Marc J. Bernstein, M.D.
Gastroenterology Physician · Saint Louis, MO
Marc J. Bernstein, M.D. is a gastroenterology physician with a practice address in Saint Louis, Missouri, and NPI 1336110543, issued on Jan 27, 2006. Check the license (Missouri MO101070, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Marc J. Bernstein
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MO101070 MO
Self-reported in NPPES; status is on the state search - Practice location
- 621 S New Ballas RD Ste 598A, Saint Louis, MO 63141
- Phone
- (314) 251-3380
- Enumerated
- Jan 27, 2006
- Record last updated
- Apr 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (314) 251-3385
- Medicaid IDs
- 209744317 MO
1336110543 MO - Medicare enrollment
- Enrolled (PECOS I20090629000066); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1992
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 621 S New Ballas RD Ste 598A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sonal Doshi, ACNPAcute Care Nurse Practitioner1972844199
Verify Marc J. Bernstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license MO101070Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% more Medicare Part D claims than the average gastroenterology physician in 2024
1,600 Medicare Part D claims for 470 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Gavilyte-C156 claims
- Carvedilol126 claims
- Omeprazole122 claims
- Pantoprazole Sodium117 claims
- Spironolactone117 claims
- Ursodiol102 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Mercy Clinic Gastroenterology LLCTroy, MO
- Mercy Hospitals East CommunitiesSt Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc J. Bernstein among 414 gastroenterology physician records in Missouri
Marc J. Bernstein, M.D. is one of 414 gastroenterology physician records with a practice address in Missouri. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 47% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1992 · median 2003 among the 303 with a school on file
- Record last updated2019 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Missouri
There are 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Saint Louis → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- John Farrell, M.D.Saint Louis, MO 631411194724724
- Mohammad Tarik Firozi, MDSaint Louis, MO 631411962481648
- David Goran, MDSaint Louis, MO 631411578672648
- Elizabeth Huebner, MDCreve Coeur, MO 631411760592794
- Paul King, M.D.Saint Louis, MO 631411609872704
- Muddasani Reddy, DOSaint Louis, MO 631411013930585
- Rajesh Shah, M.D.Saint Louis, MO 631411912066382
- Aman Singh, MDSaint Louis, MO 631411548237845
Common questions
What is Marc J. Bernstein, M.D.'s NPI number?
Marc J. Bernstein, M.D.'s National Provider Identifier (NPI) is 1336110543, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marc J. Bernstein, M.D. located?
The NPPES record lists a practice address at 621 S New Ballas RD Ste 598A, Saint Louis, MO, 63141. Phone: (314) 251-3380. Providers update this record themselves, so call before visiting.
How can I verify Marc J. Bernstein, M.D.'s license?
NPPES lists Missouri license number MO101070, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Marc J. Bernstein, M.D. prescribe under Medicare Part D?
In 2024, Marc J. Bernstein, M.D. had 1,600 Medicare Part D claims for 470 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.