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.
- 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
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.
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Verify John William Davis 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 2024022103Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
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.
Most prescribed
- Atorvastatin Calcium19 claims
- Pantoprazole Sodium14 claims
- Amlodipine Besylate13 claims
- Fluticasone Propionate13 claims
- Losartan Potassium13 claims
- 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.
All 58 in St Louis → All 2,604 in Missouri → Every provider in St Louis →
Other internal medicine physician records in Missouri
- Betty Abban, M.D.Springfield, MO1063893162
- Amer Abbas, MDSaint Louis, MO1508480666
- Fizza Abbas, MDSaint Louis, MO1588079230
- Marghoob Abbas, M.D.St Joseph, MO1588603781
- Muhammad Khalid Abbas, M.D.Springfield, MO1447877089
- Sundas Abbas, MDRichmond Heights, MO1649790486
- Hajira Abbasi, DOSaint Louis, MO1194036947
- Catey Abbott, DOSaint Louis, MO1699355347
- David Abbott, MDRichmond Heights, MO1568448850
- 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.