MRS. PHYLLIS DAWN OSTER M.D.
NPI 1902817919
Obstetrics & Gynecology in Long Beach, CA
About Mrs. Phyllis Dawn Oster M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. PHYLLIS DAWN OSTER M.D. (NPI 1902817919) is an individual obstetrics & gynecology provider in Long Beach, California, licensed in California (G048104) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.
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 (PECOS)
Mrs. Phyllis Dawn Oster M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Phyllis Oster reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Fountain Valley, CA 92708
- Reassigned Medicare billing, California enrollment
- 948 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 90808 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.
LONG BEACH, CA 90808
LONG BEACH, CA 90808
LONG BEACH, CA 90808
LONG BEACH, CA 90808
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 Phyllis Oster's NPI number?
The NPI number for Phyllis Oster is 1902817919. It was assigned to this individual provider in the NPPES registry on August 11, 2006.
Where is Phyllis Oster located?
Phyllis Oster practices at 3828 Schaufele Ave Suite 200, Long Beach, CA 90808. The listed phone number is (657) 241-8990.
What is Phyllis Oster's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Phyllis Oster enrolled in Medicare?
Yes. Phyllis Oster is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Phyllis Oster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Phyllis Oster reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, CA). The 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 Phyllis Oster'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 Phyllis Oster was last updated on October 6, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Mrs. Phyllis Dawn Oster, M.D. · NPI 1902817919
Obstetrics & Gynecology physician in Long Beach, California. Individual provider, active in the CMS NPPES registry since August 11, 2006.
## Identity
- **NPI:** 1902817919 (Entity type: Individual)
- **Enumerated:** August 11, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** G048104 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3828 SCHAUFELE AVE, SUITE 200, Long Beach, CA 90808-1791
- **Phone:** (657) 241-8990
## 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:** Memorialcare Medical Foundation (NPI 1205167350, Fountain Valley, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 6, 2016
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Source: [NPI Profile](https://npiprofile.com/npi/1902817919) · Data from the CMS NPPES public registry.