Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mariah Kellam, RN

Individual provider Family Nurse Practitioner · NPI 1083230304

Mariah Kellam, RN is a Nurse Practitioner in Chinook, 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
2020
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

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Practice location Address checks out

419 Pennsylvania St
Chinook, MT 59523-9726
Phone: (406) 357-2294
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 736 Alfalfa Ln, Chinook, MT 59523-9402 — (406) 262-3361

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence NUR-APRN-LIC-216413 (MT)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1083230304
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN
Sole proprietorNo
NPI enumeratedJune 23, 2020
Last updated in NPPESDecember 8, 2025
Certification dateDecember 8, 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 patients58
Services billed 104 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 Chinook