MARK H NISHIKI MD
NPI 1457385890
Pathology - Anatomic Pathology & Clinical Pathology in Stockton, CA


Quality Rating: 87.7 out of 100 score

NPI Status: Active since July 10, 2006

Contact Information

1800 N CALIFORNIA ST
STOCKTON, CA
ZIP 95204
Phone: (209) 943-2000

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  • Individual
  • Male
  • Years of Experience 46
  • Pathology
  • Anatomic Pathology & Clinical Pathology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MARK NISHIKI

This page provides the complete NPI Profile along with additional information for Mark Nishiki, a provider established in Stockton, California with a medical specialization in Pathology, focusing in anatomic pathology & clinical pathology and more than 46 years of experience. He graduated from University Of Southern California Keck School Of Medicine in 1980. The healthcare provider is registered in the NPI registry with number 1457385890 assigned on July 2006. The practitioner's primary taxonomy code is 207ZP0102X with license number G56041 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1457385890
Provider Name
MARK H NISHIKI MD
Gender
Male
Entity Type
Individual
Location Address
1800 N CALIFORNIA ST STOCKTON, CA 95204
Location Phone
(209) 943-2000
Mailing Address
5700 SOUTHWYCK BLVD TOLEDO, OH 43614
Mailing Phone
(800) 288-8325
Mailing Fax
Medical School Name
UNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduation Year
1980
Is Sole Proprietor?
No
Enumeration Date
07-10-2006
Last Update Date
04-03-2024
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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

Pathology Anatomic Pathology & Clinical Pathology

Taxonomy Code
207ZP0102X
Type
Allopathic & Osteopathic Physicians
License No.
G56041
License State
CA
Taxonomy Description
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

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)
1207ZP0101XAllopathic & Osteopathic Physicians

Pathology
Anatomic Pathology

G56041 (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
G56041OTHER (01)CASTATE LICENCE
14573885890MEDICAID (05)CA 
AY850ZOTHER (01)CACA MEDICARE

Medicare Participation & PECOS Enrollment Status

Mark Nishiki 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.

Mark Nishiki 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: 5890719199

    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: I20081205000639

    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.

Cell examination of specimen, selective cellular enhancement technique

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

This service was performed 12 times for 12 patients

Cell examination of specimen, selective cellular enhancement technique

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

This service was performed 14 times for 13 patients

Evaluation of fine needle aspirate with interpretation and report

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

This service was performed 13 times for 12 patients

Pathology examination of tissue using a microscope, intermediate complexity

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

This service was performed 199 times for 126 patients

Pathology examination of tissue using a microscope, intermediate complexity

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

This service was performed 435 times for 205 patients

Pathology examination of tissue using a microscope, limited examination

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

This service was performed 41 times for 38 patients

Pathology examination of tissue using a microscope, moderately high complexity

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

This service was performed 50 times for 38 patients

Pathology examination of tissue using a microscope, moderately low complexity

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

This service was performed 35 times for 32 patients

Pathology examination of tissue using a microscope, moderately low complexity

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

This service was performed 13 times for 12 patients

Preparation of tissue for examination by removing any calcium present

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

This service was performed 33 times for 31 patients

Special stained specimen slides to examine tissue, initial procedure

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

This service was performed 14 times for 14 patients

Special stained specimen slides to identify organisms including interpretation and report

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

This service was performed 53 times for 34 patients

Special stained specimen slides to identify organisms including interpretation and report

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

This service was performed 64 times for 50 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $33.48 for a new patient copayment and $25.84 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 95204 ZIP code area.

New Patients Visit Costs *

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

  • Average New Patient Price $133.94
  • Minimum New Patient Price $58.87
  • Maximum New Patient Price $176.6
  • Average New Patient Copayment $33.48
  • Minimum New Patient Copayment $14.71
  • Maximum New Patient Copayment $44.15

Established Patients Visit Costs *

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

  • Average Established Patient Price $103.36
  • Minimum Established Patient Price $19.28
  • Maximum Established Patient Price $144.6
  • Average Established Patient Copayment $25.84
  • Minimum Established Patient Copayment $4.82
  • Maximum Established Patient Copayment $36.15

* 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 87.7, 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: 87.7 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: 60.86

    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: N/A

    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.

