Quick answers
- Does Lewis Genuth accept Medicare assignment?
- Yes. Medicare's clinician data says Lewis Genuth 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 Lewis Genuth see?
- In 2024, CMS data shows 56 Original Medicare patients and 102 services for Lewis Genuth. This counts Original Medicare only and measures volume, not quality.
- What is Lewis Genuth's NPI number?
- 1588605588. 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 Lewis Genuth, 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 | 56 |
|---|---|
| Services billed to Medicare | 102 |
| Different services or procedures | 12 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)40 services
- Biopsy of large bowel using a flexible endoscope (45380)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 pressure70%
- High cholesterol70%
- Diabetes41%
- Arthritis27%
- Chronic kidney disease25%
Practice locations
Addresses where Lewis Genuth is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 Pennsylvania AveBrooklyn, NY 11207 (718) 240‑2000
- 447 Atlantic AveBrooklyn, NY 11217 (718) 858‑6300
Group practices
Medicare enrollment lists Lewis Genuth as a member of this group (CMS data updated October 2, 2026).
- Advantagecare Physicians PC303 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Brooklyn
Clinicians with the same Medicare primary specialty in Brooklyn, NY — not a recommendation.
Other clinicians in Advantagecare Physicians PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588605588 |
| 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
- 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