Quick answers
- Does Mohammed I. Al Hamati accept Medicare assignment?
- Yes. Medicare's clinician data says Mohammed I. Al Hamati 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 Mohammed I. Al Hamati see?
- In 2024, CMS data shows 294 Original Medicare patients and 751 services for Mohammed I. Al Hamati. This counts Original Medicare only and measures volume, not quality.
- What is Mohammed I. Al Hamati's NPI number?
- 1851779920. 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 Mohammed I. Al Hamati, 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 | 294 |
|---|---|
| Services billed to Medicare | 751 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)392 services
- Hospital discharge day management, more than 30 minutes (99239)152 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)145 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)22 services
- Hospital discharge day management, 30 minutes or less (99238)12 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%
- Arthritis65%
- Chronic kidney disease62%
- Ischemic heart disease60%
- Heart failure58%
Hospitals where Mohammed I. Al Hamati works
Medicare's Facility Affiliation Data lists Mohammed I. Al Hamati 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.
- HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140187
- St Josephs HospitalBreese, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140145
Practice locations
Addresses where Mohammed I. Al Hamati is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Saint Elizabeth BlvdO Fallon, IL 62269 (618) 234‑2120
Group practices
Medicare enrollment lists Mohammed I. Al Hamati as a member of this group (CMS data updated October 2, 2026).
- Cep America-Illinois Hospitalists, LLP196 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in O Fallon
Clinicians with the same Medicare primary specialty in O Fallon, IL — not a recommendation.
Other clinicians in Cep America-Illinois Hospitalists, LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2015 (11 years since medical school) |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851779920 |
| 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