Mark Lemert, M.D.
NPI 1306810478 · Gastroenterology Physician · New York, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Lemert, M.D. is a Gastroenterology Physician provider in New York, NY (NPI 1306810478).
Provider details
- NPI number
- 1306810478
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 236488 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
454 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 | 127 | $101 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 65 | $171 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 50 | $126 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 45 | $105 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 30 | $279 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 76 | 23 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 58 | 56 |
| Sod Picosulf/Mag Ox/Citric Acbrand: Clenpiq | 34 | 33 |
| Balsalazide Disodium | 27 | — |
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 25 | 24 |
| Pantoprazole Sodium | 19 | — |
| Mesalamine | 18 |
Practice location
Mailing address
Additional practice locations (1)
- 4 Glen Cove Dr Ste 10Rockport, ME 04856Phone: (207) 301-5790Fax: (207) 301-5310
Registry dates
- Enumerated
- 2006-02-15
- Last updated
- 2024-02-20
- Certified
- 2024-02-20
Frequently asked questions
- What is Mark Lemert's NPI number?
- Mark Lemert's National Provider Identifier (NPI) is 1306810478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lemert's specialty?
- Mark Lemert is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Lemert located?
- Mark Lemert's practice location on file with NPPES is 317 E 34th St, New York, NY 10016-4974.
- What is Mark Lemert's phone number?
- The practice phone number listed in the NPPES registry for Mark Lemert is (212) 726-7412.
- Does Mark Lemert accept Medicare?
- Mark Lemert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Lemert's NPI active?
- Yes — Mark Lemert's NPI (1306810478) is active in the NPPES registry as of the last update on 2024-02-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.