DOUGLAS OBRIEN
NPI 1235158239
Physician Assistant in Greenbrae, CA


Quality Rating: 100 out of 100 score

NPI Status: Active since July 19, 2006

Contact Information

250 BON AIR RD
GREENBRAE, CA
ZIP 94904
Phone: (415) 925-7000

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  • Individual
  • Male
  • Physician Assistant
  • PECOS Enrolled
  • Medicare Quality Reporting

About DOUGLAS OBRIEN

This page provides the complete NPI Profile along with additional information for Douglas Obrien, a primary care provider established in Greenbrae, California with a medical specialization in Physician Assistant. The healthcare provider is registered in the NPI registry with number 1235158239 assigned on July 2006. The practitioner's primary taxonomy code is 363A00000X with license number PA13578 (CA). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1235158239
Provider Name
DOUGLAS OBRIEN
Gender
Male
Entity Type
Individual
Location Address
250 BON AIR RD GREENBRAE, CA 94904
Location Phone
(415) 925-7000
Mailing Address
3746 FOOTHILL BLVD # B140 GLENDALE, CA 91214
Mailing Phone
(310) 445-5999
Is Sole Proprietor?
No
Enumeration Date
07-19-2006
Last Update Date
03-03-2021
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A primary care provider (PCP) like Douglas Obrien sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .

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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

Physician Assistant

Taxonomy Code
363A00000X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
PA13578
License State
CA
Taxonomy Description
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Medicare Participation & PECOS Enrollment Status

Douglas Obrien 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

  • 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.

Application of chemical to stop tissue regrowth in wound

This procedure involves applying a special chemical to a wound to prevent unwanted tissue from growing back. It aids in proper healing by ensuring only healthy tissue regrows. It's a common, safe practice in wound care.

This service was performed 70 times for 17 patients

Follow-up nursing facility visit per day, typically 15 minutes

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

This service was performed 724 times for 234 patients

Follow-up nursing facility visit per day, typically 25 minutes

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

This service was performed 256 times for 89 patients

Follow-up nursing facility visit per day, typically 35 minutes

A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.

This service was performed 564 times for 102 patients

Initial nursing facility visit per day, typically 25 minutes

An initial nursing facility visit is a daily check-up to monitor your health status. This service, lasting typically 25 minutes, involves a nurse assessing your overall wellbeing, discussing concerns, and updating your care plan as needed.

This service was performed 34 times for 34 patients

Initial nursing facility visit per day, typically 35 minutes

An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.

This service was performed 144 times for 144 patients

Initial nursing facility visit per day, typically 45 minutes

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

This service was performed 33 times for 33 patients

Removal of bone, 20.0 sq cm or less

The procedure involves the surgical removal of a section of bone, up to 20.0 square cm in size. This may be necessary due to various reasons such as injury, infection, or to treat a disease. The process aims to alleviate pain, enhance mobility, or prevent the spread of disease.

This service was performed 216 times for 45 patients

Removal of bone, each additional 20.0 sq cm or less

This procedure involves the surgical removal of a specified amount of bone, typically due to disease or injury. Each additional 20.0 square cm or less refers to the size of the bone area being removed. It's a precise operation performed by skilled surgeons.

This service was performed 195 times for 16 patients

Removal of muscle and/or tissue, 20.0 sq cm or less

This procedure involves the surgical removal of a specified area (20.0 sq cm or less) of muscle and/or tissue. It's typically done to treat conditions like tumors, infections, or injuries. Local or general anesthesia ensures comfort. Recovery time varies.

This service was performed 711 times for 116 patients

Removal of muscle and/or tissue, each additional 20.0 sq cm or less

This procedure involves the removal of muscle and/or tissue, typically to treat disease or injury. An additional 20.0 square cm or less of tissue may be removed if necessary. The process is performed by a skilled medical professional to ensure your safety and recovery.

This service was performed 258 times for 29 patients

Removal of skin and tissue, 20.0 sq cm or less

This procedure involves the surgical removal of skin and tissue, up to 20.0 square cm in size. It's often performed to treat conditions like skin cancer or to remove moles, warts, and other skin lesions. The area is numbed and the unwanted tissue is carefully cut out.

This service was performed 134 times for 39 patients

Physician Visit Costs

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 94904 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $104.67
  • Minimum New Patient Price $69.07
  • Maximum New Patient Price $202.63
  • Average New Patient Copayment $26.16
  • Minimum New Patient Copayment $17.26
  • Maximum New Patient Copayment $50.65

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $85
  • Minimum Established Patient Price $23.44
  • Maximum Established Patient Price $166.64
  • Average Established Patient Copayment $21.25
  • Minimum Established Patient Copayment $5.86
  • Maximum Established Patient Copayment $41.66

* 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 100, 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: 100 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: N/A

    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: 95

    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: N/A

    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: N/A

    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.

Quality Reporting

The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.

