William Chastant, MD
Gastroenterology Physician · Lafayette, LA
William Chastant, MD is a gastroenterology physician with a practice address in Lafayette, Louisiana, and NPI 1770087504, issued on Mar 19, 2018. Check the license (Louisiana 327114, as entered in NPPES) on the Louisiana State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Chastant
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 327114 LA
Self-reported in NPPES; status is on the state search - Practice location
- 1211 Coolidge Blvd Ste 303, Lafayette, LA 70503
- Phone
- (372) 326-6973
- Enumerated
- Mar 19, 2018
- Record last updated
- Jul 29, 2024
- Fax
- (337) 500-1358
- Medicare enrollment
- Enrolled (PECOS I20240724001307); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 263 in Louisiana → Look up another NPI →
Also registered at 1211 Coolidge Blvd Ste 303
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Taylor Ball, FNP-CFamily Nurse Practitioner1457122855
- Emily Breaux, FNP-CFamily Nurse Practitioner1811671654
- Jacob Breaux, M.D.Gastroenterology Physician1437416617
- Kent BroussardGastroenterology Physician1477048353
- Makayla Chalacoff, PA-CMedical Physician Assistant1346004561
- Jennifer ForshagFamily Nurse Practitioner1295659852
Verify William Chastant in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersLouisiana State Board of Medical Examiners
Search for license 327114Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average gastroenterology physician in 2024
140 Medicare Part D claims for 74 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Pantoprazole Sodium37 claims
- Sod Sulf-Potass Sulf-Mag Sulf27 claims
- Dicyclomine Hcl12 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.
Industry payments in 2024: $1,073.01
53 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
- Louisiana Gastroenterology Associates LLCLafayette, LA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Chastant among 263 gastroenterology physician records in Louisiana
William Chastant, MD is one of 263 gastroenterology physician records with a practice address in Louisiana. 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 2018, is newer than 90% of them.
- NPI issued2018 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2018 · median 2004 among the 207 with a school on file
- Record last updated2024 · 61% 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 Louisiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Louisiana
There are 263 gastroenterology physician records in Louisiana.
All 263 in Louisiana → Every provider in Lafayette → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Stephen Abshire, MDLafayette, LA 705031992899470
- Jatinder Ahluwalia, M.D.Lafayette, LA 705031447249800
- James Arterburn, MDLafayette, LA 705031538253034
- James Bienvenu, M.D.Lafayette, LA 705031396811402
- Jacob Breaux, M.D.Lafayette, LA 705031437416617
- Richard Broussard, M.D.Lafayette, LA 705031639245798
- James Herrington, M.D.Lafayette, LA 705031386710457
- Christopher Herrington, MDLafayette, LA 705031598932139
Common questions
What is William Chastant, MD's NPI number?
William Chastant, MD's National Provider Identifier (NPI) is 1770087504, issued on Mar 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is William Chastant, MD located?
The NPPES record lists a practice address at 1211 Coolidge Blvd Ste 303, Lafayette, LA, 70503. Phone: (372) 326-6973. Providers update this record themselves, so call before visiting.
How can I verify William Chastant, MD's license?
NPPES lists Louisiana license number 327114, 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 William Chastant, MD prescribe under Medicare Part D?
In 2024, William Chastant, MD had 140 Medicare Part D claims for 74 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.