Felix Litvak
Internal Medicine Physician · San Francisco, CA
Felix Litvak is an internal medicine physician with a practice address in San Francisco, California, and NPI 1629495791, issued on Mar 26, 2014. Check the license (California A145136, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Felix Litvak
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A145136 CA
Self-reported in NPPES; status is on the state search - Practice location
- 850 37TH Ave, San Francisco, CA 94121
- Phone
- (415) 533-2035
- Enumerated
- Mar 26, 2014
- Record last updated
- Oct 14, 2024
- Medicare enrollment
- Enrolled (PECOS I20171109002743); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Felix Litvak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A145136Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,107 Medicare Part D claims for 342 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 29 claims were for opioids.
Most prescribed
- Metoprolol Succinate61 claims
- Atorvastatin Calcium60 claims
- Amlodipine Besylate39 claims
- Pantoprazole Sodium38 claims
- Prednisone38 claims
- Cefpodoxime Proxetil36 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.
Bills Medicare through one group practice
- Permanente Medical Group IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Felix Litvak among 17,696 internal medicine physician records in California
Felix Litvak is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2014 · median 2004 among the 11,065 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 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Jonathan Garber, M.D.San Francisco, CA 941211902834468
- Christina Ghaly, MDSan Francisco, CA 941211427081678
- Sei Lee, MDSan Francisco, CA 941211477513349
- Mei-Lai Lucas, MDSan Francisco, CA 941211104806058
- Maxine Papadakis, MDSan Francisco, CA 941211295768422
Common questions
What is Felix Litvak's NPI number?
Felix Litvak's National Provider Identifier (NPI) is 1629495791, issued on Mar 26, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Felix Litvak located?
The NPPES record lists a practice address at 850 37TH Ave, San Francisco, CA, 94121. Phone: (415) 533-2035. Providers update this record themselves, so call before visiting.
How can I verify Felix Litvak's license?
NPPES lists California license number A145136, 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 Felix Litvak prescribe under Medicare Part D?
In 2024, Felix Litvak had 1,107 Medicare Part D claims for 342 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.