Troy R. Stiles, D.O.
NPI 1437122207ActiveIndividual· Psychiatry & Neurology, Psychiatry· Billings, MT
Psychiatry & Neurology, Psychiatry (D.O.) in Billings, Montana, trained at Midwestern University, Chicago College of Osteopathic Med (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $1,688,329 for 6,210 claims, against $54,929 paid for services in 2024. Teva Pharmaceuticals USA, Inc. was the largest of 11 companies reporting payments in 2025, $75,536 in all, mostly speaking and faculty fees.
Overview
| NPI | 1437122207 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Feb 10, 2006 |
| Last updated in NPPES | Apr 1, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 12326 | MT |
| Psychiatry & Neurology, Psychiatry | 2084P0800X | 02002661A | IN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (MT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 138 |
|---|---|
| Services billed | 920 across 9 procedure codes |
| Paid by Medicare | $54,929 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,210 · 8,102 30-day fills |
|---|---|
| Patients | 238 |
| Total drug cost | $1,688,329 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 2001 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- Big Sky Psychiatric Services PCBillings, MT · 2 clinicians
Hospital affiliations
- Beartooth Billings ClinicRed Lodge, MT
- Billings Clinic HospitalBillings, MT
Industry payments (Open Payments)
- 2025$75,536 · 116 payments from 11 companies
- 2024$24,712 · 61 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | $50,068 | 58 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $24,829 | 26 |
| Otsuka America Pharmaceutical, Inc. | $146.66 | 9 |
| Janssen Pharmaceuticals, Inc | $108.67 | 5 |
| Neurocrine Biosciences, Inc. | $80.53 | 3 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$64,442 · 31 payments
- Travel and Lodging$4,754 · 22 payments
- Consulting Fee$4,530 · 3 payments
- Food and Beverage$1,699 · 59 payments
- Education$111.49 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 52 psychiatrists in Billings · All psychiatrists in Montana