NPIMap

Individual provider Active NPI

Seth Allen Mathern, M.D.

  • Hospitalist Physician
  • Denver, CO
National Provider Identifier
1972998110
Registry record updated Sep 4, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
DR.0060603 Issued in CO
Practice address
2525 S Downing St
Denver, CO 80210-5817
Phone
(303) 673-7151
NPI assigned
Apr 4, 2015
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 4, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hospitalist Physician 208M00000X DR.0060603 CO Primary
Family Medicine Physician 207Q00000X DR.0060603 CO

Addresses

Primary practice location

2525 S Downing St
Denver, CO 80210-5817

Mailing address

PO Box 911057
Denver, CO 80291-1057
Phone (888) 269-7001

Other practice location 1

14300 Orchard Pkwy
Westminster, CO 80023-9206
Phone (720) 627-3761

Other practice location 2

13001 E 17th Pl
Aurora, CO 80045-2570
Phone (720) 848-9096

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CO
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20180814001018 CO Practitioner - HospitalistPractitioner - Family PracticePractitioner - Emergency Medicine 2365755394 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
HospitalistAlso: Emergency Medicine, Family Practice
Education
Columbia University College of Physicians and Surgeons, 2015
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Catholic Health Initiatives ColoradoGroup PAC ID 8022927342, 1,230 clinicians
Portercare Adventist Health SystemGroup PAC ID 0941110886, 770 clinicians

Practice addresses (Care Compare)

14300 Orchard Pkwy
Westminster, CO 80023-9206
Phone (720) 627-3761

2525 S Downing St
Denver, CO 80210-5817

2535 D S Downing St
Suite 460
Denver, CO 80210-5817
Phone (303) 744-1065

2535 S Downing St
Denver, CO 80210-5850
Phone (303) 778-5797

Hospital & facility affiliations

  • Centura Health-St Anthony North Health Campus Hospital, Westminster, CO, CCN 060104
  • AdventHealth Porter Hospital, Denver, CO, CCN 060064
  • St Elizabeth Hospital Hospital, Fort Morgan, CO, CCN 060044
  • AdventHealth Parker Hospital, Parker, CO, CCN 060114
  • St Anthony Summit Medical Center Hospital, Frisco, CO, CCN 060118

Merit-based Incentive Payment System (MIPS)

Final score
85.96 of 100Reported as group
Quality
78.58
Promoting interoperability
100
Improvement activities
40
Cost
74.61

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
Portercare Adventist Health System CurrentSince Oct 1, 2019 Accepting new patients
Catholic Health Initiatives Colorado CurrentSince Aug 1, 2018 Accepting new patients
Catholic Health Initiatives Colorado Current Accepting new patients
Portercare Adventist Health System Current Accepting new patients
Catholic Health Initiatives Colorado CurrentSince Aug 1, 2018 Accepting new patients
Portercare Adventist Health System Family Medicine CurrentSince Oct 1, 2019 Accepting new patients

Locations

9100 E Mineral Cir
Centennial, CO 80112
Phone (303) 561-5193

2525 S Downing St
Denver, CO 80210
Phone (303) 744-2706

7750 S Broadway
Ste 260
Littleton, CO 80122
Phone (303) 734-8650

7700 S Broadway
Littleton, CO 80122
Phone (303) 269-4786

2551 W 84th Ave
Westminster, CO 80031
Phone (303) 202-1280

41 State Highway 67
Woodland Park, CO 80863
Phone (719) 686-0551

401 E Spruce St
Garden City, KS 67846
Phone (620) 272-2222

Interoperability endpoints

  • Direct secure messaging: smathern1826339@adventhealth.direct-ci.com

Organizations & group practices 6

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 15

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

View all 15

NPI Registry JSON

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

{
    "created_epoch": "1428105600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756944000000",
    "number": "1972998110",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 911057",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802911057",
            "telephone_number": "888-269-7001",
            "fax_number": "303-764-6640"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2525 S DOWNING ST",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802105817",
            "telephone_number": "303-673-7151"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "14300 Orchard Pkwy",
            "address_purpose": "LOCATION",
            "city": "Westminster",
            "state": "CO",
            "postal_code": "800239206",
            "country_code": "US",
            "telephone_number": "720-627-3761",
            "fax_number": "720-627-3758",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "13001 E 17th Pl",
            "address_purpose": "LOCATION",
            "city": "Aurora",
            "state": "CO",
            "postal_code": "800452570",
            "country_code": "US",
            "telephone_number": "720-848-9096",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MATHERN",
        "first_name": "SETH",
        "middle_name": "ALLEN",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-04-04",
        "last_updated": "2025-09-04",
        "certification_date": "2025-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CO",
            "license": "DR.0060603",
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CO",
            "license": "DR.0060603",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Denver, CO

Sources for this page

Verify at the official NPI Registry.