Michael Neinast, DO

Primary specialty

Nephrology PhysicianTaxonomy code 207RN0300X

License

22603 Issued in CA

Practice address

101 The City Dr S
Orange, CA 92868-3201

Phone

(714) 456-8888

NPI assigned

May 12, 2020

Last updated

Jul 22, 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 IL

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 Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mneinastdo384275@carlehiedirect.net

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.

• Board of Trustees of Southern Illinois University

  dba Siu Center for Family Medicine

  • Primary Care Clinic/Center
  • Springfield, IL
  • NPI 1396097960
  Medicare reassignment NPD
• Carle West Physician Group Inc

  • Family Medicine Physician
  • Normal, IL
  • NPI 1467074138
  Medicare reassignment NPD
• Siu Physicians & Surgeons, Inc

  dba SIU HealthCare

  • Endocrinology, Diabetes & Metabolism Physician
  • Springfield, IL
  • NPI 1558385989

  Internal Medicine

  Medicare reassignment NPD
• Board of Trustees of Southern Illinois University

  dba SIU Center for Family Medicine - Care-A-Van

  • Federally Qualified Health Center (FQHC)
  • Carbondale, IL
  • NPI 1568210425
  NPD
• Siu Physicians & Surgeons, Inc

  • Durable Medical Equipment & Medical Supplies
  • Springfield, IL
  • NPI 1164055976
  NPD

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

{
    "created_epoch": "1589241600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784678400000",
    "number": "1770105769",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "101 THE CITY DR S",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928683201"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "101 THE CITY DR S",
            "city": "ORANGE",
            "state": "CA",
            "postal_code": "928683201",
            "telephone_number": "714-456-8888"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "751 N Rutledge St Ste 1100",
            "address_purpose": "LOCATION",
            "city": "Springfield",
            "state": "IL",
            "postal_code": "627024968",
            "country_code": "US",
            "telephone_number": "217-545-8000",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1300 Franklin Ave Ste 380",
            "address_purpose": "LOCATION",
            "city": "Normal",
            "state": "IL",
            "postal_code": "617614266",
            "country_code": "US",
            "telephone_number": "309-268-3598",
            "fax_number": "309-268-2536",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "701 N 1st St",
            "address_purpose": "LOCATION",
            "city": "Springfield",
            "state": "IL",
            "postal_code": "627023757",
            "country_code": "US",
            "telephone_number": "217-545-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NEINAST",
        "first_name": "MICHAEL",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-05-12",
        "last_updated": "2026-07-22",
        "certification_date": "2026-07-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "125075898",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "IL",
            "license": "036.163604",
            "primary": false
        },
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "CA",
            "license": "22603",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lessly Negrete-Tuy, B.C.B.A.
• Angelica Negrete
• Beatriz Negrete
• Ricardo Jose Negron
• Andrew Nei
• Alicia Nelson
• Christina Nelson, DNP, RN, AGACNP-BC
• Edward L Nelson, MD
• Jessica Nelson
• John Stuart Nelson, MD

• Nephrology Physician in Orange, CA
• Providers in Orange, CA by specialty
• Nephrology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 22, 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.