John J. Fangman, MD
Infectious Disease Physician · San Francisco, CA
John J. Fangman, MD is an infectious disease physician with a practice address in San Francisco, California, and NPI 1881645737, issued on May 15, 2006. Check the license (California C206757, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John J. Fangman
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- C206757 CA
48629 WI
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave FL 2, San Francisco, CA 94143
- Phone
- (415) 476-9362
- Enumerated
- May 15, 2006
- Record last updated
- Mar 30, 2026
- Medicaid ID
- 31446100 WI
- Medicare enrollment
- Enrolled (PECOS I20220124001962); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1994
- Entity
- Type 1 · individual
Also registered at 400 Parnassus Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel BystritskyInfectious Disease Physician1194081984
- Kelli CochranNurse Practitioner1093307878
- Gerd Cropp, M.D.Pediatric Pulmonology Physician1851497960
- Natalie Fong, NPAcute Care Nurse Practitioner1881317451
- Patricia Freeman, PASurgical Physician Assistant1396751764
- Jeffrey Harris, M.D.Pediatrics Physician1023128592
Verify John J. Fangman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C206757Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average infectious disease physician in 2024
112 Medicare Part D claims for 23 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 64% of claims.
Most prescribed
- Biktarvy24 claims
- Cabenuva19 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
- Mass General Brigham Community Physicians IncLawrence, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
Other infectious disease physician records in California
- Sanaz Abderrahmane, M.D.Sacramento, CA1902039902
- Shira Abeles, M.D.San Diego, CA1720240625
- Igor Abolnik, MDRureka, CA1194783829
- Firas Abubaker, MDCorona, CA1346255254
- Nehkonti Adams, M.D.San Diego, CA1194985705
- Paul Adamson, MD, MPHLos Angeles, CA1639558455
- Alina Adeel, M.DLa Jolla, CA1831453596
- Oladunni Adeyiga, MDLos Angeles, CA1801809751
- Jacqueline Adler, M.D.West Hills, CA1326094582
- Dipti Agrawal, MDPalo Alto, CA1437137189
Common questions
What is John J. Fangman, MD's NPI number?
John J. Fangman, MD's National Provider Identifier (NPI) is 1881645737, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John J. Fangman, MD located?
The NPPES record lists a practice address at 400 Parnassus Ave FL 2, San Francisco, CA, 94143. Phone: (415) 476-9362. Providers update this record themselves, so call before visiting.
How can I verify John J. Fangman, MD's license?
NPPES lists California license number C206757, 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 John J. Fangman, MD prescribe under Medicare Part D?
In 2024, John J. Fangman, MD had 112 Medicare Part D claims for 23 beneficiaries; the average among infectious disease physician prescribers was 689. 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.