David John Westrich, MD
Gastroenterology Physician · Saint Charles, MO
David John Westrich, MD is a gastroenterology physician with a practice address in Saint Charles, Missouri, and NPI 1679927230, issued on Apr 20, 2016. Check the license (Missouri 2025021152, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- David John Westrich
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 2025021152 MO
35145213 OH
Self-reported in NPPES; status is on the state search - Practice location
- 400 1St Capitol Dr Ste 201, Saint Charles, MO 63301
- Phone
- (636) 669-2332
- Enumerated
- Apr 20, 2016
- Record last updated
- Jul 25, 2025
- Medicaid ID
- 0493806 OH
- Medicare enrollment
- Enrolled (PECOS I20250709003535); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 400 1St Capitol Dr Ste 201
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Igor Brondz, M.D.Obstetrics & Gynecology Physician1750341152
- Hari Diwakaran, M.D.Gastroenterology Physician1285694703
- Jennifer Laplante, MD, PHDTrauma Surgery Physician1316262793
- Viktoria Meier, AGNPNurse Practitioner1629552138
- Samuel Rheinhardt, M.D.Surgery Physician1174903488
- Lawrence Tierney, M.D.Gastroenterology Physician1053440222
Verify David John Westrich 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 2025021152Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% fewer Medicare Part D claims than the average gastroenterology physician in 2024
560 Medicare Part D claims for 129 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Omeprazole129 claims
- Linzess49 claims
- Pantoprazole Sodium41 claims
- Motegrity40 claims
- Ondansetron Odt31 claims
- Famotidine27 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 MIPS final score for 2023 (Medicare payment program): 95.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Ssm Medical Group IncSaint Charles, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David John Westrich among 414 gastroenterology physician records in Missouri
David John Westrich, 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 2016, is newer than 84% of them.
- NPI issued2016 · 84% of these records are older, 12% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2016 · median 2003 among the 303 with a school on file
- Record last updated2025 · 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).
Gastroenterology Physician providers in Missouri
There are 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Saint Charles → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Martin Altman, M.D.Saint Charles, MO 633011437110491
- Hari Diwakaran, M.D.Saint Charles, MO 633011285694703
- Marin Marcu, M.D.Saint Charles, MO 633011295795722
- Lawrence Tierney, M.D.Saint Charles, MO 633011053440222
- Mohhamed Omran, MDLake St Louis, MO 633671861592925
- James Petersen, M.D.Lake St Louis, MO 633671831169275
- Kamran Qureshi, MDLake St Louis, MO 633671417119926
- Joseph Rodemann, MDLake St Louis, MO 633671730101874
Common questions
What is David John Westrich, MD's NPI number?
David John Westrich, MD's National Provider Identifier (NPI) is 1679927230, issued on Apr 20, 2016. An NPI identifies a provider in billing; it is not a license.
Where is David John Westrich, MD located?
The NPPES record lists a practice address at 400 1St Capitol Dr Ste 201, Saint Charles, MO, 63301. Phone: (636) 669-2332. Providers update this record themselves, so call before visiting.
How can I verify David John Westrich, MD's license?
NPPES lists Missouri license number 2025021152, 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 David John Westrich, MD prescribe under Medicare Part D?
In 2024, David John Westrich, MD had 560 Medicare Part D claims for 129 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is David John Westrich, MD's MIPS final score?
The 2023 MIPS final score is 95.3 of 100. 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.