GAUTAM TAMMEWAR MD
NPI 1669000220
Psychiatry & Neurology - Neurology in San Francisco, CA
About Gautam Tammewar Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GAUTAM TAMMEWAR MD (NPI 1669000220) is an individual neurology provider in San Francisco, California, licensed in California (A192940) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Baltimore, and is a graduate of University Of Utah School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Gautam Tammewar 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
2Medicare enrollment records show Gautam Tammewar reassigns Medicare billing to 2 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
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94158 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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94158
SAN FRANCISCO, CA 94158
SAN FRANCISCO, CA 94158
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 Gautam Tammewar's NPI number?
The NPI number for Gautam Tammewar is 1669000220. It was assigned to this individual provider in the NPPES registry on March 30, 2020.
Where is Gautam Tammewar located?
Gautam Tammewar practices at 1651 4th St Ste 212, San Francisco, CA 94158. The listed phone number is (415) 353-2273.
What is Gautam Tammewar's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Gautam Tammewar enrolled in Medicare?
Yes. Gautam Tammewar 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 Gautam Tammewar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gautam Tammewar reassigns Medicare benefits to 2 organizations: University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (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 Gautam Tammewar'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 Gautam Tammewar was last updated on October 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Gautam Tammewar, MD · NPI 1669000220
Neurology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 30, 2020.
## Identity
- **NPI:** 1669000220 (Entity type: Individual)
- **Enumerated:** March 30, 2020
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** A192940 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1651 4TH ST STE 212, San Francisco, CA 94158-2324
- **Phone:** (415) 353-2273 · **Fax:** (415) 353-2898
## 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:** 2 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) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Utah School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** October 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1669000220) · Data from the CMS NPPES public registry.