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

Dorothy Sizemore, DO

Individual provider Family Medicine Physician · NPI 1205248465

Dorothy Sizemore, DO is a Family Practice in Billings, Montana. Qualified in 2014, 12 years ago. Practices with Yellowstone City-County Health Dept, a 52-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
12
Licensed in
MT
In the registry since
2014
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

123 S 27th St
Billings, MT 59101-4227
Phone: (406) 247-3306
Fax: (406) 247-3307
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 58761 (MT)

Record details

NPI number1205248465
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedMay 22, 2014
Last updated in NPPESJanuary 10, 2023
Certification dateJanuary 10, 2023
Mailing address123 S 27th St, Billings, MT 59101-4227

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 2014 (12 years in practice)
Group practice Yellowstone City-County Health Dept — 52 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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