ALLISON CHUNG YAN TAM MD
NPI 1437593415
Pediatrics in San Francisco, CA
About Allison Chung Yan Tam Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLISON CHUNG YAN TAM MD (NPI 1437593415) is an individual pediatrics provider in San Francisco, California, licensed in California (A147106) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS and maintains a secondary practice location in Houston.
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 (PECOS)
Allison Chung Yan Tam Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Allison Tam 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 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 20
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
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 Allison Tam's NPI number?
The NPI number for Allison Tam is 1437593415. It was assigned to this individual provider in the NPPES registry on April 22, 2013.
Where is Allison Tam located?
Allison Tam practices at 550 16th St Fl 4, San Francisco, CA 94158. The listed phone number is (415) 476-5022.
What is Allison Tam's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Allison Tam enrolled in Medicare?
Yes. Allison Tam is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Allison Tam's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allison Tam 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 Allison Tam'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 Allison Tam was last updated on September 20, 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.
# Allison Chung Yan Tam, MD · NPI 1437593415
Pediatrics physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since April 22, 2013.
## Identity
- **NPI:** 1437593415 (Entity type: Individual)
- **Enumerated:** April 22, 2013
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A147106 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 16TH ST FL 4, San Francisco, CA 94158-2545
- **Phone:** (415) 476-5022
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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
## Record status
- **NPPES last updated:** September 20, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1437593415) · Data from the CMS NPPES public registry.