Quick answers
- Does Ma'An A. Nasir accept Medicare assignment?
- Yes. Medicare's clinician data says Ma'An A. Nasir 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'An A. Nasir see?
- In 2024, CMS data shows 981 Original Medicare patients and 25,232 services for Ma'An A. Nasir. This counts Original Medicare only and measures volume, not quality.
- What is Ma'An A. Nasir's NPI number?
- 1629177241. 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'An A. Nasir, 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 | 981 |
|---|---|
| Services billed to Medicare | 25,232 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Injection, faricimab-svoa, 0.1 mg (J2777)12,360 services
- Imaging of retina (92134)2,842 services
- Injection, aflibercept, 1 mg (J0178)1,616 services
- Injection, ranibizumab-eqrn (cimerli), biosimilar, 0.1 mg (Q5128)1,563 services
- Established patient complete exam of visual system (92014)1,442 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 pressure73%
- Arthritis47%
- Diabetes29%
- Chronic kidney disease27%
- Ischemic heart disease24%
Practice locations
Addresses where Ma'An A. Nasir is enrolled with Medicare (CMS data updated October 2, 2026).
- 2901 N Ventura Rd, Suite 250Oxnard, CA 93036 (805) 983‑8808
- 525 E Micheltorena St, Suite ASanta Barbara, CA 93103 (805) 963‑1648
Group practices
Medicare enrollment lists Ma'An A. Nasir as a member of this group (CMS data updated October 2, 2026).
- California Retina Consultants12 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Oxnard
Clinicians with the same Medicare primary specialty in Oxnard, CA — not a recommendation.
Other clinicians in California Retina Consultants
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1990 (36 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629177241 |
| 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
- 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