Quick answers
- Does Marilyn F. Rosca accept Medicare assignment?
- Yes. Medicare's clinician data says Marilyn F. Rosca 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 Marilyn F. Rosca see?
- In 2024, CMS data shows 419 Original Medicare patients and 3,177 services for Marilyn F. Rosca. This counts Original Medicare only and measures volume, not quality.
- What is Marilyn F. Rosca's NPI number?
- 1194177188. 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 Marilyn F. Rosca, 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 | 419 |
|---|---|
| Services billed to Medicare | 3,177 |
| Different services or procedures | 3 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)2,663 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)310 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)204 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 pressure75%
- High cholesterol75%
- Diabetes75%
- Chronic kidney disease74%
- Heart failure72%
- Ischemic heart disease55%
Hospitals where Marilyn F. Rosca works
Medicare's Facility Affiliation Data lists Marilyn F. Rosca 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.
- PIH Health Downey HospitalDowney, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050393
- Saint Francis Medical CenterLynwood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050104
- Whittier Hospital Medical CenterWhittier, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050735
Practice locations
Addresses where Marilyn F. Rosca is enrolled with Medicare (CMS data updated October 2, 2026).
- 2353 23rd StEureka, CA 95501 (707) 445‑3261
- 2885 Harris StEureka, CA 95503 (707) 445‑3261
- 3621 Martin Luther King Jr Blvd, Suite 6Lynwood, CA 90262 (310) 537‑1503
Group practices
Medicare enrollment lists Marilyn F. Rosca as a member of these groups (CMS data updated October 2, 2026).
- Altea Medical California PC85 clinicians in the group
- Meher F Tabatabai M D Inc8 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Eureka
Clinicians with the same Medicare primary specialty in Eureka, CA — not a recommendation.
Other clinicians in Altea Medical California PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194177188 |
| 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