Quick answers
- Does Nathan J. Landesman accept Medicare assignment?
- Yes. Medicare's clinician data says Nathan J. Landesman 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 Nathan J. Landesman see?
- In 2024, CMS data shows 364 Original Medicare patients and 571 services for Nathan J. Landesman. This counts Original Medicare only and measures volume, not quality.
- What is Nathan J. Landesman's NPI number?
- 1457397143. 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 Nathan J. Landesman, 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 | 364 |
|---|---|
| Services billed to Medicare | 571 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)86 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)72 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)71 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)70 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)65 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%
- Arthritis43%
- Diabetes37%
- Ischemic heart disease35%
- Anxiety33%
Hospitals where Nathan J. Landesman works
Medicare's Facility Affiliation Data lists Nathan J. Landesman 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.
- Ascension Genesys HospitalGrand Blanc, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230197
- Beaumont Hospital, TroyTroy, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230269
Practice locations
Addresses where Nathan J. Landesman is enrolled with Medicare (CMS data updated October 2, 2026).
- 420 S Saginaw StFlint, MI 48502 (810) 232‑3522
- 8275 Holly Rd, Suite 2Grand Blanc, MI 48439 (810) 603‑8400
Group practices
Medicare enrollment lists Nathan J. Landesman as a member of these groups (CMS data updated October 2, 2026).
- Henry Ford Health Genesys Hospital84 clinicians in the group
- Flint Gastroenterology Associates PC11 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Flint
Clinicians with the same Medicare primary specialty in Flint, MI — not a recommendation.
Other clinicians in Henry Ford Health Genesys Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457397143 |
| 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