Jonathan Nei-Kim Tam, M.D.
Obstetrics & Gynecology Physician · Pasadena, CA
Jonathan Nei-Kim Tam, M.D. is an obstetrics & gynecology physician with a practice address in Pasadena, California, and NPI 1013942952, issued on Jul 11, 2006. Check the license (California G66009, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan Nei-Kim Tam
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G66009 CA
Self-reported in NPPES; status is on the state search - Practice location
- 105 N Hill Ave Ste 203, Pasadena, CA 91106
- Phone
- (626) 449-2800
- Enumerated
- Jul 11, 2006
- Record last updated
- Mar 3, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (626) 795-5145
- Medicaid IDs
- 00G660094 CA
00G660091 CA - Medicare enrollment
- Enrolled (PECOS I20100728001087); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1984
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Verify Jonathan Nei-Kim Tam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G66009Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
74% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
43 Medicare Part D claims for 21 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Progesterone13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $327.74
5 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Obhg California PCPalmdale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Nei-Kim Tam among 5,088 obstetrics & gynecology physician records in California
Jonathan Nei-Kim Tam, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1984 · median 2004 among the 2,700 with a school on file
- Record last updated2020 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Pasadena → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Martha Liao, M.D.Pasadena, CA 911061518161728
- Kathy Walker, M.D. FACOGPasadena, CA 911061861495483
- Alice Yung, MDPasadena, CA 911061851403224
- Alya Ahmad, DOPasadena, CA 911051538796669
- Amanda Barnes, MD/MPHPasadena, CA 911051518480698
- Ashley Benda, D.O.Pasadena, CA 911051295129856
- Kim Bui, M.D.Pasadena, CA 911051164871133
- Emily Chu, MDPasadena, CA 911051053947978
Common questions
What is Jonathan Nei-Kim Tam, M.D.'s NPI number?
Jonathan Nei-Kim Tam, M.D.'s National Provider Identifier (NPI) is 1013942952, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Nei-Kim Tam, M.D. located?
The NPPES record lists a practice address at 105 N Hill Ave Ste 203, Pasadena, CA, 91106. Phone: (626) 449-2800. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Nei-Kim Tam, M.D.'s license?
NPPES lists California license number G66009, 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.
How much does Jonathan Nei-Kim Tam, M.D. prescribe under Medicare Part D?
In 2024, Jonathan Nei-Kim Tam, M.D. had 43 Medicare Part D claims for 21 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
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.