NPPES file of Aug 9, 2026

Thomas S. Diemer, MD

Internal Medicine Physician · Cape Girardeau, MO

Thomas S. Diemer, MD is an internal medicine physician with a practice address in Cape Girardeau, Missouri, and NPI 1407880677, issued on Jul 11, 2006. Check the license (Missouri R3P56, 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
1407880677
Name
Thomas S. Diemer
Credential
MD
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
R3P56 MO
Self-reported in NPPES; status is on the state search
Practice location
211 Saint Francis Dr, Cape Girardeau, MO 63703
Phone
(573) 331-3000
Enumerated
Jul 11, 2006
Record last updated
Mar 8, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicaid ID
1407880677 MO
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.
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8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →

Also registered at 211 Saint Francis Dr

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

  1. Laura Al-Sayed, MDNeonatal-Perinatal Medicine Physician1063562734
  2. Mohammed Alomgir, DOInternal Medicine Physician1225665862
  3. Jesal Amin, MDEmergency Medicine Physician1548793532
  4. Aleksey Androsov, M.D.Neurology Physician1104258144
  5. Chad Armstrong, DOEmergency Medicine Physician1104056654
  6. Tony Asante, MDPain Medicine (Anesthesiology) Physician1083078752

Verify Thomas S. Diemer 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 R3P56    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.

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Thomas S. Diemer among 2,604 internal medicine physician records in Missouri

Thomas S. Diemer, 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 not. Its NPI, issued in 2006, is newer than 8% of them.

  • NPI issued2006 · 8% of these records are older, 59% newer
  • In a Medicare fileNo · 77% of these records are
  • In the CMS Doctors and Clinicians fileNo · 55% of these records are
  • Record last updated2021 · 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).

52 internal medicine physician records list a practice address in Cape Girardeau

They are 52 of the 1,897 NPPES records with a practice address in Cape Girardeau, and 2,604 internal medicine physician records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,604 in Missouri → Every provider in Cape Girardeau → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Ryan Davis, MDCape Girardeau, MO 637031861443301
  2. Robert Dodson, M.D.Cape Girardeau, MO 637031154349231
  3. Michael Flaim, D.O.Cape Girardeau, MO 637031346252509
  4. Matthew Frank, M.D.Cape Girardeau, MO 637031861659062
  5. Nefretiti Garrison-North, MDCape Girardeau, MO 637031023019015
  6. Carmelita Hudson-Kane, M.D.Cape Girardeau, MO 637031447297155
  7. Michael Jedlinski, M.D.Cape Girardeau, MO 637031962421750
  8. Meera Krishnan, MDCape Girardeau, MO 637031104920776

Common questions

What is Thomas S. Diemer, MD's NPI number?

Thomas S. Diemer, MD's National Provider Identifier (NPI) is 1407880677, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Thomas S. Diemer, MD located?

The NPPES record lists a practice address at 211 Saint Francis Dr, Cape Girardeau, MO, 63703. Phone: (573) 331-3000. Providers update this record themselves, so call before visiting.

How can I verify Thomas S. Diemer, MD's license?

NPPES lists Missouri license number R3P56, 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.