Quick answers
- Does Halim O. Muslu accept Medicare assignment?
- Yes. Medicare's clinician data says Halim O. Muslu 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 Halim O. Muslu see?
- In 2024, CMS data shows 441 Original Medicare patients and 655 services for Halim O. Muslu. This counts Original Medicare only and measures volume, not quality.
- What is Halim O. Muslu's NPI number?
- 1639177710. 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 Halim O. Muslu, 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 | 441 |
|---|---|
| Services billed to Medicare | 655 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)151 services
- Biopsy of large bowel using a flexible endoscope (45380)103 services
- Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)65 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)60 services
- Injection beneath lining of large bowel using a flexible endoscope (45381)46 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 cholesterol75%
- High blood pressure69%
- Arthritis36%
- Diabetes27%
- Anxiety25%
- Chronic kidney disease24%
Hospitals where Halim O. Muslu works
Medicare's Facility Affiliation Data lists Halim O. Muslu 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.
- Mercy Medical CenterSpringfield, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220066
Practice locations
Addresses where Halim O. Muslu is enrolled with Medicare (CMS data updated October 2, 2026).
- 175 Carew StSpringfield, MA 01104
- 233 Carew StSpringfield, MA 01104 (413) 748‑9212
- 271 Carew StSpringfield, MA 01104 (413) 748‑9000
Group practices
Medicare enrollment lists Halim O. Muslu as a member of this group (CMS data updated October 2, 2026).
- Riverbend Medical Group Inc226 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Springfield
Clinicians with the same Medicare primary specialty in Springfield, MA — not a recommendation.
Other clinicians in Riverbend Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639177710 |
| 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