Lewis Genuth, MD
NPI 1588605588 · Gastroenterology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lewis Genuth, MD is a Gastroenterology Physician provider in Brooklyn, NY (NPI 1588605588).
Provider details
- NPI number
- 1588605588
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 1652232 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
52 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 40 | $104 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 12 | $406 |
Typical Medicare-allowed amounts for these services range $104–$406 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 46 | 25 |
| Famotidine | 43 | 23 |
| Pantoprazole Sodium | 40 | 21 |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 31 | 31 |
| Mesalamine | 28 | — |
| Hydrocortisone | 20 | 11 |
| Linaclotidebrand: Linzess | 14 | — |
Practice location
Mailing address
Additional practice locations (2)
- 101 Pennsylvania AvenueBrooklyn, NY 11207-2428Phone: (718) 240-2000Fax: (718) 240-2260
- 260 W. Sunrise HwySte. 200Valley Stream, NY 11581-1015Phone: (516) 825-3600Fax: (516) 872-5137
Registry dates
- Enumerated
- 2006-06-09
- Last updated
- 2025-10-20
- Certified
- 2025-10-20
Frequently asked questions
- What is Lewis Genuth's NPI number?
- Lewis Genuth's National Provider Identifier (NPI) is 1588605588, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lewis Genuth's specialty?
- Lewis Genuth is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Lewis Genuth located?
- Lewis Genuth's practice location on file with NPPES is 447 Atlantic Ave, Brooklyn, NY 11217.
- What is Lewis Genuth's phone number?
- The practice phone number listed in the NPPES registry for Lewis Genuth is (718) 858-6300.
- Does Lewis Genuth accept Medicare?
- Lewis Genuth is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lewis Genuth's NPI active?
- Yes — Lewis Genuth's NPI (1588605588) is active in the NPPES registry as of the last update on 2025-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.