John Stephen Mulvahill, M.D.
Internal Medicine Physician · Saint Louis, MO
John Stephen Mulvahill, M.D. is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1205195005, issued on May 14, 2012. Check the license (Missouri 2015016131, 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 Stephen Mulvahill
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 2015016131 MO
BP10043107 TX
P9234 TX
Self-reported in NPPES; status is on the state search - Practice location
- 10024 Watson RD, Saint Louis, MO 63126
- Phone
- (314) 919-2500
- Enumerated
- May 14, 2012
- Record last updated
- Jul 21, 2022
- Fax
- (314) 919-2577
- Medicare enrollment
- Enrolled (PECOS I20160322002826); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 10024 Watson RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anisha Chacko, MDInternal Medicine Physician1437504800
- Lindsey Duesterhaus, FNPFamily Nurse Practitioner1063783967
- Laura Esswein, MDAllergy Physician1174596860
- Rose Hiner, M.D.Internal Medicine Physician1235399817
- Candace HudsonNurse Practitioner1184733230
- Tulika Katyal, MDInternal Medicine Physician1194822304
Verify John Stephen Mulvahill 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 2015016131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.1 times the Medicare Part D claims of the average internal medicine physician in 2024
13,042 Medicare Part D claims for 919 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 431 claims were for opioids.
Most prescribed
- Atorvastatin Calcium1,242 claims
- Levothyroxine Sodium624 claims
- Lisinopril587 claims
- Amlodipine Besylate490 claims
- Losartan Potassium416 claims
- Rosuvastatin Calcium299 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.
Industry payments in 2024: $48.77
3 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Mercy Clinic East CommunitiesSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Stephen Mulvahill among 2,604 internal medicine physician records in Missouri
John Stephen Mulvahill, M.D. 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. Its NPI, issued in 2012, is newer than 56% of them.
- NPI issued2012 · 56% of these records are older, 42% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2012 · median 2006 among the 1,443 with a school on file
- Record last updated2022 · 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).
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 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anisha Chacko, MDSaint Louis, MO 631261437504800
- Rose Hiner, M.D.Saint Louis, MO 631261235399817
- Tulika Katyal, MDSaint Louis, MO 631261194822304
- Hei Jun Li, MDSaint Louis, MO 631261295319408
- Maung Htain LinSaint Louis, MO 631261720477029
- Roberto Perez, M.D.Saint Louis, MO 631261417972894
- Max Rich, MDSaint Louis, MO 631261023637568
- Tuyche Sang, MDSaint Louis, MO 631261376954610
Common questions
What is John Stephen Mulvahill, M.D.'s NPI number?
John Stephen Mulvahill, M.D.'s National Provider Identifier (NPI) is 1205195005, issued on May 14, 2012. An NPI identifies a provider in billing; it is not a license.
Where is John Stephen Mulvahill, M.D. located?
The NPPES record lists a practice address at 10024 Watson RD, Saint Louis, MO, 63126. Phone: (314) 919-2500. Providers update this record themselves, so call before visiting.
How can I verify John Stephen Mulvahill, M.D.'s license?
NPPES lists Missouri license number 2015016131, 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 Stephen Mulvahill, M.D. prescribe under Medicare Part D?
In 2024, John Stephen Mulvahill, M.D. had 13,042 Medicare Part D claims for 919 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.