NPPES file of Aug 9, 2026

Michael Siemer, M.D.

Pediatrics Physician · Saint Louis, MO

Michael Siemer, M.D. is a pediatrics physician with a practice address in Saint Louis, Missouri, and NPI 1134280589, issued on Dec 12, 2006. Check the license (Missouri R8F24, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1134280589
Name
Michael Siemer
Credential
M.D.
Primary taxonomy
Pediatrics Physician 208000000X
License number
R8F24 MO
Self-reported in NPPES; status is on the state search
Practice location
621 S New Ballas RD, Saint Louis, MO 63141
Phone
(314) 251-6299
Enumerated
Dec 12, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(314) 251-4450
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest pediatrics physician records → All 1,560 in Missouri → Look up another NPI →

Also registered at 621 S New Ballas RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Shilpa Agashe, MDInternal Medicine Physician1710066212
  2. Christoper Ahlering, M.D.Obstetrics & Gynecology Physician1760419485
  3. Sarah Alander, MDPediatric Emergency Medicine (Emergency Medicine) Physician1891893764
  4. Tara Albert, CPNPPediatric Nurse Practitioner1124294764
  5. Muhammad Ali, M.D.Geriatric Medicine (Internal Medicine) Physician1790986024
  6. Henry Altepeter, M.D.Specialist1992792295

Verify Michael Siemer in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
    Search for license R8F24    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Missouri license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Michael Siemer among 1,560 pediatrics physician records in Missouri

Michael Siemer, M.D. is one of 1,560 pediatrics physician records with a practice address in Missouri. 34% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.

  • NPI issued2006 · 7% of these records are older, 63% newer
  • In a Medicare fileNo · 34% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • 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 208000000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

443 pediatrics physician records list a practice address in Saint Louis

They are 443 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,560 pediatrics physician records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,560 in Missouri → Every provider in Saint Louis → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Sara Ayers, MDSaint Louis, MO 631411114911062
  2. James Gerst, MDCreve Coeur, MO 631411770547150
  3. Thomas Kasper, MDSaint Louis, MO 631411366418238
  4. Robert Kebler, MDSaint Louis, MO 631411669466512
  5. James Krafcik, MDSaint Louis, MO 631411841266087
  6. Agnes Laus, MDSaint Louis, MO 631411881670974
  7. Leland Laycob, MDSaint Louis, MO 631411770559908
  8. Richard Lazaroff, M.D.Saint Louis, MO 631411407837289

Common questions

What is Michael Siemer, M.D.'s NPI number?

Michael Siemer, M.D.'s National Provider Identifier (NPI) is 1134280589, issued on Dec 12, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Michael Siemer, M.D. located?

The NPPES record lists a practice address at 621 S New Ballas RD, Saint Louis, MO, 63141. Phone: (314) 251-6299. Providers update this record themselves, so call before visiting.

How can I verify Michael Siemer, M.D.'s license?

NPPES lists Missouri license number R8F24, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.