Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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James Allan Denisar-Green, MD, PHD

Individual provider Family Medicine Physician · NPI 1417303793

James Allan Denisar-Green, MD, PHD is registered under Family Practice in Billings, Montana. Graduated from University of North Carolina at Chapel Hill School of Medicine in 2016, 10 years ago. Practices with Yellowstone City-County Health Dept, a 52-clinician group and accepts Medicare assignment. Licensed in Montana and Washington.

Years since qualifying
10
Trained at
University of North Carolina at Chapel Hill School of Medicine
Licensed in
MT, WA
In the registry since
2016
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

123 S 27th St
Billings, MT 59101-4227
Phone: (406) 247-3350
Fax: (406) 247-3389
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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 96797 (MT)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD60969576 (WA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1417303793
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorNo
NPI enumeratedMay 5, 2016
Last updated in NPPESJune 22, 2021
Certification dateJune 22, 2021

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL SCHOOL OF MEDICINE
Graduated 2016 (10 years in practice)
Group practice Yellowstone City-County Health Dept — 52 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 patients40
Services billed 60 a service is one billed item, such as a visit, a test or a procedure
Average patient age68

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. Those with a page here are linked.

  • Billings Clinic Hospital Hospital · Billings, MT · listed as Billings Clinic
  • Intermountain Health St Vincent Regional Hospital Hospital · Billings, MT

Colleagues at Yellowstone City-County Health Dept

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 52 clinicians in the practice; 12 are shown here.

Other providers in Billings