Individual provider Active NPI

Angela Ann Williamson, CRNA

  • Certified Registered Nurse Anesthetist
  • Saginaw, MI
National Provider Identifier
1659676286
Registry record updated Mar 4, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Certified Registered Nurse AnesthetistTaxonomy code 367500000X
License
4704232882 Issued in MI
Practice address
1447 N Harrison St
Saginaw, MI 48602-4727
Phone
(989) 583-6237
Fax
(989) 583-6032
NPI assigned
Jan 12, 2011
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 4, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Certified Registered Nurse Anesthetist 367500000X APRN11044540 FL
Certified Registered Nurse Anesthetist 367500000X 4704232882 MI Primary

Addresses

Primary practice location

1447 N Harrison St
Saginaw, MI 48602-4727

Mailing address

1447 N Harrison St
Saginaw, MI 48602-4727
Phone (989) 583-6237

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MI, SC, FL3 enrollments

Enrollment records 3

Enrollment IDStateProvider typePAC IDDetails
I20110414000641 MI Practitioner - Certified Registered Nurse Anesthetist (Crna) 6305020413 Reassigns benefits to 3 organizations
I20250122002340 SC Practitioner - Certified Registered Nurse Anesthetist (Crna) 6305020413 Reassigns benefits to 1 organization
I20260304004366 FL Practitioner - Certified Registered Nurse Anesthetist (Crna) 6305020413 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Certified Registered Nurse Anesthetist (Crna)
Education
Other, 2010
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mymichigan Medical Center AlpenaGroup PAC ID 8527969922, 97 clinicians
Mymichigan Medical Center MidlandGroup PAC ID 2264323633, 507 clinicians
Covenant Medical Center, Inc.Group PAC ID 2769387778, 488 clinicians
US Anesthesia Partners of Florida IncGroup PAC ID 0345143152, 1,111 clinicians

Practice addresses (Care Compare)

1501 W Chisholm St
Alpena, MI 49707-1401
Phone (989) 356-7390

4000 Wellness Dr
Midland, MI 48670-2000
Phone (989) 839-3000

700 Cooper Ave
Saginaw, MI 48602-5383
Phone (989) 791-0452

9981 S Healthpark Dr
Fort Myers, FL 33908-3618
Phone (394) 337-7992

Hospital & facility affiliations

  • Mymichigan Medical Center Midland Hospital, Midland, MI, CCN 230222
  • Lee Memorial Hospital Hospital, Fort Myers, FL, CCN 100012
  • Mymichigan Medical Center Alpena Hospital, Alpena, MI, CCN 230036
  • Cape Coral Hospital Hospital, Cape Coral, FL, CCN 100244
  • Covenant Medical Center Hospital, Saginaw, MI, CCN 230070

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

State licenses

LicenseStateTypeSpecialty
APRN11044540FLMDCertified Registered Nurse Anesthetist

Practice roles

OrganizationSpecialtyStatusNew patients
Joseph a. Houle MD PC Current Accepting new patients
Medical University Hospital Authority CurrentSince Jan 2, 2025 Accepting new patients
Mymichigan Medical Center Alpena CurrentSince Jun 1, 2025 Accepting new patients
US Anesthesia Partners of Florida Inc. Nurse Anesthetist, Certified Registered CurrentSince Feb 20, 2026 Accepting new patients
Mymichigan Medical Center Alpena Nurse Anesthetist, Certified Registered CurrentSince Jun 1, 2025 Accepting new patients
Mymichigan Medical Center Midland CurrentSince Mar 19, 2024 Accepting new patients
Mymichigan Medical Center Alpena Current Accepting new patients
Medical University Hospital Authority Nurse Anesthetist, Certified Registered CurrentSince Jan 2, 2025 Accepting new patients
Covenant Medical Center, Inc. Nurse Anesthetist, Certified Registered CurrentSince Jan 18, 2011 Accepting new patients
Mymichigan Medical Center Midland Nurse Anesthetist, Certified Registered CurrentSince Mar 19, 2024 Accepting new patients
Covenant Medical Center, Inc CurrentSince Jan 18, 2011 Accepting new patients

Locations

9981 S Healthpark Dr
Fort Myers, FL 33908
Phone (239) 332-5344

851 Trafalgar Ct
Ste 200E
Maitland, FL 32751
Phone (321) 422-7155

1501 W Chisholm St
Alpena, MI 49707
Phone (989) 356-7000

4000 Wellness Dr
Midland, MI 48670
Phone (844) 832-1956

700 Cooper Ave
Saginaw, MI 48602
Phone (989) 583-6000

1447 N Harrison St
Saginaw, MI 48602
Phone (989) 583-4220

L4355
Columbus, OH 43260

171 Ashley Ave
Charleston, SC 29425
Phone (843) 792-2123

Organizations & group practices 11

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.

Hospital & facility affiliations 9

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

NPI Registry JSON

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

{
    "created_epoch": "1294790400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772582400000",
    "number": "1659676286",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1447 N HARRISON ST",
            "city": "SAGINAW",
            "state": "MI",
            "postal_code": "486024727",
            "telephone_number": "989-583-6237",
            "fax_number": "989-583-6032"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1447 N HARRISON ST",
            "city": "SAGINAW",
            "state": "MI",
            "postal_code": "486024727",
            "telephone_number": "989-583-6237",
            "fax_number": "989-583-6032"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "ANGELA",
        "middle_name": "ANN",
        "credential": "CRNA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2011-01-12",
        "last_updated": "2026-03-04",
        "certification_date": "2026-03-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "FL",
            "license": "APRN11044540",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MI",
            "license": "4704232882",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Saginaw, MI

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 4, 2026; 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.