DR. NATHAN A FAVINI M.D.
NPI 1124381645
Internal Medicine in San Francisco, CA
About Dr. Nathan A Favini M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHAN A FAVINI M.D. (NPI 1124381645) is an individual internal medicine provider in San Francisco, California, licensed in California (A135758) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS and is a graduate of Harvey Medical College (2012).
NPPES Registry Identity
Specialties & Licenses
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. Nathan A Favini M.d. 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 Nathan Favini 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 94103
- Reassigned Medicare billing, California enrollment
- 28 clinicians in this Medicare group
San Francisco, CA 94103
- Reassigned Medicare billing, California and Texas enrollments
- Medicare enrollment name: Pair Team Medical Group PA
- 28 clinicians in this Medicare group
Alameda, CA 94501
- Reassigned Medicare billing, California enrollment
- 900 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 94104 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94104
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 Nathan Favini's NPI number?
The NPI number for Nathan Favini is 1124381645. It was assigned to this individual provider in the NPPES registry on June 19, 2012.
Where is Nathan Favini located?
Nathan Favini practices at 180 Sutter St, San Francisco, CA 94104. The listed phone number is (415) 349-0850.
What is Nathan Favini's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Nathan Favini enrolled in Medicare?
Yes. Nathan Favini 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 Nathan Favini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Favini reassigns Medicare benefits to 3 organizations: Pair Team Medical Group Of California PC (San Francisco, CA), Pair Team Medical Group, P.A. (San Francisco, CA) and Alameda Health System (Alameda, 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 Nathan Favini's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Nathan Favini was last updated on June 6, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years 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. Nathan A Favini, M.D. · NPI 1124381645
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since June 19, 2012.
## Identity
- **NPI:** 1124381645 (Entity type: Individual)
- **Enumerated:** June 19, 2012
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A135758 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 180 SUTTER ST, San Francisco, CA 94104
- **Phone:** (415) 349-0850
## 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): Pair Team Medical Group Of California PC (NPI 1134838352, San Francisco, CA); Pair Team Medical Group, P.A. (NPI 1659132553, San Francisco, CA); Alameda Health System (NPI 1124446158, Alameda, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvey Medical College, class of 2012
## Record status
- **NPPES last updated:** June 6, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1124381645) · Data from the CMS NPPES public registry.