Jonathan Tam, MD
Allergy Physician · Los Angeles, CA
Jonathan Tam, MD is an allergy physician with a practice address in Los Angeles, California, and NPI 1619133600, issued on Jul 30, 2008. Check the license (California A125923, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan Tam
- Credential
- MD
- Primary taxonomy
- Allergy Physician 207KA0200X
- License numbers
- A125923 CA
125-052818 IL
54495 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4650 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 361-2501
- Enumerated
- Jul 30, 2008
- Record last updated
- Jun 17, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (323) 361-1191
- Medicare enrollment
- Enrolled (PECOS I20130809000154); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest allergy physician records → All 157 in California → Look up another NPI →
Also registered at 4650 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jonathan Tam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average allergy physician in 2024
12 Medicare Part D claims, against an average of 750 among the 645 providers of this specialty who prescribed in Part D.
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: $3,571.64
6 payments; by number, the most common kind was food and beverage; the largest payer was Csl Behring. The 502 providers of this specialty with any payment received $9,080.33 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
- Childrens Hospital Los Angeles Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jonathan Tam among 157 allergy physician records in California
Jonathan Tam, MD is one of 157 allergy physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 83% of them.
- NPI issued2008 · 83% of these records are older, 11% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2007 · median 1992 among the 82 with a school on file
- Record last updated2015 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207KA0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy Physician providers in California
There are 157 allergy physician records in California.
All 157 in California → Every provider in Los Angeles → Allergy Physician nationwide →
The 8 allergy physician records with the nearest ZIP codes
- Bruce Goldberg, MDLos Angeles, CA 900271699834200
- Michael Kaplan, MDLos Angeles, CA 900271184791063
- Anne Staveren, MDLos Angeles, CA 900271205907110
- Lawrence Mihalas, MDLos Angeles, CA 900251578742318
- Ricardo Tan, MDLos Angeles, CA 900251255353629
- Joseph Dizon, MDLos Angeles, CA 900341750440343
- Renata Lubens, MDLos Angeles, CA 900341043379662
- Marion Johnson, MDLos Angeles, CA 900171952523086
Common questions
What is Jonathan Tam, MD's NPI number?
Jonathan Tam, MD's National Provider Identifier (NPI) is 1619133600, issued on Jul 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan Tam, MD located?
The NPPES record lists a practice address at 4650 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 361-2501. Providers update this record themselves, so call before visiting.
How can I verify Jonathan Tam, MD's license?
NPPES lists California license number A125923, 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 Tam, MD prescribe under Medicare Part D?
In 2024, Jonathan Tam, MD had 12 Medicare Part D claims; the average among allergy physician prescribers was 750. 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.