Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Marianna W. Horn, MD

Individual provider Pediatric Hematology & Oncology Physician · NPI 1083692057

Marianna W. Horn, MD is a Pediatric Hematology & Oncology Physician in Washington, District of Columbia. Licensed in Virginia. Registered with an NPI since 2006.

Licensed in
VA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

700 2nd St NE
Washington, DC 20002-8100
Phone: (202) 346-3000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Hematology & Oncology Physician (primary) Taxonomy 2080P0207X · Licence 0101054079 (VA)

Record details

NPI number1083692057
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 9, 2006
Last updated in NPPESJanuary 11, 2013

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