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

Mary Patricia Mortell, MD

Individual provider Gastroenterology Physician · NPI 1851370142

Mary Patricia Mortell, MD practises Gastroenterology in Ann Arbor, Michigan. Graduated from University of Michigan Medical School in 1989, 37 years ago. Practices with Regents of the University of Michigan, a 3,271-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Michigan.

Years since qualifying
37
Trained at
University of Michigan Medical School
Licensed in
MI
In the registry since
2006
Specialties on file
2
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

1500 E Medical Center Dr
Ann Arbor, MI 48109-5000
Phone: (734) 936-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 5300 Elliott Dr, Ypsilanti, MI 48197-8632 — (734) 434-6262

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 4301406545 (MI)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 406545 (MI)

Record details

NPI number1851370142
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 13, 2006
Last updated in NPPESApril 24, 2023
Certification dateApril 24, 2023

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1989 (37 years in practice)
Group practice Regents Of The University Of Michigan — 3271 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations19 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.

Colonoscopy 70 times · 71st percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 37 times · 59th percentile

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 patients197
Services billed 291 a service is one billed item, such as a visit, a test or a procedure
Average patient age69

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.

Colleagues at Regents of the University of Michigan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3271 clinicians in the practice; 12 are shown here.

Other providers in Ann Arbor