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

Dr. Dennis E Hallahan, MD

Individual provider Radiation Oncology Physician · NPI 1699867010

Dr. Dennis E Hallahan, MD is a Radiation Oncology Physician in Saint Louis, Missouri. Licensed in Missouri. Registered with an NPI since 2006.

Licensed in
MO
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

4921 Parkview Pl Dept Radiation Oncology LL
Saint Louis, MO 63110-1032
Phone: (314) 747-7236
Fax: (314) 362-8099
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 2009038834 (MO)

Record details

NPI number1699867010
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 30, 2006
Last updated in NPPESApril 17, 2025
Mailing addressPo Box 7412011, Chicago, IL 60674-2011

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