DR. JOHN J FANGMAN MD
NPI 1881645737
Internal Medicine - Infectious Disease in San Francisco, CA
About Dr. John J Fangman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN J FANGMAN MD (NPI 1881645737) is an individual infectious disease provider in San Francisco, California, licensed in California (C206757) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Milwaukee, and is a graduate of University Of Minnesota Medical School (1994).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John J Fangman Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show John Fangman reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 2,112 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Fangman's NPI number?
The NPI number for John Fangman is 1881645737. It was assigned to this individual provider in the NPPES registry on May 15, 2006.
Where is John Fangman located?
John Fangman practices at 400 Parnassus Ave Fl 2, San Francisco, CA 94143. The listed phone number is (415) 476-9362.
What is John Fangman's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is John Fangman enrolled in Medicare?
Yes. John Fangman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Fangman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Fangman reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Regents Of The University Of California (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Fangman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Fangman accept?
Health plans from Taro Health list John Fangman as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for John Fangman was last updated on March 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John J Fangman, MD · NPI 1881645737
Infectious Disease physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since May 15, 2006.
## Identity
- **NPI:** 1881645737 (Entity type: Individual)
- **Enumerated:** May 15, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** C206757 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 PARNASSUS AVE FL 2, San Francisco, CA 94143-2202
- **Phone:** (415) 476-9362
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Regents Of The University Of California (NPI 1376613943, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1994
## Record status
- **NPPES last updated:** March 30, 2026
- **Other identifiers:** Medicaid 31446100 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1881645737) · Data from the CMS NPPES public registry.