Margaret Isabel Thirston, M.D.

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

036114092 Issued in IL

Practice address

3301 Broadway St
Quincy, IL 62301-3713

Phone

(217) 277-4090

NPI assigned

Jan 17, 2008

Last updated

Sep 29, 2026By the provider in NPPES

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Other identifiers 4

Other names 1

• Margaret Isabel Williams-Thirston Former name

Medicare fee-for-service enrollment

Enrolled in FL, IL, AL3 enrollments

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 3

Specialty

Anesthesiology

Education

R Franklin University of Med & Sci/Chicago Medical School, 2002

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Physynergy LLCGroup PAC ID 6204081292, 51 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Crestwood Medical Center Hospital, Huntsville, AL, CCN 010131
• Huntsville Hospital Hospital, Huntsville, AL, CCN 010039

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.

• Physynergy, LLC

  • Anesthesiology Physician
  • Huntsville, AL
  • NPI 1134465560
  Medicare reassignment Care Compare group NPD
• G & G Anesthesia LLC

  • Certified Registered Nurse Anesthetist
  • Maryville, IL
  • NPI 1487020111
  Medicare reassignment NPD
• Ams of Crestview LLC

  • Anesthesiology Physician
  • Pensacola, FL
  • NPI 1588927982
  Medicare reassignment NPD
• Physynergy, LLC

  • Anesthesiology Physician
  • Mobile, AL
  • NPI 1093173502
  NPD
• Hospital Authority of the City of Bainbridge and Decatur County

  dba Memorial Hospital and Manor

  • Multi-Specialty Clinic/Center
  • Bainbridge, GA
  • NPI 1053388256
  NPD (past)
• Jennifer Sassi PA

  • Certified Registered Nurse Anesthetist
  • Fort Myers, FL
  • NPI 1619305067
  NPD (past)
• Rinehart Brothers Incorporated

  dba First Choice Physical Therapy

  • Physical Therapist
  • Lynn Haven, FL
  • NPI 1982630232
  NPD (past)

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

• Crestwood Healthcare LP

  dba Crestwood Medical Center

  • General Acute Care Hospital
  • Huntsville, AL
  • NPI 1023061496
  Care Compare affiliation
• The Health Care Authority of the City of Huntsville

  dba Huntsville Hospital

  • General Acute Care Hospital
  • Huntsville, AL
  • NPI 1447221056
  Care Compare affiliation

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

{
    "created_epoch": "1200528000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790640000000",
    "number": "1114103330",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1025 MAINE ST",
            "city": "QUINCY",
            "state": "IL",
            "postal_code": "623014096",
            "telephone_number": "217-222-6550"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3301 BROADWAY ST",
            "city": "QUINCY",
            "state": "IL",
            "postal_code": "623013713",
            "telephone_number": "217-277-4090"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "THIRSTON",
        "first_name": "MARGARET",
        "middle_name": "ISABEL",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2008-01-17",
        "last_updated": "2026-09-29",
        "certification_date": "2023-06-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "FL",
            "license": "ME100633",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "IL",
            "license": "036114092",
            "primary": true
        },
        {
            "code": "207LP2900X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pain Medicine",
            "state": "FL",
            "license": "ME100633",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BCBSFL",
            "identifier": "12376",
            "state": "FL"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "2803569 00",
            "state": "FL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "4258872",
            "state": "FL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TRIWEST",
            "identifier": "1114103",
            "state": "FL"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARGARET",
            "last_name": "WILLIAMS-THIRSTON",
            "middle_name": "ISABEL",
            "credential": "M.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Elizabeth Terwelp, PA-C
• Tessa Johnson, DDS (Quincy Family Dental Care)
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• Seth Cameron Thibodeau, D.O.
• Jaclyn Marie Thobaben, PA-C
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• Thomas R Westerhoff M.D P.C.
• Robert Thomas, DO
• Cailey Brooke Thompson, CRNA

• Anesthesiology Physician in Quincy, IL
• Providers in Quincy, IL by specialty
• Anesthesiology Physician in Illinois

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 29, 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.