Gay J. Canaris, MD
NPI 1851358147ActiveIndividual· Internal Medicine· Billings, MT
Internal Medicine (MD) in Billings, Montana, trained at Southwest School of Medicine and Hospital (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $250,220 for 3,458 claims, against $28,322 paid for services in 2024.
Overview
| NPI | 1851358147 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 28, 2006 |
| Last updated in NPPES | Feb 22, 2022 |
| Certified by provider | Feb 22, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 20200 | NE |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 409 |
|---|---|
| Services billed | 799 across 15 procedure codes |
| Paid by Medicare | $28,322 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,458 · 8,718 30-day fills |
|---|---|
| Patients | 302 |
| Total drug cost | $250,220 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Southwest School of Medicine and Hospital |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Internal Medicine |
Medical group
- Billings Clinic Specialty Supplies and Services, LLCBillings, MT · 824 clinicians
Hospital affiliations
- Billings Clinic HospitalBillings, MT
- Intermountain Health St Vincent Regional HospitalBillings, MT
- Sheridan Memorial HospitalSheridan, WY
- Stillwater Billings ClinicColumbus, MT
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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