Quick answers
- Does Mahmood El Gasim accept Medicare assignment?
- Yes. Medicare's clinician data says Mahmood El Gasim 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 Mahmood El Gasim see?
- In 2024, CMS data shows 1,130 Original Medicare patients and 82,594 services for Mahmood El Gasim. This counts Original Medicare only and measures volume, not quality.
- What is Mahmood El Gasim's NPI number?
- 1477814739. 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 Mahmood El Gasim, 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 | 1,130 |
|---|---|
| Services billed to Medicare | 82,594 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 79 |
Most frequent services
- Injection, faricimab-svoa, 0.1 mg (J2777)59,880 services
- Injection, avacincaptad pegol, 0.1 mg (J2782)6,400 services
- Injection, ranibizumab-eqrn (cimerli), biosimilar, 0.1 mg (Q5128)4,033 services
- Imaging of retina (92134)3,561 services
- Injection of drug into eye (67028)2,657 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%
- Arthritis48%
- Diabetes37%
- Chronic kidney disease36%
- Ischemic heart disease32%
Practice locations
Addresses where Mahmood El Gasim is enrolled with Medicare (CMS data updated October 2, 2026).
- 4800 N 22nd St, Suite 120Phoenix, AZ 85016 (602) 955‑1000
Group practices
Medicare enrollment lists Mahmood El Gasim as a member of this group (CMS data updated October 2, 2026).
- Barnet Dulaney Perkins Eye Center, PC105 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Phoenix
Clinicians with the same Medicare primary specialty in Phoenix, AZ — not a recommendation.
Other clinicians in Barnet Dulaney Perkins Eye Center, PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Johns Hopkins University School Of Medicine |
| Graduation year | 2012 (14 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477814739 |
| 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