Quick answers
- Does Naomi D. Routen accept Medicare assignment?
- Yes. Medicare's clinician data says Naomi D. Routen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Naomi D. Routen see?
- In 2024, CMS data shows 42 Original Medicare patients and 236 services for Naomi D. Routen. This counts Original Medicare only and measures volume, not quality.
- What is Naomi D. Routen's NPI number?
- 1902293822. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Naomi D. Routen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 42 |
|---|---|
| Services billed to Medicare | 236 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)140 services
- Psychotherapy with evaluation and management visit, 30 minutes (90833)55 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Anxiety75%
- Depression71%
- Arthritis60%
- High blood pressure57%
- High cholesterol48%
- Chronic kidney disease29%
Practice locations
Addresses where Naomi D. Routen is enrolled with Medicare (CMS data updated October 2, 2026).
- 820 Division StBillings, MT 59101 (406) 294‑5225
- 933 Constitution AveBillings, MT 59105 (406) 200‑8471
Group practices
Medicare enrollment lists Naomi D. Routen as a member of these groups (CMS data updated October 2, 2026).
- Frontier Psychiatry PLLC34 clinicians in the group
- Big Sky Psychiatric Services PC2 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Billings
Clinicians with the same Medicare primary specialty in Billings, MT — not a recommendation.
Other clinicians in Frontier Psychiatry PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1902293822 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians