DR. MARIN F XAVIER MD
NPI 1437211372
Internal Medicine - Medical Oncology in San Diego, CA
About Dr. Marin F Xavier Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARIN F XAVIER MD (NPI 1437211372) is an individual medical oncology provider in San Diego, California, licensed in California (A84606) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2002).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
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
Dr. Marin F Xavier 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 Marin Xavier reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 1,598 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 1,437 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.
Areas of Expertise CMS Part B claims 11
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92103 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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
SAN DIEGO, CA 92103
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 Marin Xavier's NPI number?
The NPI number for Marin Xavier is 1437211372. It was assigned to this individual provider in the NPPES registry on December 15, 2006. The provider is also known as Marin J Feldman.
Where is Marin Xavier located?
Marin Xavier practices at 501 Washington St Ste 508, San Diego, CA 92103. The listed phone number is (619) 849-4469.
What is Marin Xavier's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Marin Xavier enrolled in Medicare?
Yes. Marin Xavier 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 Marin Xavier's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marin Xavier reassigns Medicare benefits to 2 organizations: Scripps Health (San Diego, CA) and Emergency And Acute Care Medical Corporation (San Diego, 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 Marin Xavier'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 Marin Xavier was last updated on January 2, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Dr. Marin F Xavier, MD · NPI 1437211372
Medical Oncology physician in San Diego, California. Individual provider, active in the CMS NPPES registry since December 15, 2006.
## Identity
- **NPI:** 1437211372 (Entity type: Individual)
- **Enumerated:** December 15, 2006
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** A84606 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 501 WASHINGTON ST STE 508, San Diego, CA 92103-2238
- **Phone:** (619) 849-4469 · **Fax:** (619) 849-1547
## 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): Scripps Health (NPI 1881636108, San Diego, CA); Emergency And Acute Care Medical Corporation (NPI 1437103942, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2002
## Record status
- **NPPES last updated:** January 2, 2020
---
Source: [NPI Profile](https://npiprofile.com/npi/1437211372) · Data from the CMS NPPES public registry.