Quick answers
- Does Marin F. Xavier accept Medicare assignment?
- Yes. Medicare's clinician data says Marin F. Xavier accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marin F. Xavier see?
- In 2024, CMS data shows 529 Original Medicare patients and 6,475 services for Marin F. Xavier. This counts Original Medicare only and measures volume, not quality.
- What is Marin F. Xavier's NPI number?
- 1437211372. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marin F. Xavier, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 529 |
|---|---|
| Services billed to Medicare | 6,475 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)943 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)942 services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)430 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)413 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)86 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure68%
- High cholesterol68%
- Arthritis45%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)37%
- Chronic kidney disease29%
- Ischemic heart disease28%
Hospitals where Marin F. Xavier works
Medicare's Facility Affiliation Data lists Marin F. Xavier at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Scripps Green HospitalLa Jolla, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050424
- Scripps Memorial Hospital - EncinitasEncinitas, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050503
- Scripps Memorial Hospital La JollaLa Jolla, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050324
- Scripps Mercy HospitalSan Diego, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050077
Practice locations
Addresses where Marin F. Xavier is enrolled with Medicare (CMS data updated October 2, 2026).
- 501 Washington St, Suite 508San Diego, CA 92103 (619) 849‑4469
Group practices
Medicare enrollment lists Marin F. Xavier as a member of this group (CMS data updated October 2, 2026).
- Scripps Health1,433 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Hematologyalso
- Internal Medicinealso
Other hematologist-oncologists in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Other clinicians in Scripps Health
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437211372 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians