William Greg Thaggard, M.D.
Gastroenterology Physician · Meridian, MS
William Greg Thaggard, M.D. is a gastroenterology physician with a practice address in Meridian, Mississippi, and NPI 1114923547, issued on Jun 21, 2005. Check the license (Mississippi 12547, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- William Greg Thaggard
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 12547 MS
Self-reported in NPPES; status is on the state search - Practice location
- 2024 15TH St FL 2, Meridian, MS 39301
- Phone
- (601) 553-2000
- Enumerated
- Jun 21, 2005
- Record last updated
- Oct 17, 2024
- Fax
- (601) 553-6746
- Medicaid ID
- 00123654 MS
- Medicare enrollment
- Enrolled (PECOS I20061003000229); accepts Medicare assignment
- Medical or professional school
- University Of Mississippi School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 128 in Mississippi → Look up another NPI →
Also registered at 2024 15TH St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Boyd, M.D.Cardiovascular Disease Physician1730155946
Verify William Greg Thaggard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
Search for license 12547Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% more Medicare Part D claims than the average gastroenterology physician in 2024
1,200 Medicare Part D claims for 251 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Pantoprazole Sodium322 claims
- Omeprazole178 claims
- Colestipol Hcl77 claims
- Linzess46 claims
- Famotidine41 claims
- Lansoprazole40 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: $320.78
10 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 2 group practices
- Anderson Physician Alliance IncMeridian, MS
- Medical Foundation IncMeridian, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Greg Thaggard among 128 gastroenterology physician records in Mississippi
William Greg Thaggard, M.D. is one of 128 gastroenterology physician records with a practice address in Mississippi. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 75% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated1989 · median 1998 among the 102 with a school on file
- Record last updated2024 · 49% 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 Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Mississippi
There are 128 gastroenterology physician records in Mississippi.
All 128 in Mississippi → Every provider in Meridian → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Joel Callahan, M.D.Meridian, MS 393011699752246
- Thomas Calvit, MDMeridian, MS 393011427031731
- Thomas Crowson, M.D.Meridian, MS 393011912129826
- Vincent Dungan, M.D.Meridian, MS 393011134102296
- Adam Parker, M.D.Meridian, MS 393011053724179
- Niraj Shah, M.DMeridian, MS 393011235495474
- Eddie Starnes, M.D.Meridian, MS 393011770550295
- Anthony Thomas, M.D.Meridian, MS 393011639156235
Common questions
What is William Greg Thaggard, M.D.'s NPI number?
William Greg Thaggard, M.D.'s National Provider Identifier (NPI) is 1114923547, issued on Jun 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Greg Thaggard, M.D. located?
The NPPES record lists a practice address at 2024 15TH St FL 2, Meridian, MS, 39301. Phone: (601) 553-2000. Providers update this record themselves, so call before visiting.
How can I verify William Greg Thaggard, M.D.'s license?
NPPES lists Mississippi license number 12547, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Greg Thaggard, M.D. prescribe under Medicare Part D?
In 2024, William Greg Thaggard, M.D. had 1,200 Medicare Part D claims for 251 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.