Robert James Tamai
Gastroenterology Physician · West Hills, CA
Robert James Tamai is a gastroenterology physician with a practice address in West Hills, California, and NPI 1538525001, issued on Jan 13, 2016. Check the license (California A164258, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert James Tamai
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A164258 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7345 Medical Center Dr Ste 420, West Hills, CA 91307
- Phone
- (818) 340-8252
- Enumerated
- Jan 13, 2016
- Record last updated
- Aug 29, 2025
- Medicare enrollment
- Enrolled (PECOS I20250801002889); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 7345 Medical Center Dr Ste 420
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Craig Gluckman, MDGastroenterology Physician1881942506
- Lina Hadj Smaine, DOFamily Medicine Physician1144707423
- Danny Issa, MDGastroenterology Physician1750631396
- Laura King, DOFamily Medicine Physician1730665795
- Mona Rezapour, M.D.Gastroenterology Physician1841559580
Verify Robert James Tamai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A164258Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $38.72
1 payment: food and beverage; the largest payer was Conmed Corporation. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert James Tamai among 2,140 gastroenterology physician records in California
Robert James Tamai is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 88% of them.
- NPI issued2016 · 88% of these records are older, 9% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2018 · median 2002 among the 1,538 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 gastroenterology physician records list a practice address in West Hills
They are 11 of the 708 NPPES records with a practice address in West Hills, and 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in West Hills → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Calin Arimie, MDWest Hills, CA 913071831277847
- Ron Chitayat, MDWest Hills, CA 913071912008657
- Craig Gluckman, MDWest Hills, CA 913071881942506
- Paul Gulsrud, MDWest Hills, CA 913071801975966
- Stephen Herr, MDWest Hills, CA 913071326005091
- Danny Issa, MDWest Hills, CA 913071750631396
- Jonathan Matthew, MDWest Hills, CA 913071124085881
- Mona Rezapour, M.D.West Hills, CA 913071841559580
Common questions
What is Robert James Tamai's NPI number?
Robert James Tamai's National Provider Identifier (NPI) is 1538525001, issued on Jan 13, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Robert James Tamai located?
The NPPES record lists a practice address at 7345 Medical Center Dr Ste 420, West Hills, CA, 91307. Phone: (818) 340-8252. Providers update this record themselves, so call before visiting.
How can I verify Robert James Tamai's license?
NPPES lists California license number A164258, 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.