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

Nathan Kellis, MD

Individual provider Hospitalist Physician · NPI 1942688627

Nathan Kellis, MD is a Hospitalist in Boise, Idaho. Graduated from State University of Ny Upstate Medical University in 2015, 11 years ago. Practices with Saint Alphonsus Regional Medical Center Inc, a 673-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arizona and Idaho.

Years since qualifying
11
Trained at
State University of Ny Upstate Medical University
Licensed in
AZ, ID
In the registry since
2015
Specialties on file
3
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

1055 N Curtis Rd
Boise, ID 83706-1309
Phone: (208) 367-6279
Fax: (208) 367-3951
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1501 N Campbell Ave, Tucson, AZ 85724-5040 — (801) 669-2548

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence M-13948 (ID)
Internal Medicine Physician Taxonomy 207R00000X · Licence R74964 (AZ)
Internal Medicine Physician Taxonomy 207R00000X · Licence M-13948 (ID)

Record details

NPI number1942688627
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 13, 2015
Last updated in NPPESAugust 1, 2018

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolSTATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
Graduated 2015 (11 years in practice)
Group practice Saint Alphonsus Regional Medical Center Inc — 673 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients235
Services billed 668 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 Saint Alphonsus Regional Medical Center Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 673 clinicians in the practice; 12 are shown here.

Other providers in Boise