William F. Marsteller, M.D.
Gastroenterology Physician · Charleston, SC
William F. Marsteller, M.D. is a gastroenterology physician with a practice address in Charleston, South Carolina, and NPI 1992917504, issued on May 4, 2007. Check the license (South Carolina 32824, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William F. Marsteller
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 32824 SC
Self-reported in NPPES; status is on the state search - Practice location
- 1962 Charlie Hall Blvd., Charleston, SC 29414
- Phone
- (843) 722-8000
- Enumerated
- May 4, 2007
- Record last updated
- May 7, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (843) 647-6066
- Medicaid ID
- GP0680 SC
- Medicare enrollment
- Enrolled (PECOS I20130606000004); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 2006
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 303 in South Carolina → Look up another NPI →
Also registered at 1962 Charlie Hall Blvd.
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eddie Irions, M.D.Gastroenterology Physician1285885988
- Renee Larsen, P.A.Physician Assistant1740289511
Verify William F. Marsteller in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 32824Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average gastroenterology physician in 2024
2,093 Medicare Part D claims for 599 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
- Pantoprazole Sodium446 claims
- Omeprazole259 claims
- Famotidine213 claims
- Dexlansoprazole Dr84 claims
- Sutab68 claims
- Sucralfate65 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): 82.4 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: $189.39
4 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. 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
- Charleston Gastroenterology SpecialistsCharleston, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William F. Marsteller among 303 gastroenterology physician records in South Carolina
William F. Marsteller, M.D. is one of 303 gastroenterology physician records with a practice address in South Carolina. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 37% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2006 · median 2005 among the 217 with a school on file
- Record last updated2020 · 48% 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 South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in South Carolina
There are 303 gastroenterology physician records in South Carolina.
All 303 in South Carolina → Every provider in Charleston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- William Anderson, MDCharleston, SC 294141164520847
- Jeffrey Basile, MDCharleston, SC 294141437393964
- Theodore Gourdin, MDCharleston, SC 294141821094301
- Neven Hadzijahic, MDCharleston, SC 294141427054915
- Eddie Irions, M.D.Charleston, SC 294141285885988
- Christopher Lawrence, MDCharleston, SC 294141609984566
- John Litchfield, DOCharleston, SC 294141730329533
- Marc Noble, MDCharleston, SC 294141619930807
Common questions
What is William F. Marsteller, M.D.'s NPI number?
William F. Marsteller, M.D.'s National Provider Identifier (NPI) is 1992917504, issued on May 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William F. Marsteller, M.D. located?
The NPPES record lists a practice address at 1962 Charlie Hall Blvd., Charleston, SC, 29414. Phone: (843) 722-8000. Providers update this record themselves, so call before visiting.
How can I verify William F. Marsteller, M.D.'s license?
NPPES lists South Carolina license number 32824, as entered by the provider. Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William F. Marsteller, M.D. prescribe under Medicare Part D?
In 2024, William F. Marsteller, M.D. had 2,093 Medicare Part D claims for 599 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is William F. Marsteller, M.D.'s MIPS final score?
The 2023 MIPS final score is 82.4 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.