Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Marisa O'Neill, DO

Individual provider Surgery Physician · NPI 1093164873

Marisa O'Neill, DO practises General Surgery in Ypsilanti, Michigan. Graduated from Michigan State University College of Osteopathic Medicine in 2016, 10 years ago. Practices with Iha Health Services Corporation, a 1,146-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
10
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
MI
In the registry since
2016
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

5320 Elliott Dr Ste 203
Ypsilanti, MI 48197
Phone: (734) 712-1700
Fax: (734) 887-8938
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 28080 Grand River Ave, Farmington Hills, MI 48336-5966 — (248) 471-8829
  • 44201 Dequindre Rd, Troy, MI 48085-1117 — (248) 964-5000

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence 5101026448 (MI)

Record details

NPI number1093164873
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedJune 13, 2016
Last updated in NPPESMarch 15, 2024
Certification dateJune 9, 2021

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2016 (10 years in practice)
Group practice Iha Health Services Corporation — 1146 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations6 on file with Medicare

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.

Mastectomy 36 times · 90th percentile
Melanoma (skin cancer) excision 16 times · 71st percentile
Skin biopsy 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.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients79
Services billed 157 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

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

  • Chelsea Hospital Hospital · Chelsea, MI · listed as Chelsea Community Hospital
  • Trinity Health Ann Arbor Hospital Hospital · Ann Arbor, MI · listed as Trinity Health Michigan Ann Arbor
  • St Joe Mercy Hospital System Livonia Hospital · Livonia, MI
  • Trinity Health Livingston Hospital Hospital · Howell, MI

Colleagues at Iha Health Services Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1146 clinicians in the practice; 12 are shown here.

Other providers in Ypsilanti