Jonathon Casey Chapman, MD
Gastroenterology Physician · Baton Rouge, LA
Jonathon Casey Chapman, MD is a gastroenterology physician with a practice address in Baton Rouge, Louisiana, and NPI 1689867434, issued on Aug 24, 2007. Check the license (Louisiana MD 201621, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Jonathon Casey Chapman
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- MD 201621 LA
201621 LA
Self-reported in NPPES; status is on the state search - Practice location
- 9103 Jefferson Hwy, Baton Rouge, LA 70809
- Phone
- (225) 927-1190
- Enumerated
- Aug 24, 2007
- Record last updated
- Nov 9, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (225) 706-0160
- Medicaid ID
- 1500534 LA
- Medicare enrollment
- Enrolled (PECOS I20100908000885); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2006
- Entity
- Type 1 · individual
Also registered at 9103 Jefferson Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Satyaprasad Alapati, M.D.Gastroenterology Physician1679549695
- William Anderson, M.D.Gastroenterology Physician1598730707
- Kathryn Baker, PAMedical Physician Assistant1669753216
- Nicholas BaldwinGastroenterology Physician1013413327
- Michael Barker, MDGastroenterology Physician1750701355
- Robert Be, M.D.Gastroenterology Physician1417923970
Verify Jonathon Casey Chapman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license MD 201621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average gastroenterology physician in 2024
386 Medicare Part D claims for 77 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 67% of claims.
Most prescribed
- Stelara52 claims
- Pantoprazole Sodium50 claims
- Skyrizi On-Body38 claims
- Humira(Cf) Pen30 claims
- Colestipol Hcl27 claims
- Clenpiq23 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): 81.1 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: $152,566.11
307 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.
3 hospitals and group practices
- Baton Rouge General Medical CenterBaton Rouge, LA · Acute Care Hospitals3 of 5 stars
- Lsuhn Billing LLCLafayette, LA
- Texas Digestive Disease Consultants, PLLCThibodaux, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Gastroenterology Physician providers in Louisiana
There are 263 gastroenterology physician records in Louisiana.
Other gastroenterology physician records in Louisiana
- Fiyinfoluwa Abraham, MDNew Orleans, LA1487141636
- Stephen Abshire, MDLafayette, LA1992899470
- Harishwar Agarwal, M.D.Alexandria, LA1649263690
- Humberto Aguilar, M.D.Shreveport, LA1366432577
- Jatinder Ahluwalia, M.D.Lafayette, LA1447249800
- Muhammad Ahmad, M.D.Alexandria, LA1891045183
- Sidra Ahsan, MDShreveport, LA1477073906
- Amit Ahuja, M.D.Alexandria, LA1528061959
- Aderonke Akingbola, M.D.Kenner, LA1033154406
- Irfan AlamLafayette, LA1770501447
Common questions
What is Jonathon Casey Chapman, MD's NPI number?
Jonathon Casey Chapman, MD's National Provider Identifier (NPI) is 1689867434, issued on Aug 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Jonathon Casey Chapman, MD located?
The NPPES record lists a practice address at 9103 Jefferson Hwy, Baton Rouge, LA, 70809. Phone: (225) 927-1190. Providers update this record themselves, so call before visiting.
How can I verify Jonathon Casey Chapman, MD's license?
NPPES lists Louisiana license number MD 201621, as entered by the provider. Search the Louisiana State Board of Medical Examiners at https://www.lsbme.la.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jonathon Casey Chapman, MD prescribe under Medicare Part D?
In 2024, Jonathon Casey Chapman, MD had 386 Medicare Part D claims for 77 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Jonathon Casey Chapman, MD's MIPS final score?
The 2023 MIPS final score is 81.1 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.