Quick answers
- Does Sylvia F. Longknife accept Medicare assignment?
- Yes. Medicare's clinician data says Sylvia F. Longknife 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.
- What is Sylvia F. Longknife's NPI number?
- 1942490511. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Sylvia F. Longknife is enrolled with Medicare (CMS data updated October 2, 2026).
- 107 H St, P O Box 67Poplar, MT 59255
- 107 H St E, P O Box 67Poplar, MT 59255
Group practices
Medicare enrollment lists Sylvia F. Longknife as a member of this group (CMS data updated October 2, 2026).
- US Health Dept of Health and Human Services94 clinicians in the group
Specialties
- Mental Health Counselorprimary
Other mental health counselors in Montana
Clinicians with the same Medicare primary specialty in Montana — not a recommendation.
Other clinicians in US Health Dept of Health and Human Services
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2006 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942490511 |
| 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
- 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