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

Dr. Grant Michael Barnum, DO

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1639178445

Dr. Grant Michael Barnum, DO is a Geriatric Medicine (Internal Medicine) Physician in Lake Ozark, Missouri. Licensed in Missouri. Registered with an NPI since 2005.

Licensed in
MO
In the registry since
2005
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1870 Bagnell Dam Blvd
Lake Ozark, MO 65049-8658
Phone: (573) 365-2318
Fax: (573) 365-3009
Show map & directions

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

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence DOR4GO2 (MO)

Record details

NPI number1639178445
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 14, 2005
Last updated in NPPESMay 5, 2008
Mailing address54 Hospital Dr, Osage Beach, MO 65065-3050