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

Individual provider Family Medicine Physician · NPI 1952410953

Shelly K. Castles, MD is a Family Practice in Billings, Montana. Graduated from Texas a & M University System, Hsc, College of Medicine in 1997, 29 years ago. Practices with Billings Clinic, a 805-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
29
Trained at
Texas a & M University System, Hsc, College of Medicine
Licensed in
MT
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

2675 Central Ave
Billings, MT 59102-6686
Phone: (406) 238-2500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 8422 (MT)

Record details

NPI number1952410953
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESFebruary 22, 2022
Certification dateFebruary 22, 2022

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolTEXAS A & M UNIVERSITY SYSTEM, HSC, COLLEGE OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Billings Clinic — 805 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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