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

Michael Peter O'Neil II, MD

Individual provider Anesthesiology Physician · NPI 1336160068

Michael Peter O'Neil II, MD is an Anesthesiology in Billings, Montana. Graduated from University of Washington School of Medicine in 1993, 33 years ago. Practices with Anesthesiology Consultants of Cheyenne LLC, a 17-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
33
Trained at
University of Washington School of Medicine
Licensed in
MT
In the registry since
2006
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

2800 10th Ave N
Billings, MT 59101-0703
Phone: (406) 896-2447
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 11143 (MT)

Record details

NPI number1336160068
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 21, 2006
Last updated in NPPESJanuary 29, 2020
Certification dateJanuary 29, 2020

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Group practice Anesthesiology Consultants Of Cheyenne Llc — 17 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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