Quick answers
- Which hospitals does Joanna Mattis work at?
- Medicare's official clinician data lists Joanna Mattis at 1 hospital: University of Michigan Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joanna Mattis see patients?
- Medicare's clinician data lists 6 practice locations, including Ann Arbor, MI. Call before your visit to confirm the address.
- What is Joanna Mattis's specialty?
- Medicare lists Epileptologists as the primary specialty, and also Neurology.
- Does Joanna Mattis accept Medicare assignment?
- Yes. Medicare's clinician data says Joanna Mattis accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Joanna Mattis offer telehealth?
- Medicare's clinician data says Joanna Mattis offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Joanna Mattis?
- (734) 936-4185, as listed in official Medicare / NPI Registry data.
- What is Joanna Mattis's NPI number?
- 1245626449. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joanna Mattis works
Medicare's Facility Affiliation Data lists Joanna Mattis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Michigan Health SystemAnn Arbor, MI · Acute Care Hospital · CCN 230046
Practice locations
Addresses where Joanna Mattis is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1500 E Medical Ctr DrAnn Arbor, MI 48109
- 1500 E Medical Ctr Dr 1st Fl, Taubman Ctr Rec DAnn Arbor, MI 48109 (734) 936‑4185
- 1500 E Medical Ctr Dr 1st Fl Rec D, Taubman CenterAnn Arbor, MI 48109 (734) 764‑5175
- 1500 E Medical Ctr Dr 1st Fl Rec F, Mott HospitalAnn Arbor, MI 48109 (734) 764‑5176
- 1500 E Medical Ctr Dr 1st Floor, Taubman CenterAnn Arbor, MI 48108 (734) 936‑9010
Group practices
Medicare enrollment lists Joanna Mattis as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of Michigan3,346 clinicians in the group
Specialties
- Epileptologistsprimary
- Neurologyalso
Other epileptologists in Ann Arbor
Clinicians with the same Medicare primary specialty in Ann Arbor, MI — not a recommendation.
Clinician information
| Medical school | Stanford University School Of Medicine |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1245626449 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians