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

Haley Rose Mertens, MD

Individual provider Internal Medicine Physician · NPI 1326545021

Haley Rose Mertens, MD is an Internal Medicine Physician in Ann Arbor, Michigan. Licensed in Michigan and Wisconsin. Registered with an NPI since 2018.

Licensed in
MI, WI
In the registry since
2018
Specialties on file
5
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.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 4301508956 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4301508956 (MI)
Hospitalist Physician Taxonomy 208M00000X · Licence 72887 (WI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Internal Medicine Physician Taxonomy 207R00000X · Licence 72887 (WI)

Record details

NPI number1326545021
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 9, 2018
Last updated in NPPESJune 19, 2026
Certification dateJune 19, 2026

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