NPPES file of Aug 9, 2026

John William Davis, MD PHD

Internal Medicine Physician · St Louis, MO

John William Davis, MD PHD is an internal medicine physician with a practice address in St Louis, Missouri, and NPI 1306689823, issued on Jun 13, 2024. Check the license (Missouri 2024022103, 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
1306689823
Name
John William Davis
Credential
MD PHD
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
2024022103 MO
Self-reported in NPPES; status is on the state search
Practice location
1 Barnes Jewish Hospital Plaza, St Louis, MO 63110
Phone
(314) 747-3000
Enumerated
Jun 13, 2024
Record last updated
Jun 13, 2024
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 1 Barnes Jewish Hospital Plaza

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

  1. Fritz Breckner, D.O.Emergency Medicine Physician1639465669
  2. Zachariah Cole, DMD, MDOral & Maxillofacial Surgery (D.M.D.)1639605413
  3. Michael Fullenkamp, M.D.Emergency Medicine Physician1053408864
  4. Kavita Patwardhan, MDInternal Medicine Physician1932942661
  5. Bibi Shazeeda Razak, M.D.Student in an Organized Health Care Education/Training Program1801533666

Verify John William Davis 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 2024022103
    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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91% fewer Medicare Part D claims than the average internal medicine physician in 2024

295 Medicare Part D claims for 42 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. John Davis295
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium19 claims
  2. Pantoprazole Sodium14 claims
  3. Amlodipine Besylate13 claims
  4. Fluticasone Propionate13 claims
  5. Losartan Potassium13 claims
  6. Lisinopril12 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.

58 internal medicine physician records list a practice address in St Louis

They are 58 of the 1,420 NPPES records with a practice address in St Louis, and 2,604 internal medicine physician records in Missouri.

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 John William Davis, MD PHD's NPI number?

John William Davis, MD PHD's National Provider Identifier (NPI) is 1306689823, issued on Jun 13, 2024. An NPI identifies a provider in billing; it is not a license.

Where is John William Davis, MD PHD located?

The NPPES record lists a practice address at 1 Barnes Jewish Hospital Plaza, St Louis, MO, 63110. Phone: (314) 747-3000. Providers update this record themselves, so call before visiting.

How can I verify John William Davis, MD PHD's license?

NPPES lists Missouri license number 2024022103, 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 John William Davis, MD PHD prescribe under Medicare Part D?

In 2024, John William Davis, MD PHD had 295 Medicare Part D claims for 42 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.