Cyrene D Grothaus-Day, MD

Primary specialty

Pediatric Anesthesiology PhysicianTaxonomy code 207LP3000X

License

2003019558 Issued in MO

Practice address

1378 Mosswoods Dr
Fenton, MO 63026-7226

Phone

(636) 861-1676

NPI assigned

Jul 14, 2006

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 identifiers 3

Medicare fee-for-service enrollment

Enrolled in MO, IL2 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 2

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Resource Anesthesiology Associates of Mo LLC

  • Anesthesiology Physician
  • Sikeston, MO
  • NPI 1396116521
  Medicare reassignment NPD
• Northstar Anesthesia of Illinois, LLC

  • Anesthesiology Physician
  • Arlington, TX
  • NPI 1962822395

  IL

  Medicare reassignment NPD
• Broad Midwest Anesthesia, LLC

  • Anesthesiology Physician
  • Saint Louis, MO
  • NPI 1376705848
  NPD (past)
• Granite Peak Anesthesiology Consultants

  • Anesthesiology Physician
  • Billings, MT
  • NPI 1700637907
  NPD (past)
• HSHS Medical Group Inc

  • Rural Health Clinic/Center
  • Rushville, IL
  • NPI 1487719480
  NPD (past)

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

{
    "created_epoch": "1152835200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757289600000",
    "number": "1407872625",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "335 DAVIS DR",
            "city": "HOLTS SUMMIT",
            "state": "MO",
            "postal_code": "650432135",
            "telephone_number": "561-320-2958"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1378 MOSSWOODS DR",
            "city": "FENTON",
            "state": "MO",
            "postal_code": "630267226",
            "telephone_number": "636-861-1676"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GROTHAUS-DAY",
        "first_name": "CYRENE",
        "middle_name": "D",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-07-14",
        "last_updated": "2025-09-08",
        "certification_date": "2025-09-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207LP3000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pediatric Anesthesiology",
            "state": "MO",
            "license": "2003019558",
            "primary": true
        },
        {
            "code": "207LP3000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pediatric Anesthesiology",
            "state": "IL",
            "license": "036-126419",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "204893622",
            "state": "MO"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "036126419",
            "state": "IL"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MO-BLUE SHIELD",
            "identifier": "336",
            "state": null
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Mark A Greaves, RPH
• Matthew Austin Green, MPT
• Mark W Grimm, M.D.
• Laura Elizabeth Grimmer, MD
• Madison Elise Grohne, PHARMD
• Guardian Pharmacy of St. Louis, LLC
• Daniel Guerra, DMD
• Kristen Guilander, RD, LD
• Courtney Haas, DNP
• Natasja Haffner, LMSW

• Pediatric Anesthesiology Physician in Fenton, MO
• Providers in Fenton, MO by specialty
• Pediatric Anesthesiology Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 8, 2025; 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.