Fred Harrison Williams, MD
Gastroenterology Physician · Chesterfield, MO
Fred Harrison Williams, MD is a gastroenterology physician with a practice address in Chesterfield, Missouri, and NPI 1386644326, issued on Jul 29, 2005. Check the license (Missouri 118411, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Fred Harrison Williams
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 118411 MO
Self-reported in NPPES; status is on the state search - Practice location
- 17298 N Outer 40 RD Ste 200, Chesterfield, MO 63005
- Phone
- (314) 529-4900
- Enumerated
- Jul 29, 2005
- Record last updated
- Jul 1, 2026
- Fax
- (314) 434-2679
- Medicare enrollment
- Enrolled (PECOS I20100609000414); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 17298 N Outer 40 RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Siri Ancha, MDGastroenterology Physician1700370863
- Timothy Brotherton, MDGastroenterology Physician1053930586
- Cheri Carmody, RN BC ANPNurse Practitioner1467453134
- Taylor Geisman, MDGastroenterology Physician1932629227
- Christi Huguet, CRNACertified Registered Nurse Anesthetist1033215363
- Sarah KeimFamily Nurse Practitioner1285490847
Verify Fred Harrison Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 118411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average gastroenterology physician in 2024
478 Medicare Part D claims for 193 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Pantoprazole Sodium115 claims
- Famotidine57 claims
- Sod Sulf-Potass Sulf-Mag Sulf36 claims
- Mesalamine35 claims
- Omeprazole30 claims
- Colestipol Hcl28 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: $140.01
2 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. 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
- Gateway Gastroenterology IncChesterfield, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Fred Harrison Williams among 414 gastroenterology physician records in Missouri
Fred Harrison Williams, MD is one of 414 gastroenterology physician records with a practice address in Missouri. 84% 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, 86% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1986 · median 2003 among the 303 with a school on file
- Record last updated2026 · 47% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 gastroenterology physician records list a practice address in Chesterfield
They are 25 of the 2,132 NPPES records with a practice address in Chesterfield, and 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Chesterfield → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Siri Ancha, MDChesterfield, MO 630051700370863
- Timothy Brotherton, MDChesterfield, MO 630051053930586
- Taylor Geisman, MDChesterfield, MO 630051932629227
- Jason Haas, DOChesterfield, MO 630051790948008
- Dustin James, MDChesterfield, MO 630051063538676
- Jeffrey Mathews, MDChesterfield, MO 630051285635656
- Brian McMorrow, MDChesterfield, MO 630051851391890
- Christopher Nguyen, DOChesterfield, MO 630051649833237
Common questions
What is Fred Harrison Williams, MD's NPI number?
Fred Harrison Williams, MD's National Provider Identifier (NPI) is 1386644326, issued on Jul 29, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Fred Harrison Williams, MD located?
The NPPES record lists a practice address at 17298 N Outer 40 RD Ste 200, Chesterfield, MO, 63005. Phone: (314) 529-4900. Providers update this record themselves, so call before visiting.
How can I verify Fred Harrison Williams, MD's license?
NPPES lists Missouri license number 118411, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Fred Harrison Williams, MD prescribe under Medicare Part D?
In 2024, Fred Harrison Williams, MD had 478 Medicare Part D claims for 193 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.