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

Marissa Elana Baron Mahan, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1740860378

Marissa Elana Baron Mahan, MD practises Obstetrics/Gynecology in Grand Rapids, Minnesota. Graduated from University of Pittsburgh School of Medicine in 2021, 5 years ago. Practices with Grand Itasca Clinic and Hospital, a 325-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
5
Trained at
University of Pittsburgh School of Medicine
Licensed in
MN
In the registry since
2021
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Grand Rapids, MN

Additional practice locations (1)

  • 1001 Main St Fl 5, Buffalo, NY 14203-1009 — (716) 323-0631

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 78816 (MN)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1740860378
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 8, 2021
Last updated in NPPESMay 27, 2025
Certification dateMay 27, 2025

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice Grand Itasca Clinic And Hospital — 325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of the uterus 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Grand Itasca Clinic and Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 325 clinicians in the practice; 12 are shown here.

Other providers in Grand Rapids