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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.
1457385890
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
241076810818
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 4 + 1 + 0 + 7 + 6 + 8 + 1 + 0 + 8 + 1 + 8 + 24 = 70
Step 3: because the number obtained in step 2 ends in zero, the check digit is zero.
0

The NPI number 1457385890 is valid because the calculated check digit 0 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
1134120207 CHRISTY WEEKS LOCKE PHARM.D.
Individual
Pharmacist (Pharmacotherapy)1800 N CALIFORNIA ST ST. JOSEPH'S MEDICAL CENTER - PHARMACY DEPT
STOCKTON, CA 95204
(209) 461-5100
1760476683DR. PATRICIA CARLTON PHARM.D.
Individual
Pharmacist1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 461-5100
1750363636 ROSE ELLIS R.PH.
Individual
Pharmacist1800 N CALIFORNIA ST HOME INFUSION PHARMACY
STOCKTON, CA 95204
(209) 461-5486
1639154438 LYNETTE C HART MD
Individual
Specialist1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 467-6330
1447237094DR. WILLIAM POE YEE PHARM.D.
Individual
Pharmacist1800 N CALIFORNIA ST SJMC PHARMACY DEPARTMENT
STOCKTON, CA 95204
(209) 467-6518
1104897362TIMOTHY J SLOAN MD, A PROFESSIONAL CORPORATION
Organization
Thoracic Surgery (Cardiothoracic Vascular Surgery)1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 943-2000
1801849286 SHYH-FANG CHENG M.D.
Individual
Pediatrics (Neonatal-Perinatal Medicine)1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 476-6428
1699715425EMERGENCY PHYSICIANS MEDICAL GROUP, INC
Organization
Emergency Medicine1800 N CALIFORNIA ST
STOCKTON, CA 95204
(330) 493-4443
1245261742 CECELIA R BLAWIE MD
Individual
Internal Medicine1800 N CALIFORNIA ST
STOCKTON, CA 95204
(330) 493-4443
1518991942 DAVID P ENFIELD MD
Individual
Pathology (Anatomic Pathology)1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 473-6555
1114948148 MERCEDES GRAJALES-ZWEIGLE MD
Individual
Surgery1800 N CALIFORNIA ST
STOCKTON, CA 95204
(330) 493-4443
1972517175 MOHAMEDNOOR A OSMAN MD
Individual
Emergency Medicine1800 N CALIFORNIA ST
STOCKTON, CA 95204
(916) 714-4245
1457361099MS. MARISA L TESSADA RD
Individual
Dietitian, Registered1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 467-6356
1770595274 STEVEN R GOLDMAN MD
Individual
Family Medicine1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 461-5489
1770698532MS. MARIA ANTONIA GOMEZ FNP
Individual
Nurse Practitioner (Family)1800 N CALIFORNIA ST ST JOESPH MEDICAL CENTER
STOCKTON, CA 95204
(209) 467-6556
1659487106MRS. MARY L.G. SETNESS NURSE PRACTITIONER
Individual
Nurse Practitioner (Obstetrics & Gynecology)1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 467-6556
1265549349MS. MAUREEN SUSAN ABARAY F.N.P.
Individual
Nurse Practitioner (Family)1800 N CALIFORNIA ST ST. JOSEPH'S CAREVAN SERVICES
STOCKTON, CA 95204
(209) 461-5026
1376655431DR. HENRY YICK TUNG WONG M.D.
Individual
Radiology (Therapeutic Radiology)1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 467-6335
1588794085 SUNDAR NATARAJAN M.D.
Individual
Internal Medicine1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 534-4127
1457476558DELTA RADIOLOGY MEDICAL GROUP, INC.
Organization
Specialist1800 N CALIFORNIA ST
STOCKTON, CA 95204
(209) 943-2000

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1457385890, enumerated in the NPI registry as an "individual" on July 10, 2006

The provider is located at 1800 N California St Stockton, Ca 95204 and the phone number is (209) 943-2000

The provider's speciality is Pathology with taxonomy code 207ZP0102X with a focus in Anatomic Pathology & Clinical Pathology

The provider has more than 46 years of experience. He graduated from University Of Southern California Keck School Of Medicine in 1980.

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.

Medicare beneficiaries should expect a typical cost of $133.94 with an average copayment of $33.48 for new patient appointments. Established patients should expect a typical charge of $103.36 and an average copayment of 25.84. 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: Cell examination of specimen, selective cellular enhancement technique, Cell examination of specimen, selective cellular enhancement technique, Evaluation of fine needle aspirate with interpretation and report, Pathology examination of tissue using a microscope, intermediate complexity, Pathology examination of tissue using a microscope, intermediate complexity, Pathology examination of tissue using a microscope, limited examination, Pathology examination of tissue using a microscope, moderately high complexity, Pathology examination of tissue using a microscope, moderately low complexity, Pathology examination of tissue using a microscope, moderately low complexity, Preparation of tissue for examination by removing any calcium present, Special stained specimen slides to examine tissue, initial procedure, Special stained specimen slides to identify organisms including interpretation and report and Special stained specimen slides to identify organisms including interpretation and report.

This NPI record was last updated on July 10, 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.