Mark H. Nishiki, MD
Anatomic Pathology & Clinical Pathology Physician · Stockton, CA
Mark H. Nishiki, MD is an anatomic pathology & clinical pathology physician with a practice address in Stockton, California, and NPI 1457385890, issued on Jul 10, 2006. Check the license (California G56041, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark H. Nishiki
- Credential
- MD
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- G56041 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1800 N California St, Stockton, CA 95204
- Phone
- (209) 943-2000
- Enumerated
- Jul 10, 2006
- Record last updated
- Apr 3, 2024
- Medicaid ID
- 14573885890 CA
- Medicare enrollment
- Enrolled (PECOS I20081205000639); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 1,554 in California → Look up another NPI →
Also registered at 1800 N California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maureen Abaray, F.N.P.Family Nurse Practitioner1265549349
- Nariman AbediniPediatrics Physician1780260190
- Najiba Afzal, MDStudent in an Organized Health Care Education/Training Program1033978572
- Khaja AhmedPharmacist1982241709
- Nabeel Ahmed, MDStudent in an Organized Health Care Education/Training Program1083552780
- Savannah AibayeStudent in an Organized Health Care Education/Training Program1619508553
Verify Mark H. Nishiki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G56041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Stockton Pathology Medical GroupStockton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark H. Nishiki among 1,554 anatomic pathology & clinical pathology physician records in California
Mark H. Nishiki, MD is one of 1,554 anatomic pathology & clinical pathology physician records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated1980 · median 2003 among the 891 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in California
There are 1,554 anatomic pathology & clinical pathology physician records in California.
All 1,554 in California → Every provider in Stockton → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Andrew Fong, MDStockton, CA 952041679928394
- David Jensen, MDStockton, CA 952041881621175
- Jeffrey McDavit, M.D.Stockton, CA 952041588817662
- Lily Pang, M.D.Stockton, CA 952041962623348
- Thomas Yu, MDStockton, CA 952041518991959
- Beiru Chen, M.D.Stockton, CA 952071669694766
- Robert Lawrence, M.D.Stockton, CA 952071033187158
- Hong Li, MDStockton, CA 952101497742027
Common questions
What is Mark H. Nishiki, MD's NPI number?
Mark H. Nishiki, MD's National Provider Identifier (NPI) is 1457385890, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark H. Nishiki, MD located?
The NPPES record lists a practice address at 1800 N California St, Stockton, CA, 95204. Phone: (209) 943-2000. Providers update this record themselves, so call before visiting.
How can I verify Mark H. Nishiki, MD's license?
NPPES lists California license number G56041, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.