Quick answers
- Does Zainab Muhanna accept Medicare assignment?
- Yes. Medicare's clinician data says Zainab Muhanna 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 Zainab Muhanna see?
- In 2024, CMS data shows 734 Original Medicare patients and 1,254 services for Zainab Muhanna. This counts Original Medicare only and measures volume, not quality.
- What is Zainab Muhanna's NPI number?
- 1881221596. 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 Zainab Muhanna, 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 | 734 |
|---|---|
| Services billed to Medicare | 1,254 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)363 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)185 services
- Imaging of optic nerve (92133)121 services
- Exam of visual field with extended testing (92083)103 services
- Imaging of retina (92134)94 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%
- Arthritis47%
- Ischemic heart disease38%
- Diabetes34%
- Chronic kidney disease26%
Practice locations
Addresses where Zainab Muhanna is enrolled with Medicare (CMS data updated October 2, 2026).
- 6445 Main St, Suite 2500Houston, TX 77030 (713) 441‑3150
- 6560 Fannin St, Suite 450Houston, TX 77030 (713) 441‑8843
Group practices
Medicare enrollment lists Zainab Muhanna as a member of these groups (CMS data updated October 2, 2026).
- TMH Physician Associates PLLC1,690 clinicians in the group
- Houston Methodist Specialty Physicians1,528 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Other clinicians in TMH Physician Associates PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 2019 (7 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881221596 |
| 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