MARGARET MONTGOMERY SPINI MD
NPI 1902471261
Family Medicine in San Francisco, CA
About Margaret Montgomery Spini Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET MONTGOMERY SPINI MD (NPI 1902471261) is an individual family medicine provider in San Francisco, California, licensed in California (A193797) and active in the NPI registry since May 2021. She is enrolled in Medicare PECOS and is a graduate of University Of Maryland School Of Medicine (2021).
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
Margaret Montgomery Spini 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 Margaret Spini 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.
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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Margaret Spini's NPI number?
The NPI number for Margaret Spini is 1902471261. It was assigned to this individual provider in the NPPES registry on May 20, 2021.
Where is Margaret Spini located?
Margaret Spini practices at 520 Illinois St, San Francisco, CA 94158. The listed phone number is (415) 206-6892.
What is Margaret Spini's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Margaret Spini enrolled in Medicare?
Yes. Margaret Spini 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 Margaret Spini's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Spini 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 Margaret Spini'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 Margaret Spini was last updated on July 3, 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.
# Margaret Montgomery Spini, MD · NPI 1902471261
Family Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since May 20, 2021.
## Identity
- **NPI:** 1902471261 (Entity type: Individual)
- **Enumerated:** May 20, 2021
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A193797 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 520 ILLINOIS ST, San Francisco, CA 94158
- **Phone:** (415) 206-6892 · **Fax:** (415) 206-8387
## 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 Maryland School Of Medicine, class of 2021
## Record status
- **NPPES last updated:** July 3, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1902471261) · Data from the CMS NPPES public registry.