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

Dr. Troy R. Stiles, DO

Individual provider Psychiatry Physician · NPI 1437122207

Dr. Troy R. Stiles, DO is a Psychiatry in Billings, Montana. Graduated from Midwestern University, Chicago College of Osteopathic Med in 2001, 25 years ago. Practices with Big Sky Psychiatric Services PC, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Indiana and Montana.

Years since qualifying
25
Trained at
Midwestern University, Chicago College of Osteopathic Med
Licensed in
IN, MT
In the registry since
2006
Specialties on file
2
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

820 Division St
Billings, MT 59101-2049
Phone: (406) 294-5225
Fax: (406) 294-5226
Show map & directions

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

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 12326 (MT)
Psychiatry Physician Taxonomy 2084P0800X · Licence 02002661A (IN)

Record details

NPI number1437122207
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedFebruary 10, 2006
Last updated in NPPESApril 1, 2013
Mailing addressPo Box 21457, Billings, MT 59104-1457

Medicare enrollment

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

Medicare specialtyPSYCHIATRY
Medical schoolMIDWESTERN UNIVERSITY, CHICAGO COLLEGE OF OSTEOPATHIC MED
Graduated 2001 (25 years in practice)
Group practice Big Sky Psychiatric Services Pc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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