NPIMap

Individual provider Active NPI

Ammon Larsen, M.D.

  • Dermatology Physician
  • Loveland, CO
National Provider Identifier
1982044012
Registry record updated Sep 3, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Dermatology PhysicianTaxonomy code 207N00000X
License
0058495 Issued in CO
Practice address
4025 St Cloud Dr Ste 110
Loveland, CO 80538-8960
Phone
(970) 667-0304
Fax
(970) 669-5153
NPI assigned
Jul 3, 2013
Last updated
Sep 3, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 3, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Procedural Dermatology Physician 207NS0135X 0058495 CO
Dermatology Physician 207N00000X 0058495 CO Primary

Addresses

Primary practice location

4025 St Cloud Dr Ste 110
Loveland, CO 80538-8960

Mailing address

4025 St Cloud Dr Ste 110
Loveland, CO 80538-8960
Phone (970) 667-0304

Other practice location 1

2121 E Harmony Rd Unit 310
Fort Collins, CO 80528-3403
Phone (970) 667-0304

Other practice location 2

1405 S 8th Ave Ste 102
Sterling, CO 80751-4560
Phone (970) 800-9330

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
I20170703000738 CO Practitioner - Dermatology 0749559961 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Dermatology
Education
Pennsylvania State University College of Medicine, 2013
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1405 S 8TH Ave
Suite 102
Sterling, CO 80751-4560
Phone (970) 800-9330

3451 Mountain Lion Dr
Loveland, CO 80537-8817
Phone (970) 800-9330

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
75 of 100Reported as group

Procedures performed for Medicare patients

ProcedureNumber of procedures
Melanoma (skin cancer) excision36
Removal of skin lesions2172
Removal of nail tissue1-10
Removal or shaving of skin growth23
Skin biopsy521

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
0058495COMDDermatology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Monarch Dermatology & Surgery, LLC Dermatology CurrentSince Mar 1, 2020 Accepting new patients
Monarch Dermatology & Surgery LLC Dermatology Current Accepting new patients
Windsor Dermatology, PLLC Dermatology Current Accepting new patients
Windsor Dermatology, PLLC Dermatology Past Accepting new patients
Windsor Dermatology, PLLC Dermatology Past Accepting new patients

Locations

1615 Foxtrail Dr
Ste 100
Loveland, CO 80538
Phone (303) 831-7419

3451 Mountain Lion Dr
Loveland, CO 80537
Phone (970) 800-9330

4025 St Cloud Dr
Ste 110
Loveland, CO 80538
Phone (717) 480-2132

1405 S 8th Ave
Ste 102
Sterling, CO 80751
Phone (970) 522-0591

Interoperability endpoints

  • FHIR API: https://app.meldrx.com/api/fhir/ez_00209

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 18

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

View all 18

NPI Registry JSON

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

{
    "created_epoch": "1372809600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788393600000",
    "number": "1982044012",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4025 ST CLOUD DR STE 110",
            "city": "LOVELAND",
            "state": "CO",
            "postal_code": "805388960",
            "telephone_number": "970-667-0304",
            "fax_number": "970-669-5153"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4025 ST CLOUD DR STE 110",
            "city": "LOVELAND",
            "state": "CO",
            "postal_code": "805388960",
            "telephone_number": "970-667-0304",
            "fax_number": "970-669-5153"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2121 E Harmony Rd Unit 310",
            "address_purpose": "LOCATION",
            "city": "Fort Collins",
            "state": "CO",
            "postal_code": "805283403",
            "country_code": "US",
            "telephone_number": "970-667-0304",
            "fax_number": "970-669-5153",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1405 S 8th Ave Ste 102",
            "address_purpose": "LOCATION",
            "city": "Sterling",
            "state": "CO",
            "postal_code": "807514560",
            "country_code": "US",
            "telephone_number": "970-800-9330",
            "fax_number": "720-927-4301",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LARSEN",
        "first_name": "AMMON",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-07-03",
        "last_updated": "2026-09-03",
        "certification_date": "2026-09-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207NS0135X",
            "taxonomy_group": "",
            "desc": "Dermatology, Procedural Dermatology",
            "state": "CO",
            "license": "0058495",
            "primary": false
        },
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "CO",
            "license": "0058495",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Loveland, CO

Sources for this page

Verify at the official NPI Registry.