Ronald James Zegerius, MD

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

4301034102 Issued in MI

Practice address

601 John St
Suite M230
Kalamazoo, MI 49007-5341

Phone

(269) 345-9606

Fax

(269) 373-7095

NPI assigned

Dec 14, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/1902/brand/6/csg/45/fhir/r4
• Direct secure messaging: rzegerius10869@direct.bronsonhg.org

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

• Ascension Borgess Hospital

  • General Acute Care Hospital
  • Kalamazoo, MI
  • NPI 1568416311
  Medicare reassignment NPD
• Ascension Medical Group Promed

  • Family Medicine Physician
  • Portage, MI
  • NPI 1497709869

  Cardiovascular Disease

  Medicare reassignment NPD
• Ascension Borgess Hospital

  • Diagnostic Radiology Physician
  • Kalamazoo, MI
  • NPI 1518753441
  NPD
• Ascension Medical Group Promed

  • Obstetrics & Gynecology Physician
  • Kalamazoo, MI
  • NPI 1437201811
  NPD
• Promed Healthcare

  dba Borgess Women's Health

  • Rural Health Clinic/Center
  • Plainwell, MI
  • NPI 1487708830
  NPD
• Premier Cardiology PC

  • Cardiovascular Disease Physician
  • Kalamazoo, MI
  • NPI 1104952019
  NPD (past)
• Premier Medical Care P C

  dba Premier Radiology

  • Diagnostic Radiology Physician
  • Kalamazoo, MI
  • NPI 1487696589
  NPD (past)

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

{
    "created_epoch": "1134518400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1629053368",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "601 JOHN ST",
            "address_2": "SUITE M230",
            "city": "KALAMAZOO",
            "state": "MI",
            "postal_code": "490075341",
            "telephone_number": "269-345-9606",
            "fax_number": "269-373-7095"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "601 JOHN ST",
            "address_2": "SUITE M230",
            "city": "KALAMAZOO",
            "state": "MI",
            "postal_code": "490075341",
            "telephone_number": "269-345-9606",
            "fax_number": "269-373-7095"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ZEGERIUS",
        "first_name": "RONALD",
        "middle_name": "JAMES",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-14",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "MI",
            "license": "4301034102",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3520425",
            "state": "MI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Amie Lynn Zapf, LPN
• Fnu Zayeema
• Shaza Zayzafoon-Mosier, MD
• Ahed Zayzafoon, M.D.
• Laura Ann Zdziarski-Horodyski, PA
• Sandra Zegerivs, MA LLP LPC
• Daniela Lidia Zehr Butler, MSN, CNM
• Katherine Zeigert, LMSW
• Charles Leroy Zeller Jr., MD
• Desmond Zeng

• Cardiovascular Disease Physician in Kalamazoo, MI
• Providers in Kalamazoo, MI by specialty
• Cardiovascular Disease Physician in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.