Stanley Vriezelaar, M.D.
Internal Medicine Physician · Saint Louis, MO
Stanley Vriezelaar, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1649252552, issued on Nov 16, 2005. Check the license (Missouri R4D79, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Stanley Vriezelaar
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R4D79 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1027 Bellevue Ave, Saint Louis, MO 63117
- Phone
- (314) 645-3743
- Enumerated
- Nov 16, 2005
- Record last updated
- Oct 1, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (314) 647-7967
- Medicare enrollment
- Enrolled (PECOS I20071130000609); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1981
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 1027 Bellevue Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephen Allen, PTPhysical Therapist1316252554
- Phillip Apprill, M.D.Interventional Cardiology Physician1235135310
- Christopher Bauer, M.D.Clinical Cardiac Electrophysiology Physician1437123254
- Rebecca Bruggers, PA-CPhysician Assistant1376563155
- Kathleen Brunts, M.D.Internal Medicine Physician1851382204
- Saovarot Bryant, ANPAdult Health Nurse Practitioner1184879413
Verify Stanley Vriezelaar 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 R4D79Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.4 times the Medicare Part D claims of the average internal medicine physician in 2024
13,828 Medicare Part D claims for 886 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 440 claims were for opioids.
Most prescribed
- Atorvastatin Calcium922 claims
- Amlodipine Besylate672 claims
- Metformin Hcl490 claims
- Losartan Potassium478 claims
- Lisinopril459 claims
- Hydrochlorothiazide325 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: $432.16
23 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. 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.
Bills Medicare through one group practice
- American Multispecialty Group IncSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stanley Vriezelaar among 2,604 internal medicine physician records in Missouri
Stanley Vriezelaar, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1981 · median 2006 among the 1,443 with a school on file
- Record last updated2012 · 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).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Abbott, MDRichmond Heights, MO 631171568448850
- Monika Aplyn, M.D.Saint Louis, MO 631171336195247
- Kathleen Brunts, M.D.Saint Louis, MO 631171851382204
- Danita Cole, MDSaint Louis, MO 631171639152374
- Mohammad Emami, MDSaint Louis, MO 631171598712671
- Snehal Gandhi, M.D.Saint Louis, MO 631171184608689
- William Guyol, MDSaint Louis, MO 631171396738019
- Alka Kapoor, MDSaint Louis, MO 631171639122633
Common questions
What is Stanley Vriezelaar, M.D.'s NPI number?
Stanley Vriezelaar, M.D.'s National Provider Identifier (NPI) is 1649252552, issued on Nov 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Stanley Vriezelaar, M.D. located?
The NPPES record lists a practice address at 1027 Bellevue Ave, Saint Louis, MO, 63117. Phone: (314) 645-3743. Providers update this record themselves, so call before visiting.
How can I verify Stanley Vriezelaar, M.D.'s license?
NPPES lists Missouri license number R4D79, 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 Stanley Vriezelaar, M.D. prescribe under Medicare Part D?
In 2024, Stanley Vriezelaar, M.D. had 13,828 Medicare Part D claims for 886 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.