Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Mariia Nikolaeva, MD

Individual provider Internal Medicine Physician · NPI 1619522125

Dr. Mariia Nikolaeva, MD practises Internal Medicine in Fort Smith, Arkansas. Qualified in 2018, 8 years ago. Practices with Mercy Clinic Fort Smith Communities, a 350-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Arkansas and Massachusetts.

Years since qualifying
8
Licensed in
AR, MA
In the registry since
2019
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

7001 Rogers Ave Ste 401A
Fort Smith, AR 72903-4034
Phone: (479) 314-4650
Fax: (479) 452-9459
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 736 Cambridge St, Brighton, MA 02135-2907 — (617) 789-3000

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence E-18517 (AR)
Internal Medicine Physician Taxonomy 207R00000X · Licence E-18517 (AR)
Internal Medicine Physician Taxonomy 207R00000X · Licence 280821 (MA)

Record details

NPI number1619522125
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 2, 2019
Last updated in NPPESAugust 6, 2025
Certification dateAugust 6, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Mercy Clinic Fort Smith Communities — 350 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $32 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Mercy Clinic Fort Smith Communities

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 350 clinicians in the practice; 12 are shown here.

Other providers in Fort Smith