ANN MARIE PENA MD
NPI 1003033580
Obstetrics & Gynecology in San Diego, CA
About Ann Marie Pena Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANN MARIE PENA MD (NPI 1003033580) is an individual obstetrics & gynecology provider in San Diego, California, licensed in California (A77391) and active in the NPI registry since April 2007. 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)
Ann Marie Pena Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ann Pena reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92120
- Reassigned Medicare billing, California enrollment
- 13,921 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 92120 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 DIEGO, CA 92120
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 Ann Pena's NPI number?
The NPI number for Ann Pena is 1003033580. It was assigned to this individual provider in the NPPES registry on April 19, 2007.
Where is Ann Pena located?
Ann Pena practices at 4647 Zion Ave, San Diego, CA 92120. The listed phone number is (619) 528-5000.
What is Ann Pena's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Ann Pena enrolled in Medicare?
Yes. Ann Pena is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ann Pena's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ann Pena reassigns Medicare benefits to Southern California Permanente Medical Group (San Diego, 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 Ann Pena'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 Ann Pena was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Ann Marie Pena, MD · NPI 1003033580
Obstetrics & Gynecology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since April 19, 2007.
## Identity
- **NPI:** 1003033580 (Entity type: Individual)
- **Enumerated:** April 19, 2007
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A77391 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4647 ZION AVE, San Diego, CA 92120-2507
- **Phone:** (619) 528-5000
## 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:** Southern California Permanente Medical Group (NPI 1225060742, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** December 1, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1003033580) · Data from the CMS NPPES public registry.