Quick answers
- Does Ali A. Karrar accept Medicare assignment?
- Yes. Medicare's clinician data says Ali A. Karrar 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 Ali A. Karrar see?
- In 2024, CMS data shows 279 Original Medicare patients and 12,581 services for Ali A. Karrar. This counts Original Medicare only and measures volume, not quality.
- What is Ali A. Karrar's NPI number?
- 1871520239. 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 Ali A. Karrar, 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 | 279 |
|---|---|
| Services billed to Medicare | 12,581 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)1,962 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)541 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)107 services
- Injection of drug or substance under skin or into muscle (96372)60 services
- Dxa bone density measurement of hip, pelvis, spine (77080)48 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%
- Arthritis75%
- High cholesterol71%
- Diabetes32%
- Anxiety31%
- Chronic kidney disease31%
Hospitals where Ali A. Karrar works
Medicare's Facility Affiliation Data lists Ali A. Karrar 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.
- Covenant Medical CenterSaginaw, MI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 230070
- McLaren Bay RegionBay City, MI · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 230041
- McLaren Lapeer RegionLapeer, MI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 230193
Practice locations
Addresses where Ali A. Karrar is enrolled with Medicare (CMS data updated October 2, 2026).
- 1522 Janes AveSaginaw, MI 48601 (989) 755‑0316
- 193 E Jefferson StFrankenmuth, MI 48734
- 8200 S Saginaw St, Suite 500Grand Blanc, MI 48439 (810) 953‑8700
Group practices
Medicare enrollment lists Ali A. Karrar as a member of these groups (CMS data updated October 2, 2026).
- Rau Physical Therapy Inc96 clinicians in the group
- Great Lakes Bay Health Centers86 clinicians in the group
- Michigan Rheumatology Group PC3 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Saginaw
Clinicians with the same Medicare primary specialty in Saginaw, MI — not a recommendation.
Other clinicians in Rau Physical Therapy Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1980 (46 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1871520239 |
| 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