Quick answers
- Does Ma Belen S. Clark accept Medicare assignment?
- Yes. Medicare's clinician data says Ma Belen S. Clark 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 Ma Belen S. Clark see?
- In 2024, CMS data shows 247 Original Medicare patients and 1,132 services for Ma Belen S. Clark. This counts Original Medicare only and measures volume, not quality.
- What is Ma Belen S. Clark's NPI number?
- 1194791178. 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 Ma Belen S. Clark, 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 | 247 |
|---|---|
| Services billed to Medicare | 1,132 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)609 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)168 services
- Administration of influenza virus vaccine (G0008)71 services
- Telephone medical discussion with physician, 21-30 minutes (99443)49 services
- Influenza vaccine, trivalent derived from cell cultures (90661)41 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 cholesterol75%
- High blood pressure74%
- Arthritis51%
- Diabetes27%
- Chronic kidney disease23%
- Ischemic heart disease22%
Hospitals where Ma Belen S. Clark works
Medicare's Facility Affiliation Data lists Ma Belen S. Clark 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.
- Tri-City Medical CenterOceanside, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050128
Practice locations
Addresses where Ma Belen S. Clark is enrolled with Medicare (CMS data updated October 2, 2026).
- 1954 Via Ctr, Suite BVista, CA 92081 (760) 529‑9700
Specialties
- Family Practiceprimary
Other family doctors in Vista
Clinicians with the same Medicare primary specialty in Vista, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194791178 |
| 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