Steven F. Willey, MD
Internal Medicine Physician · Chesterfield, MO
Steven F. Willey, MD is an internal medicine physician with a practice address in Chesterfield, Missouri, and NPI 1730108556, issued on Jul 19, 2006. Check the license (Missouri MD107032, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Steven F. Willey
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD107032 MO
Self-reported in NPPES; status is on the state search - Practice location
- 224 S Woods Mill RD, Chesterfield, MO 63017
- Phone
- (314) 469-0033
- Enumerated
- Jul 19, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (314) 469-0088
- Medicare enrollment
- Enrolled (PECOS I20040930000395); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1990
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 224 S Woods Mill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Steven F. Willey 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 MD107032Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average internal medicine physician in 2024
4,222 Medicare Part D claims for 243 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 139 claims were for opioids.
Most prescribed
- Levothyroxine Sodium216 claims
- Atorvastatin Calcium144 claims
- Omeprazole142 claims
- Rosuvastatin Calcium123 claims
- Amlodipine Besylate108 claims
- Zolpidem Tartrate99 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.
Bills Medicare through one group practice
- Aging Well Health Care, LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven F. Willey among 2,604 internal medicine physician records in Missouri
Steven F. Willey, MD 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 fileYes · 55% of these records are
- Graduated1990 · median 2006 among the 1,443 with a school on file
- Record last updated2007 · 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).
142 internal medicine physician records list a practice address in Chesterfield
They are 142 of the 2,132 NPPES records with a practice address in Chesterfield, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Chesterfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohammad Ahmed, MDChesterfield, MO 630171386636447
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- John Davidson, MDChesterfield, MO 630171306833801
- David Galli, M.D.Chesterfield, MO 630171255323374
- Thomas Hastings, MDChesterfield, MO 630171841281870
- John Helton, MDChesterfield, MO 630171417921156
- Richard Kozeny, MDChesterfield, MO 630171255319810
- Mark Novack, MDChesterfield, MO 630171114918737
Common questions
What is Steven F. Willey, MD's NPI number?
Steven F. Willey, MD's National Provider Identifier (NPI) is 1730108556, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven F. Willey, MD located?
The NPPES record lists a practice address at 224 S Woods Mill RD, Chesterfield, MO, 63017. Phone: (314) 469-0033. Providers update this record themselves, so call before visiting.
How can I verify Steven F. Willey, MD's license?
NPPES lists Missouri license number MD107032, 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 Steven F. Willey, MD prescribe under Medicare Part D?
In 2024, Steven F. Willey, MD had 4,222 Medicare Part D claims for 243 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.