NPPES file of Aug 9, 2026

Simon M. Yu, M.D.

Internal Medicine Physician · Saint Louis, MO

Simon M. Yu, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1235331687, issued on Jun 5, 2007. Check the license (Missouri R2F28, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1235331687
Name
Simon M. Yu
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
R2F28 MO
Self-reported in NPPES; status is on the state search
Practice location
11710 Old Ballas RD, Saint Louis, MO 63141
Phone
(314) 432-7802
Enumerated
Jun 5, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(314) 432-1971
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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Also registered at 11710 Old Ballas RD

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

  1. Catherine Mackie, M.A., L.P.C.Professional Counselor1407941461
  2. Thomas Matthes, DDSProsthodontics1508951666
  3. John McGreal, ODOptometrist1689661886
  4. Robert Olk, MDOphthalmology Physician1265429245
  5. Jason Rhodes, D.C.Chiropractor1891120341

Verify Simon M. Yu 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 R2F28    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

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96% fewer Medicare Part D claims than the average internal medicine physician in 2024

133 Medicare Part D claims for 51 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. Simon Yu133
  2. Specialty average3,176

Most prescribed

  1. Azithromycin59 claims
  2. Doxycycline Hyclate20 claims
  3. Nystatin18 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.

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 941 in Saint Louis → All 2,604 in Missouri → Every provider in Saint Louis →

Other internal medicine physician records in Missouri

  1. Betty Abban, M.D.Springfield, MO1063893162
  2. Amer Abbas, MDSaint Louis, MO1508480666
  3. Fizza Abbas, MDSaint Louis, MO1588079230
  4. Marghoob Abbas, M.D.St Joseph, MO1588603781
  5. Muhammad Khalid Abbas, M.D.Springfield, MO1447877089
  6. Sundas Abbas, MDRichmond Heights, MO1649790486
  7. Hajira Abbasi, DOSaint Louis, MO1194036947
  8. Catey Abbott, DOSaint Louis, MO1699355347
  9. David Abbott, MDRichmond Heights, MO1568448850
  10. Wael Abduljaber, MDSaint Louis, MO1174101489

Common questions

What is Simon M. Yu, M.D.'s NPI number?

Simon M. Yu, M.D.'s National Provider Identifier (NPI) is 1235331687, issued on Jun 5, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Simon M. Yu, M.D. located?

The NPPES record lists a practice address at 11710 Old Ballas RD, Saint Louis, MO, 63141. Phone: (314) 432-7802. Providers update this record themselves, so call before visiting.

How can I verify Simon M. Yu, M.D.'s license?

NPPES lists Missouri license number R2F28, 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 Simon M. Yu, M.D. prescribe under Medicare Part D?

In 2024, Simon M. Yu, M.D. had 133 Medicare Part D claims for 51 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.

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.