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

Derik Neilson, DO

Individual provider Anesthesiology Physician · NPI 1508362518

Derik Neilson, DO practises Anesthesiology in Great Falls, Montana. Graduated from Lincoln Memorial University Medical Department in 2018, 8 years ago. Practices with Benefis Hospitals Inc, a 398-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
8
Trained at
Lincoln Memorial University Medical Department
Licensed in
MT
In the registry since
2018
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1101 26th St S
Great Falls, MT 59405-5161
Phone: (406) 731-8888
Fax: (406) 731-8318
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 1 Childrens Way, Little Rock, AR 72202-3500 — (501) 364-1100
  • 4301 W Markham St # 515, Little Rock, AR 72205-7101 — (501) 686-6114
  • 29578 Morning View Ln, Bigfork, MT 59911-5816 — (406) 250-1881

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 110697 (MT)

Record details

NPI number1508362518
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedMarch 30, 2018
Last updated in NPPESApril 8, 2024
Certification dateApril 8, 2024

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolLINCOLN MEMORIAL UNIVERSITY MEDICAL DEPARTMENT
Graduated 2018 (8 years in practice)
Group practice Benefis Hospitals Inc — 398 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 patients185
Services billed 214 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Benefis Hospitals Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 398 clinicians in the practice; 12 are shown here.

Other providers in Great Falls