Quick answers
- Does Mariia Nikolaeva accept Medicare assignment?
- Yes. Medicare's clinician data says Mariia Nikolaeva 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 Mariia Nikolaeva's NPI number?
- 1619522125. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mariia Nikolaeva works
Medicare's Facility Affiliation Data lists Mariia Nikolaeva at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Baptist Health - Fort SmithFort Smith, AR · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 040055
- Choctaw Nation Health Services AuthorityTalihina, OK · Acute Care Hospital · Emergency services: listed by Medicare · CCN 370172
- Mercy Hospital BoonevilleBooneville, AR · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 041318
- Mercy Hospital Fort SmithFort Smith, AR · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 040062
- Mercy Hospital ParisParis, AR · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 041300
Practice locations
Addresses where Mariia Nikolaeva is enrolled with Medicare (CMS data updated October 2, 2026).
- 3501 We Knight DrFort Smith, AR 72903 (479) 709‑6700
- 7001 Rogers Ave, Suite 401aFort Smith, AR 72903 (479) 314‑4650
- 7301 Rogers AveFort Smith, AR 72903 (479) 314‑5175
Group practices
Medicare enrollment lists Mariia Nikolaeva as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinic Fort Smith Communities372 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Fort Smith
Clinicians with the same Medicare primary specialty in Fort Smith, AR — not a recommendation.
Other clinicians in Mercy Clinic Fort Smith Communities
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2018 (8 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1619522125 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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