DR. MARTIN THELIN MD, PHD
NPI 1225562440
Pediatrics - Pediatric Endocrinology in San Francisco, CA
About Dr. Martin Thelin Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARTIN THELIN MD, PHD (NPI 1225562440) is an individual pediatric endocrinology provider in San Francisco, California, licensed in California (A172426) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, maintains a secondary practice location in Oakland, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Martin Thelin Md, Phd 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 Martin Thelin 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
- 1,159 clinicians in this Medicare group
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.
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
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 Martin Thelin's NPI number?
The NPI number for Martin Thelin is 1225562440. It was assigned to this individual provider in the NPPES registry on April 13, 2017.
Where is Martin Thelin located?
Martin Thelin practices at 550 16th St Box 0110, San Francisco, CA 94143. The listed phone number is (415) 476-5001.
What is Martin Thelin's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Endocrinology, with taxonomy code 2080P0205X.
Is Martin Thelin enrolled in Medicare?
Yes. Martin Thelin 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 Martin Thelin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martin Thelin reassigns Medicare benefits to 3 organizations: Ucsf Pediatrics Associates (San Francisco, CA), 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 Martin Thelin'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 Martin Thelin was last updated on February 22, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Martin Thelin, MD, PHD · NPI 1225562440
Pediatric Endocrinology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since April 13, 2017.
## Identity
- **NPI:** 1225562440 (Entity type: Individual)
- **Enumerated:** April 13, 2017
- **Primary specialty:** Pediatrics - Pediatric Endocrinology · taxonomy 2080P0205X
- **State license:** A172426 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 16TH ST, BOX 0110, San Francisco, CA 94143-2549
- **Phone:** (415) 476-5001
## 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): Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); 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:** Other, class of 2012
## Record status
- **NPPES last updated:** February 22, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1225562440) · Data from the CMS NPPES public registry.