Marilyn F.m. Johnston, M.D.

Clinical Pathology/Laboratory Medicine Physician · Saint Louis, MO

Marilyn F.m. Johnston, M.D. is a clinical pathology/laboratory medicine physician with a practice address in Saint Louis, Missouri, and NPI 1538141668, issued on Nov 15, 2005. Check the license (Missouri R7131, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026

1538141668

Name: Marilyn F.m. Johnston
Credential: M.D.
Primary taxonomy: Clinical Pathology/Laboratory Medicine Physician 207ZP0105X
License number: R7131 MO
Self-reported in NPPES; status is on the state search
Practice location: 11133 Dunn RD, Saint Louis, MO 63136
Phone: (314) 653-5630
Enumerated: Nov 15, 2005
Record last updated: Apr 20, 2008 (not updated in 18 years: call before relying on the address or phone)
Fax: (314) 653-4099
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.

Download card Updates feed

8 nearest clinical pathology/laboratory medicine physician records → All 28 in Missouri → Look up another NPI →

Also registered at 11133 Dunn RD

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

Faqir Ahmad, MDEmergency Medicine Physician1487684957
Olaronke Akintola-Ogunremi, M.D.Anatomic Pathology & Clinical Pathology Physician1578545612
Anah Ali, MDEmergency Medicine Physician1942597992
Anna Arnold, PAPhysician Assistant1447882584
Ola Bamimore, MDEmergency Medicine Physician1992947832
Jenny Bao, MDEmergency Medicine Physician1275947095

Verify Marilyn F.m. Johnston 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 R7131Check the board
3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Marilyn F.m. Johnston among 28 clinical pathology/laboratory medicine physician records in Missouri

Marilyn F.m. Johnston, M.D. is one of 28 clinical pathology/laboratory medicine physician records with a practice address in Missouri. 43% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.

NPI issued2005 · 0% of these records are older, 93% newer
In a Medicare fileNo · 43% of these records are
In the CMS Doctors and Clinicians fileNo · 32% of these records are
Record last updated2008 · 61% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0105X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Pathology/Laboratory Medicine Physician providers in Missouri

There are 28 clinical pathology/laboratory medicine physician records in Missouri. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 28 in Missouri → Every provider in Saint Louis → Clinical Pathology/Laboratory Medicine Physician nationwide →

The 8 clinical pathology/laboratory medicine physician records with the nearest ZIP codes

Emily Schindler, MD, PHDSaint Louis, MO 631411629365259
Lii-Mei Tsai, MDSaint Louis, MO 631461447295993
Karen Lister, M.D.Saint Louis, MO 631221861563942
Aleksandar Babic, M.D., PH.D.St Louis, MO 631101548236961
Andres Dajles, MD,PHDSaint Louis, MO 631101386532117
Brian Edelson, M.D., PH.D.Saint Louis, MO 631101225118169
Gary Grajales-Reyes, M.D. PH.D.Saint Louis, MO 631101306323399
Joshua Hood, M.D., PH.D.Saint Louis, MO 631101437278306

Common questions

What is Marilyn F.m. Johnston, M.D.'s NPI number?

Marilyn F.m. Johnston, M.D.'s National Provider Identifier (NPI) is 1538141668, issued on Nov 15, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Marilyn F.m. Johnston, M.D. located?

The NPPES record lists a practice address at 11133 Dunn RD, Saint Louis, MO, 63136. Phone: (314) 653-5630. Providers update this record themselves, so call before visiting.

How can I verify Marilyn F.m. Johnston, M.D.'s license?

NPPES lists Missouri license number R7131, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.