Windsor Dermatology, PLLC

Primary specialty

Dermatology PhysicianTaxonomy code 207N00000X

Legal business name

WINDSOR DERMATOLOGY, PLLC

Doing business as

Larsen Dermatology Institute

Practice address

2121 E Harmony Rd Unit 310
Fort Collins, CO 80528-3403

Phone

(970) 667-0304

Fax

(970) 669-5153

NPI assigned

Sep 3, 2026

Organization subpart

Yes

Parent organization

WINDSOR DERMATOLOGY, PLLCAs reported in NPPES

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

Authorized official

Name

Dr. Ammon Jean Larsen, MD

Title

Owner

Phone

(970) 667-0304

Specialties & licenses 1

Addresses

Other names 1

• Larsen Dermatology Institute Doing business as

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

• Windsor Dermatology, PLLC

  • Dermatology Physician
  • Loveland, CO
  • NPI 1770420275
  NPPES parent name

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

{
    "created_epoch": "1788393600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1788393600000",
    "number": "1336058684",
    "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": "2121 E HARMONY RD UNIT 310",
            "city": "FORT COLLINS",
            "state": "CO",
            "postal_code": "805283403",
            "telephone_number": "970-667-0304",
            "fax_number": "970-669-5153"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "WINDSOR DERMATOLOGY, PLLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "WINDSOR DERMATOLOGY, PLLC",
        "enumeration_date": "2026-09-03",
        "last_updated": "2026-09-03",
        "certification_date": "2026-09-03",
        "status": "A",
        "authorized_official_last_name": "LARSEN",
        "authorized_official_first_name": "AMMON",
        "authorized_official_middle_name": "JEAN",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "970-667-0304",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207N00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Dermatology",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Larsen Dermatology Institute",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

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• Dermatology Physician in Fort Collins, CO
• Providers in Fort Collins, CO by specialty
• Dermatology Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 3, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.