30-44 minutes, New patient office or other outpatient visit, 45-59 minutes, Pacemaker insertion or repair, Programming of dual lead pacemaker system, Programming of multiple lead implantable defibrillator system and Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only.

This NPI record was last updated on June 20, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.