Greta A. Bray, CRNA

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

4704369772 Issued in MI

Practice address

1215 E Michigan Ave
Lansing, MI 48912-1811

Phone

(408) 851-6020

NPI assigned

Mar 11, 2008

Last updated

Jul 29, 2025By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Greta Wiedemann Former name

Medicare fee-for-service enrollment

Enrolled in MI

Enrollment records 1

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Kaiser Permanente School of Medicine, 2008

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Edward W Sparrow Hospital AssociationGroup PAC ID 6709799166, 698 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Edward W Sparrow Hospital Hospital, Lansing, MI, CCN 230230

Medicare enrollment (NPD)

Enrolled

Credentials

Certified Registered Nurse

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.

• Edward W. Sparrow Hospital Association

  dba Sparrow CRNA Services

  • Anesthesiology Physician
  • Lansing, MI
  • NPI 1366498107

  Nurse Anesthetist, Certified Registered

  Medicare reassignment Care Compare group NPD
• Environ Anesthesia, LLC.

  • Anesthesiology Physician
  • Lexington, KY
  • NPI 1831438092

  MI

  Medicare reassignment
• Edward W Sparrow Hospital Association

  dba University of Michigan Health-Sparrow

  • Adult Health Nurse Practitioner
  • Lansing, MI
  • NPI 1265220438
  NPD

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

• Edward W Sparrow Hospital Association

  dba University of Michigan Health-Sparrow Lansing

  • General Acute Care Hospital
  • Lansing, MI
  • NPI 1073588711
  Care Compare affiliation
• Edward W Sparrow Hospital Association

  dba Thoracic Cardiovascular Institute

  • General Acute Care Hospital
  • Lansing, MI
  • NPI 1760710719
  Care Compare affiliation

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

{
    "created_epoch": "1205193600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753747200000",
    "number": "1487824942",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "215 EXETER AVE",
            "address_2": "SAN CARLOS",
            "city": "SAN CARLOS",
            "state": "CA",
            "postal_code": "940701610",
            "telephone_number": "408-679-8558"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1215 E MICHIGAN AVE",
            "city": "LANSING",
            "state": "MI",
            "postal_code": "489121811",
            "telephone_number": "408-851-6020"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BRAY",
        "first_name": "GRETA",
        "middle_name": "A.",
        "credential": "CRNA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2008-03-11",
        "last_updated": "2025-07-29",
        "certification_date": "2025-07-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MI",
            "license": "4704369772",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GRETA",
            "last_name": "WIEDEMANN",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Jagraj Singh Brar, M.D.
• Michael Brashears, LLP
• Steven Braun, MD
• Kristina Braxton
• Ashley Bray, LLMSW
• Heather Breasbois, DPT
• Breast Center of Lansing PLLC
• Kristin K Bredin, DO
• Heather Breimayer
• Catherine Shaughnessy Brennan, MS,RN,CNS

• Certified Registered Nurse Anesthetist in Lansing, MI
• Providers in Lansing, MI by specialty
• Certified Registered Nurse Anesthetist in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 29, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.