Rachel Lynn Guess, MD

Primary specialty

Pediatric Rheumatology PhysicianTaxonomy code 2080P0216X

License

2022025250 Issued in MO

Practice address

1 Childrens PL
Div Ped Rheumatology
Saint Louis, MO 63110-1002

Phone

(314) 454-6124

Fax

(844) 616-1418

NPI assigned

Apr 30, 2018

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 1

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in TX, MO2 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

Specialty

Pediatric MedicineAlso: Rheumatology

Education

University of Texas Medical School at San Antonio, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Washington UniversityGroup PAC ID 9830008770, 2,968 clinicians

Practice addresses (Care Compare)

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.

• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1194765685
  Medicare reassignment Care Compare group NPD
• Dell Children'S Medical Group

  • Pediatrics Physician
  • Austin, TX
  • NPI 1326072943
  Medicare reassignment NPD
• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1962442475
  NPD
• Dell Children'S Medical Group

  • Sleep Disorder Diagnostic Clinic/Center
  • Austin, TX
  • NPI 1124748249
  NPD
• Ozarks Medical Center

  • General Acute Care Hospital
  • West Plains, MO
  • NPI 1831115641
  NPD (past)
• Washington University

  • Multi-Specialty Clinic/Center
  • Saint Louis, MO
  • NPI 1134169568
  NPD (past)

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

{
    "created_epoch": "1525046400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755043200000",
    "number": "1629566278",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7412011",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606742011",
            "telephone_number": "314-454-6124",
            "fax_number": "844-616-1418"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 CHILDRENS PL",
            "address_2": "DIV PED RHEUMATOLOGY",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631101002",
            "telephone_number": "314-454-6124",
            "fax_number": "844-616-1418"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUESS",
        "first_name": "RACHEL",
        "middle_name": "LYNN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-04-30",
        "last_updated": "2025-08-13",
        "certification_date": "2022-07-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "MO",
            "license": "2022025250",
            "primary": false
        },
        {
            "code": "2080P0216X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Rheumatology",
            "state": "MO",
            "license": "2022025250",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "200112918",
            "state": "MO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "1 Childrens Pl",
            "address_2": "Div Ped Rheumatology",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631101002",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Kathleen N. Guerrein, NP
• Jessenia Christine Guerrero, M.D.
• Shawntae Akila Guerrier, HS1
• Rejean Michael Guerriero, DO
• Lori Guess
• Sarah Michelle Guess, MD
• Daniel Philip Guest, MA, CPS
• Lawanda Guest
• Margaret M Guest, PH.D.
• Yovounka Guest

• Pediatric Rheumatology Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Pediatric Rheumatology Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 13, 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.
• 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.