Lenar Tatios Yessayan, M.D.

Primary specialty

Nephrology PhysicianTaxonomy code 207RN0300X

License

4301082653 Issued in MI

Practice address

2850 South Industrial Hwy
Ann Arbor, MI 48104-6796

Phone

(734) 677-1490

NPI assigned

Jun 4, 2007

Last updated

Jan 14, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in MI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

NephrologyAlso: Internal Medicine

Education

Other, 2001

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Regents of the University of MichiganGroup PAC ID 3779496856, 3,344 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Univ of Mi Dialysis Clinics - Livonia Dialysis facility, Livonia, MI, CCN 232577
• University of Michigan Health System Hospital, Ann Arbor, MI, CCN 230046

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Regents of the University of Michigan

  • Nephrology Physician
  • Ann Arbor, MI
  • NPI 1003848144

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Regents of the University of Michigan

  • Specialty Pharmacy
  • Dexter, MI
  • NPI 1952181919
  NPD
• Regents of the University of Michigan

  dba University of Michigan Health System

  • General Acute Care Hospital
  • Ann Arbor, MI
  • NPI 1003878539
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Michigan Dialysis Services, LLC

  dba Univ of Michigan Dialysis - Livonia

  • End-Stage Renal Disease (ESRD) Treatment Clinic/Center
  • Livonia, MI
  • NPI 1306963624

  Dialysis facility

  Care Compare affiliation Name & address match
• Regents of the University of Michigan

  dba University of Michigan Health System

  • General Acute Care Hospital
  • Ann Arbor, MI
  • NPI 1003878539
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1180915200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768348800000",
    "number": "1023210861",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3621 S STATE ST",
            "city": "ANN ARBOR",
            "state": "MI",
            "postal_code": "481081633",
            "telephone_number": "734-647-5299"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2850 SOUTH INDUSTRIAL HWY",
            "city": "ANN ARBOR",
            "state": "MI",
            "postal_code": "481046796",
            "telephone_number": "734-677-1490"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "YESSAYAN",
        "first_name": "LENAR",
        "middle_name": "TATIOS",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-06-04",
        "last_updated": "2026-01-14",
        "certification_date": "2026-01-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MI",
            "license": "4301082653",
            "primary": false
        },
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "MI",
            "license": "4301082653",
            "primary": false
        },
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "MI",
            "license": "4301082653",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Prasanthi Yelavarthy
• Gary Yen, MD
• Jessica Yen, MD
• Dorothy T Yenni, NP
• Sarah Elizabeth Yentz, M.D.
• Brian Yetter, DDS
• Tian Yeung
• Alexander Yevzlin, MD
• Zeynep Naciye Yilmaz-Saab, MD
• Zerrin Emine Yilmaz, D.D.S.

• Nephrology Physician in Ann Arbor, MI
• Providers in Ann Arbor, MI by specialty
• Nephrology Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 14, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.