Quality Measure Performance Number of Patients
Advance Care PlanningYesN/A
Implementation of practices/processes to develop advance care planning that includes: documenting the advance care plan or living will within the medical record, educating clinicians about advance care planning motivating them to address advance care planning needs of their patients, and how these needs can translate into quality improvement, educating clinicians on approaches and barriers to talking to patients about end-of-life and palliative care needs and ways to manage its documentation, as well as informing clinicians of the healthcare policy side of advance care planning.
Chronic Care and Preventative Care Management for Empaneled PatientsYesN/A
Proactively manage chronic and preventive care for empaneled patients that could include one or more of the following: • Provide patients annually with an opportunity for development and/or adjustment of an individualized plan of care as appropriate to age and health status, including health risk appraisal; gender, age and condition-specific preventive care services; and plan of care for chronic conditions; • Use condition-specific pathways for care of chronic conditions (e.g., hypertension, diabetes, depression, asthma and heart failure) with evidence-based protocols to guide treatment to target; such as a CDC-recognized diabetes prevention program; • Use pre-visit planning to optimize preventive care and team management of patients with chronic conditions; • Use panel support tools (registry functionality) to identify services due; • Use predictive analytical models to predict risk, onset and progression of chronic diseases; or • Use reminders and outreach (e.g., phone calls, emails, postcards, patient portals and community health workers where available) to alert and educate patients about services due; and/or routine medication reconciliation.
Use of QCDR for feedback reports that incorporate population healthYesN/A
Use of a QCDR to generate regular feedback reports that summarize local practice patterns and treatment outcomes, including for vulnerable populations.
Use of QCDR to support clinical decision makingYesN/A
Participation in a QCDR, demonstrating performance of activities that promote implementation of shared clinical decision making capabilities.

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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.
1235158239
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2265251626
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 2 + 6 + 5 + 2 + 5 + 1 + 6 + 2 + 6 + 24 = 61
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 61 = 99

The NPI number 1235158239 is valid because the calculated check digit 9 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
1780677963MS. JANET PATRICIA MILLER-MELKA RNFA
Individual
Nurse Practitioner250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7525
1144267097 DENNIS STEVEN ORWIG M.D.
Individual
Radiology (Diagnostic Radiology)250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7301
1245271634 BRIAN JOHN SALMEN M.D.
Individual
Radiology (Diagnostic Radiology)250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7301
1386686525 CHAD JAMES GOODMAN M.D.
Individual
Radiology (Diagnostic Radiology)250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7301
1427091016 WILLIAM JAMES DEMARTINI M.D.
Individual
Radiology (Diagnostic Radiology)250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7301
1720016637 T LEROY BENSON M.D.
Individual
Anesthesiology250 BON AIR RD
GREENBRAE, CA 94904
(415) 454-2218
1235163569DR. MICHAEL L. NEJAD M.D.
Individual
Internal Medicine250 BON AIR RD 3RD FLOOR
GREENBRAE, CA 94904
(415) 925-7545
1063430106DR. KERRY LYNN DAVIDSON M.D.
Individual
Internal Medicine250 BON AIR RD 3RD FLOOR
GREENBRAE, CA 94904
(415) 925-7545
1164440848 TAMI LEE GASH-KIM M.D
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1033137831 ARTHUR C COHN M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1124047451DR. JANEEN SMITH M.D.
Individual
Internal Medicine250 BON AIR RD 3RD FLOOR
GREENBRAE, CA 94904
(415) 925-7545
1881612455 CARL R SPITZER M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1992725451DR. SHANNON MONG PSY.D.
Individual
Psychologist (Clinical)250 BON AIR RD
GREENBRAE, CA 94904
(415) 499-3240
1912929290 ROBERT M RINER M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1548282825 ALAN J SPAIN M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1063434348 JEFFREY D WEITZMAN
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1598787871 JOHN J ZECHERLE M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1821010257 JEFFREY W DIETZ M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1861414203 DAVID S DUFFY M.D.
Individual
Emergency Medicine250 BON AIR RD
GREENBRAE, CA 94904
(415) 925-7000
1487677928DR. CAROL GASTON KERR PH.D.
Individual
Psychologist (Clinical)250 BON AIR RD MARIN CMHS
GREENBRAE, CA 94904
(415) 499-3255

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1235158239, enumerated in the NPI registry as an "individual" on July 19, 2006

The provider is located at 250 Bon Air Rd Greenbrae, Ca 94904 and the phone number is (415) 925-7000

The provider's speciality is Physician Assistant with taxonomy code 363A00000X

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: uses technology to exchange and make use of healthcare information.

Medicare beneficiaries should expect a typical cost of $104.67 with an average copayment of $26.16 for new patient appointments. Established patients should expect a typical charge of $85 and an average copayment of 21.25. 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: Application of chemical to stop tissue regrowth in wound, Follow-up nursing facility visit per day, typically 15 minutes, Follow-up nursing facility visit per day, typically 25 minutes, Follow-up nursing facility visit per day, typically 35 minutes, Initial nursing facility visit per day, typically 25 minutes, Initial nursing facility visit per day, typically 35 minutes, Initial nursing facility visit per day, typically 45 minutes, Removal of bone, 20.0 sq cm or less, Removal of bone, each additional 20.0 sq cm or less, Removal of muscle and/or tissue, 20.0 sq cm or less, Removal of muscle and/or tissue, each additional 20.0 sq cm or less and Removal of skin and tissue, 20.0 sq cm or less.

This NPI record was last updated on July 19, 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].
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