Marc Bernstein, M.D.
NPI 1336110543 · Gastroenterology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Bernstein, M.D. is a Gastroenterology Physician provider in Saint Louis, MO (NPI 1336110543).
Provider details
- NPI number
- 1336110543
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MO101070 (MO)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
429 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 105 | $123 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 100 | $87 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 43 | $241 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 40 | $54 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 33 | $75 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 156 | 151 |
| Carvedilol | 126 | 40 |
| Omeprazole | 122 | 35 |
| Spironolactone | 117 | 35 |
| Pantoprazole Sodium | 117 | 36 |
| Ursodiol | 102 | 30 |
| Furosemide | 95 | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-01-27
- Last updated
- 2019-04-02
Frequently asked questions
- What is Marc Bernstein's NPI number?
- Marc Bernstein's National Provider Identifier (NPI) is 1336110543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Bernstein's specialty?
- Marc Bernstein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Bernstein located?
- Marc Bernstein's practice location on file with NPPES is 621 S New Ballas Rd Ste 598a, Saint Louis, MO 63141-8262.
- What is Marc Bernstein's phone number?
- The practice phone number listed in the NPPES registry for Marc Bernstein is (314) 251-3380.
- Does Marc Bernstein accept Medicare?
- Marc Bernstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Bernstein's NPI active?
- Yes — Marc Bernstein's NPI (1336110543) is active in the NPPES registry as of the last update on 2019-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.