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

Gerald Mahon, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1154302289

Gerald Mahon, MD is a Geriatric Medicine (Internal Medicine) Physician in Saint Louis, Missouri. Works from 2 locations. Licensed in Missouri.

Licensed in
MO
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1201 S Grand Blvd
Saint Louis, MO 63104-1016
Phone: (314) 977-8462
Fax: (314) 977-3370
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 13303 Tesson Ferry Rd, Saint Louis, MO 63128-4062 — (314) 842-4744

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence R4H74 (MO)

Record details

NPI number1154302289
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 7, 2005
Last updated in NPPESMarch 12, 2021
Certification dateMarch 12, 2021

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