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

Mrs. Clancy Joyce Hartman, FNP-C

Individual provider Family Nurse Practitioner · NPI 1235818535

Mrs. Clancy Joyce Hartman, FNP-C is a Nurse Practitioner in Lewistown, Montana. Qualified in 2023, 3 years ago. Practices with Bighorn Valley Health Center Incorporated, a 86-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
3
Licensed in
MT
In the registry since
2023
What do these letters mean?
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

311 W Main St
Lewistown, MT 59457-2760
Phone: (406) 535-6545
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 300 1st Ave N Ste 202, Lewistown, MT 59457-1700 — (406) 535-8811

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 217113 (MT)

Record details

NPI number1235818535
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP-C
Sole proprietorNo
NPI enumeratedJuly 13, 2023
Last updated in NPPESDecember 5, 2025
Certification dateDecember 5, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Bighorn Valley Health Center Incorporated — 86 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients27
Services billed 42 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Bighorn Valley Health Center Incorporated

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 86 clinicians in the practice; 12 are shown here.

Other providers in Lewistown