Michael S. Schoenwalder, D.O.
Internal Medicine Physician · Ballwin, MO
Michael S. Schoenwalder, D.O. is an internal medicine physician with a practice address in Ballwin, Missouri, and NPI 1588631238, issued on Mar 1, 2006. Check the license (Missouri 2003014482, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Michael S. Schoenwalder
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2003014482 MO
Self-reported in NPPES; status is on the state search - Practice location
- 15945 Clayton RD, Ballwin, MO 63011
- Phone
- (636) 256-5350
- Enumerated
- Mar 1, 2006
- Record last updated
- May 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (636) 256-5372
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 15945 Clayton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael S. Schoenwalder 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 2003014482Check 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% more Medicare Part D claims than the average internal medicine physician in 2024
4,481 Medicare Part D claims for 430 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 110 claims were for opioids.
Most prescribed
- Liothyronine Sodium208 claims
- Losartan Potassium187 claims
- Alprazolam166 claims
- Levothyroxine Sodium145 claims
- Mounjaro134 claims
- Amlodipine Besylate129 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: $14.55
1 payment: food and beverage; the largest payer was Acella Pharmaceuticals, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Michael S. Schoenwalder among 2,604 internal medicine physician records in Missouri
Michael S. Schoenwalder, D.O. is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 59% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2011 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 internal medicine physician records list a practice address in Ballwin
They are 10 of the 562 NPPES records with a practice address in Ballwin, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Ballwin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rachel Dickerson, M.D.Ballwin, MO 630111174797427
- Kathryn Harvey-Feldewerth, DOBallwin, MO 630111700370996
- James Ketchum, MDBallwin, MO 630111386610376
- David Schlitt, M.D.Ballwin, MO 630111831166263
- David Schoenwalder, M.D.Ballwin, MO 630111306815451
- Christine Sigman, MDBallwin, MO 630111174591374
- Binwant Singh, M.D.Ballwin, MO 630111508932195
- Erin Arthur, MDSaint Louis, MO 630101669682175
Common questions
What is Michael S. Schoenwalder, D.O.'s NPI number?
Michael S. Schoenwalder, D.O.'s National Provider Identifier (NPI) is 1588631238, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Schoenwalder, D.O. located?
The NPPES record lists a practice address at 15945 Clayton RD, Ballwin, MO, 63011. Phone: (636) 256-5350. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Schoenwalder, D.O.'s license?
NPPES lists Missouri license number 2003014482, 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 Michael S. Schoenwalder, D.O. prescribe under Medicare Part D?
In 2024, Michael S. Schoenwalder, D.O. had 4,481 Medicare Part D claims for 430 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.