IndividualActive
Marilyn Johnston, M.D.
NPI 1538141668 · Clinical Pathology/Laboratory Medicine Physician · Saint Louis, MO
Provider details
- NPI number
- 1538141668
- Entity type
- Individual
- Primary specialty
- Clinical Pathology/Laboratory Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- R7131 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
11133 Dunn Rd
Dept. of Pathology
Saint Louis, MO 63136-6119
Phone: (314) 653-5630
Fax: (314) 653-4099
Street-level locationGet directions
Mailing address
Po Box 144333
Orlando, FL 32814-4333
Registry dates
- Enumerated
- 2005-11-15
- Last updated
- 2008-04-20
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.