Mary C. Marshall
Gastroenterology Physician · Mobile, AL
Mary C. Marshall is a gastroenterology physician with a practice address in Mobile, Alabama, and NPI 1336502822, issued on Apr 1, 2016. Check the license (Alabama MD.36662, as entered in NPPES) on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Mary C. Marshall
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD.36662 AL
36662 AL
Self-reported in NPPES; status is on the state search - Practice location
- 75 S University Blvd Unit 6000, Mobile, AL 36608
- Phone
- (251) 660-5555
- Enumerated
- Apr 1, 2016
- Record last updated
- Jun 17, 2022
- Fax
- (251) 660-5559
- Medicare enrollment
- Enrolled (PECOS I20180810002955); accepts Medicare assignment
- Medical or professional school
- University Of South Alabama College Of Medicine, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 232 in Alabama → Look up another NPI →
Also registered at 75 S University Blvd Unit 6000
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mason Adams, M.D.Gastroenterology Physician1770979882
- Baret Bercier, MDGastroenterology Physician1164819231
- Rajab IdrissGastroenterology Physician1184112856
- Rachel MizellFamily Nurse Practitioner1396339909
- Benjamin Niland, M.D.Gastroenterology Physician1346689163
Verify Mary C. Marshall in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical Examiners
Search for license MD.36662Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average gastroenterology physician in 2024
750 Medicare Part D claims for 171 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Pantoprazole Sodium111 claims
- Omeprazole108 claims
- Famotidine98 claims
- Sod Sulf-Potass Sulf-Mag Sulf70 claims
- Linzess52 claims
- Trulance41 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 96.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $969.78
52 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- USA Health Physician Billing Services LLCMobile, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary C. Marshall among 232 gastroenterology physician records in Alabama
Mary C. Marshall is one of 232 gastroenterology physician records with a practice address in Alabama. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 85% of them.
- NPI issued2016 · 85% of these records are older, 12% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2016 · median 2000 among the 161 with a school on file
- Record last updated2022 · 59% 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 Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Alabama
There are 232 gastroenterology physician records in Alabama.
All 232 in Alabama → Every provider in Mobile → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Mason Adams, M.D.Mobile, AL 366081770979882
- Cody BarnettMobile, AL 366081477642890
- Baret Bercier, MDMobile, AL 366081164819231
- Elliot Borak, MDMobile, AL 366081265430235
- William Case, MDMobile, AL 366081235161498
- Susan Fleet, MDMobile, AL 366081053318030
- Panayiotis Grevenitis, M.D.Mobile, AL 366081073834792
- Latasha Henry, M.D.Mobile, AL 366081326304171
Common questions
What is Mary C. Marshall's NPI number?
Mary C. Marshall's National Provider Identifier (NPI) is 1336502822, issued on Apr 1, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mary C. Marshall located?
The NPPES record lists a practice address at 75 S University Blvd Unit 6000, Mobile, AL, 36608. Phone: (251) 660-5555. Providers update this record themselves, so call before visiting.
How can I verify Mary C. Marshall's license?
NPPES lists Alabama license number MD.36662, as entered by the provider. Search the Alabama Board of Medical Examiners at https://www.albme.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary C. Marshall prescribe under Medicare Part D?
In 2024, Mary C. Marshall had 750 Medicare Part D claims for 171 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Mary C. Marshall's MIPS final score?
The 2023 MIPS final score is 96.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.