John L. Tatman, MD
Gynecologic Oncology Physician · Santa Clara, CA
John L. Tatman, MD is a gynecologic oncology physician with a practice address in Santa Clara, California, and NPI 1184701021, issued on Oct 31, 2006. Check the license (California G63598, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John L. Tatman
- Credential
- MD
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License number
- G63598 CA
Self-reported in NPPES; status is on the state search - Practice location
- 710 Lawrence Expy, Santa Clara, CA 95051
- Phone
- (408) 851-1000
- Enumerated
- Oct 31, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00G635980 CA
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 176 in California → Look up another NPI →
Also registered at 710 Lawrence Expy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Iype Abraham, M.D.Internal Medicine Physician1578737243
- Oren Abramson, MDPediatric Gastroenterology Physician1265511307
- Jamie Adiarte, PA-CPhysician Assistant1073824413
- Sarah Adut, PHDClinical Psychologist1609484831
- Najla Ahmadzia, M.D.Student in an Organized Health Care Education/Training Program1568692580
- Farhana Ahmed, MDHospitalist Physician1215110002
Verify John L. Tatman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G63598Check 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: $82.57
2 payments; by number, the most common kind was food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 1,199 providers of this specialty with any payment received $6,387.20 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.
John L. Tatman among 176 gynecologic oncology physician records in California
John L. Tatman, MD is one of 176 gynecologic oncology physician records with a practice address in California. 86% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2007 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in California
There are 176 gynecologic oncology physician records in California.
All 176 in California → Every provider in Santa Clara → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Daniel Kato, MDSanta Clara, CA 950511851478788
- Samuel Ballon, M.D.Los Gatos, CA 950321760408173
- James Lilja, M.D.Campbell, CA 950081225081441
- Tiffany Sia, M.D.Campbell, CA 950081760915912
- Karen Levy, M.D.San Jose, CA 951281467865386
- Giuseppe Ciaravino, MDOakland, CA 946111992883771
- Thomas Ewing, MDOakland, CA 946111376621177
- Liz Han, MDOakland, CA 946111699721498
Common questions
What is John L. Tatman, MD's NPI number?
John L. Tatman, MD's National Provider Identifier (NPI) is 1184701021, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John L. Tatman, MD located?
The NPPES record lists a practice address at 710 Lawrence Expy, Santa Clara, CA, 95051. Phone: (408) 851-1000. Providers update this record themselves, so call before visiting.
How can I verify John L. Tatman, MD's license?
NPPES lists California license number G63598, 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.