Quick answers
- Does Muhammad M. Gillan accept Medicare assignment?
- Yes. Medicare's clinician data says Muhammad M. Gillan 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 Muhammad M. Gillan see?
- In 2024, CMS data shows 393 Original Medicare patients and 55,795 services for Muhammad M. Gillan. This counts Original Medicare only and measures volume, not quality.
- What is Muhammad M. Gillan's NPI number?
- 1114918869. 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 Muhammad M. Gillan, 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 | 393 |
|---|---|
| Services billed to Medicare | 55,795 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered) (J0129)12,550 services
- Injection, methylprednisolone acetate, 1 mg (J1010)6,121 services
- Injection, denosumab, 1 mg (J0897)2,040 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)917 services
- X-ray of foot, minimum of 3 views (73630)356 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%
- Arthritis73%
- Ischemic heart disease45%
- Diabetes42%
- Chronic kidney disease38%
Hospitals where Muhammad M. Gillan works
Medicare's Facility Affiliation Data lists Muhammad M. Gillan 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.
- SSM Health St Anthony Hospital - MidwestMidwest City, OK · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 370094
- SSM Health St Anthony Hospital - Oklahoma CityOklahoma City, OK · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 370037
- SSM Health St Anthony Hospital - ShawneeShawnee, OK · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 370149
Practice locations
Addresses where Muhammad M. Gillan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1211 N Shartel Ave, Suite 700Oklahoma City, OK 73103 (405) 410‑8749
- 4220 N Classen Blvd, Suite DOklahoma City, OK 73118 (405) 259‑2333
Group practices
Medicare enrollment lists Muhammad M. Gillan as a member of these groups (CMS data updated October 2, 2026).
- Transitional Care Organization LLC11 clinicians in the group
- Christine E Codding MD PC2 clinicians in the group
Specialties
- Internal Medicineprimary
- Rheumatologyalso
Other internal medicine doctors in Oklahoma City
Clinicians with the same Medicare primary specialty in Oklahoma City, OK — not a recommendation.
Other clinicians in Transitional Care Organization LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114918869 |
| 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