John D. Pfeifer, MD
Molecular Genetic Pathology (Pathology) Physician · Saint Louis, MO
John D. Pfeifer, MD is a molecular genetic pathology (pathology) physician with a practice address in Saint Louis, Missouri, and NPI 1306864822, issued on Jul 17, 2006. Check the license (Missouri 101865, 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 D. Pfeifer
- Credential
- MD
- Primary taxonomy
- Molecular Genetic Pathology (Pathology) Physician 207ZP0007X
- License number
- 101865 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110
- Phone
- (314) 362-5641
- Enumerated
- Jul 17, 2006
- Record last updated
- Apr 17, 2025
- Fax
- (314) 362-0369
- Medicaid ID
- 208282004 MO
- Medicare enrollment
- Enrolled (PECOS I20100305000516); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1988
- Entity
- Type 1 · individual
3 nearest molecular genetic pathology (pathology) physician records → All 4 in Missouri → Look up another NPI →
Also registered at 1 Barnes Jewish Hospital Plz
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John D. Pfeifer 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 101865Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 79.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Washington UniversitySaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Molecular Genetic Pathology (Pathology) Physician providers in Missouri
There are 4 molecular genetic pathology (pathology) physician records in Missouri.
All 4 in Missouri → Every provider in Saint Louis → Molecular Genetic Pathology (Pathology) Physician nationwide →
The 3 molecular genetic pathology (pathology) physician records with the nearest ZIP codes
- Jonathan Heusel, MDSaint Louis, MO 631081255329058
- Julie Neidich, MDSaint Louis, MO 631081962690180
- Lulu Sun, MDSaint Louis, MO 631081043662067
Common questions
What is John D. Pfeifer, MD's NPI number?
John D. Pfeifer, MD's National Provider Identifier (NPI) is 1306864822, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John D. Pfeifer, MD located?
The NPPES record lists a practice address at 1 Barnes Jewish Hospital Plz, Saint Louis, MO, 63110. Phone: (314) 362-5641. Providers update this record themselves, so call before visiting.
How can I verify John D. Pfeifer, MD's license?
NPPES lists Missouri license number 101865, 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.
What is John D. Pfeifer, MD's MIPS final score?
The 2023 MIPS final score is 79.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.