Individual provider Active NPI

Ryan Fifer Welch

  • Anesthesiologist Assistant
  • Denver, CO
National Provider Identifier
1811877939
Registry record updated Sep 8, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Anesthesiologist AssistantTaxonomy code 367H00000X
License
ANT.0000313 Issued in CO
Practice address
1719 E 19TH Ave
Denver, CO 80218-1235
Phone
(720) 754-6000
NPI assigned
Sep 8, 2025
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 8, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Anesthesiologist Assistant 367H00000X ANT.0000313 CO Primary

Addresses

Primary practice location

1719 E 19TH Ave
Denver, CO 80218-1235

Mailing address

PO Box 8225
Jackson, WY 83002-8225
Phone (307) 203-0657

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20251008001764 CO Practitioner - Anesthesiology Assistant 5294232013 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Anesthesiology Assistant
Education
Other, 2025
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
US Anesthesia Partners of Colorado IncGroup PAC ID 6002072055, 472 clinicians

Practice addresses (Care Compare)

1719 E 19TH Ave
Presbyterian St Lukes Medical Cente
Denver, CO 80218-1235
Phone (303) 438-3999

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Associate of Arts

Practice roles

OrganizationSpecialtyStatusNew patients
US Anesthesia Partners of Colorado Inc. Anesthesiologist Assistant CurrentSince Sep 24, 2025 Accepting new patients

Locations

1719 E 19th Ave
Denver, CO 80218
Phone (303) 839-6000

8000 E Maplewood Ave
Ste 120
Greenwood Village, CO 80111

10101 Ridgegate Pkwy
Lone Tree, CO 80124
Phone (720) 225-1000

Organizations & group practices 1

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 3

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": "1757289600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757289600000",
    "number": "1811877939",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 8225",
            "city": "JACKSON",
            "state": "WY",
            "postal_code": "830028225",
            "telephone_number": "307-203-0657"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1719 E 19TH AVE",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802181235",
            "telephone_number": "720-754-6000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WELCH",
        "first_name": "RYAN",
        "middle_name": "FIFER",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-09-08",
        "last_updated": "2025-09-08",
        "certification_date": "2025-09-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367H00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiologist Assistant",
            "state": "CO",
            "license": "ANT.0000313",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Denver, CO

Sources for this page

  • 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.
  • 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.