Megan J Brennan, CRNA

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

2019012309 Issued in MO

Practice address

3015 N Ballas Rd
Saint Louis, MO 63131-2329

Phone

(314) 996-5000

NPI assigned

Apr 8, 2019

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other names 1

• Megan Thielemier Former name

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in MO, AZ2 enrollments

Enrollment records 2

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mayo Clinic ArizonaGroup PAC ID 7012829930, 1,618 clinicians

Metro-West Anesthesia Group IncGroup PAC ID 2163329921, 204 clinicians

Missouri Baptist Medical CenterGroup PAC ID 3476461955, 123 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Missouri Baptist Medical Center Hospital, Saint Louis, MO, CCN 260108

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 and National Provider Directory roles.

• Metro-West Anesthesia Group Inc

  • Anesthesiology Physician
  • Chesterfield, MO
  • NPI 1245427335
  Medicare reassignment Care Compare group NPD
• Missouri Baptist Medical Center

  • Anesthesiology Physician
  • Saint Louis, MO
  • NPI 1609658905
  Medicare reassignment Care Compare group NPD
• Mayo Clinic Arizona

  • Multi-Specialty Clinic/Center
  • Scottsdale, AZ
  • NPI 1558332494
  Medicare reassignment Care Compare group NPD
• Ambulatory Anesthesia Services of St. Charles, LLC

  • Anesthesiology Physician
  • Saint Peters, MO
  • NPI 1467634097
  Medicare reassignment NPD
• Mayo Clinic Arizona

  • Durable Medical Equipment & Medical Supplies
  • Phoenix, AZ
  • NPI 1699520049
  NPD

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

• Missouri Baptist Medical Center

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1487663506
  Care Compare affiliation

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

{
    "created_epoch": "1554681600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786406400000",
    "number": "1508329525",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3015 N BALLAS RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631312329",
            "telephone_number": "314-996-5000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3015 N BALLAS RD",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631312329",
            "telephone_number": "314-996-5000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "6420 Clayton Rd",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631171811",
            "country_code": "US",
            "telephone_number": "314-768-8442",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "13400 E Shea Blvd",
            "address_purpose": "LOCATION",
            "city": "Scottsdale",
            "state": "AZ",
            "postal_code": "852595499",
            "country_code": "US",
            "telephone_number": "480-301-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BRENNAN",
        "first_name": "MEGAN",
        "middle_name": "J",
        "credential": "CRNA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-04-08",
        "last_updated": "2026-08-11",
        "certification_date": "2026-08-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "AZ",
            "license": "298289",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MO",
            "license": "2019012309",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "endpointDescription": "BJC",
            "affiliationName": "MISSOURI BAPTIST MEDICAL CENTER",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "3015 N Ballas Rd",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631312329",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "MEGAN",
            "last_name": "THIELEMIER",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• James Michael Brennan, M.D.
• Karli Brennan
• Kathryn Nicole Brennan
• Lisa Maisch Brennan, PTA
• Martha Brennan, M.A
• Richard Xavier Brennan, M.D.
• Robert Alexis Brennan, M.D.
• Steven K Brennan, MD
• Melissa Brennecke
• Miranda Lynn Brennecke, LCSW

• Certified Registered Nurse Anesthetist in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Certified Registered Nurse Anesthetist in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 11, 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.