Quick answers
- Which hospitals does Lenar T. Yessayan work at?
- Medicare's official clinician data lists Lenar T. Yessayan at 1 hospital: University of Michigan Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Lenar T. Yessayan see patients?
- Medicare's clinician data lists 3 practice locations, including Ann Arbor, MI and Livonia, MI. Call before your visit to confirm the address.
- What is Lenar T. Yessayan's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Lenar T. Yessayan accept Medicare assignment?
- Yes. Medicare's clinician data says Lenar T. Yessayan 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.
- What is the phone number for Lenar T. Yessayan?
- (888) 287-1084, as listed in official Medicare / NPI Registry data.
- What is Lenar T. Yessayan's NPI number?
- 1023210861. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Lenar T. Yessayan works
Medicare's Facility Affiliation Data lists Lenar T. Yessayan 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 Lenar T. Yessayan is enrolled with Medicare (CMS data updated 2026-10-02).
- 1500 E Medical Ctr DrAnn Arbor, MI 48109 (888) 287‑1084
- 19900 Haggerty RdLivonia, MI 48152 (888) 287‑1084
- 2850 S Industrial HwyAnn Arbor, MI 48104 (888) 287‑1084
Group practices
Medicare enrollment lists Lenar T. Yessayan as a member of this group (CMS data updated 2026-10-02).
- Regents of the University of Michigan3,346 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Ann Arbor
Clinicians with the same Medicare primary specialty in Ann Arbor, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2001 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023210861 |
| 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