DR. ANNA G. USOWICZ MD
NPI 1457317554
Pediatrics - Neonatal-Perinatal Medicine in Oakland, CA
About Dr. Anna G. Usowicz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANNA G. USOWICZ MD (NPI 1457317554) is an individual neonatal-perinatal medicine provider in Oakland, California, licensed in California (A36956) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Anna G. Usowicz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
6Medicare enrollment records show Anna Usowicz reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
San Francisco, CA 94108
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: City & County Of San Francisco
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 637 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
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 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.
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.
OAKLAND, CA 94609
OAKLAND, CA 94609
OAKLAND, CA 94609
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 Anna Usowicz's NPI number?
The NPI number for Anna Usowicz is 1457317554. It was assigned to this individual provider in the NPPES registry on April 26, 2006.
Where is Anna Usowicz located?
Anna Usowicz practices at 747 52nd St Neonatology 3rd Floor, Oakland, CA 94609. The listed phone number is (510) 428-3276.
What is Anna Usowicz's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is Anna Usowicz enrolled in Medicare?
Yes. Anna Usowicz is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Anna Usowicz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Anna Usowicz reassigns Medicare benefits to 6 organizations: Sutter Bay Medical Foundation (Orinda, CA), City And Couny Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and 1 more organization, listed in the Medicare section above. 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 Anna Usowicz'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 Anna Usowicz was last updated on April 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Anna G. Usowicz, MD · NPI 1457317554
Neonatal-Perinatal Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since April 26, 2006.
## Identity
- **NPI:** 1457317554 (Entity type: Individual)
- **Enumerated:** April 26, 2006
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** A36956 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 747 52ND ST, NEONATOLOGY 3RD FLOOR, Oakland, CA 94609-1809
- **Phone:** (510) 428-3276 · **Fax:** (510) 450-5823
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA); City And Couny Of San Francisco (NPI 1164613832, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1356696215, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 29, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1457317554) · Data from the CMS NPPES public registry.