Aaron Yosef Lessen

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

DR.0046304 Issued in CO

Practice address

501 E Hampden Ave
Englewood, CO 80113-2702

Phone

(303) 788-6911

Fax

(303) 306-7753

NPI assigned

Dec 27, 2007

Sex

Male

Sole proprietor

No

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

Specialties & licenses 4

Addresses

Other identifiers 2

Other names 1

• Aaron Y. Lessen Professional name

Medicare fee-for-service enrollment

Enrolled in CO, NM2 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

Emergency Medicine

Education

University of Pittsburgh School of Medicine, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Carepoint Emergency Medicine, PLLCGroup PAC ID 7810291432, 160 clinicians

Gunnison Valley HospitalGroup PAC ID 8426040486, 81 clinicians

San Juan Regional Medical Center, Inc.Group PAC ID 4587559505, 233 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• HCA-Healthone Dba Swedish Medical Center Hospital, Englewood, CO, CCN 060034
• San Juan Regional Medical Center Inc Hospital, Farmington, NM, CCN 320005
• Gunnison Valley Hospital Hospital, Gunnison, CO, CCN 061320

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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.

• Carepoint Emergency Medicine, PLLC

  • Emergency Medicine Physician
  • Denver, CO
  • NPI 1134590318
  Medicare reassignment Care Compare group NPD
• Gunnison Valley Hospital

  • Critical Access Hospital
  • Gunnison, CO
  • NPI 1932109048
  Medicare reassignment Care Compare group NPD
• San Juan Regional Medical Center Inc

  • Gastroenterology Physician
  • Farmington, NM
  • NPI 1639662901
  Medicare reassignment Care Compare group
• Carepoint P.C.

  • Emergency Medicine Physician
  • Denver, CO
  • NPI 1275516346
  Medicare reassignment NPD
• Gunnison Valley Hospital

  • Professional Counselor
  • Gunnison, CO
  • NPI 1124802061
  NPD
• Gunnison Valley Hospital

  • Urgent Care Clinic/Center
  • Gunnison, CO
  • NPI 1477361228
  NPD
• Gunnison Valley Hospital

  • Primary Care Clinic/Center
  • Gunnison, CO
  • NPI 1578997284
  NPD
• San Juan Regional Medical Center Inc

  • Emergency Medicine Physician
  • Farmington, NM
  • NPI 1518932151
  NPD
• San Juan Regional Medical Center Inc

  • Family Medicine Physician
  • Farmington, NM
  • NPI 1710589015
  NPD

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

• Gunnison Valley Hospital

  • Urgent Care Clinic/Center
  • Crested Butte, CO
  • NPI 1134754153

  Hospital

  Care Compare affiliation
• Gunnison Valley Hospital

  • Critical Access Hospital
  • Gunnison, CO
  • NPI 1932109048
  Care Compare affiliation
• HCA Healthone LLC

  • General Acute Care Hospital
  • Englewood, CO
  • NPI 1396790200
  Care Compare affiliation
• San Juan Regional Medical Center Inc

  • Rehabilitation Hospital Unit
  • Farmington, NM
  • NPI 1326663592
  Care Compare affiliation
• San Juan Regional Medical Center, Inc.

  • General Acute Care Hospital
  • Farmington, NM
  • NPI 1427058510
  Care Compare affiliation

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

{
    "created_epoch": "1198713600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763942400000",
    "number": "1457535346",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 173862",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802173862",
            "telephone_number": "303-306-7783",
            "fax_number": "303-306-7753"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "501 E HAMPDEN AVE",
            "city": "ENGLEWOOD",
            "state": "CO",
            "postal_code": "801132702",
            "telephone_number": "303-788-6911",
            "fax_number": "303-306-7753"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "801 W Maple St",
            "address_purpose": "LOCATION",
            "city": "Farmington",
            "state": "NM",
            "postal_code": "874015630",
            "country_code": "US",
            "telephone_number": "505-609-2000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LESSEN",
        "first_name": "AARON",
        "middle_name": "YOSEF",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-12-27",
        "last_updated": "2025-11-24",
        "certification_date": "2025-11-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CO",
            "license": "46304",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CO",
            "license": "DR.0046304",
            "primary": true
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NM",
            "license": "MD2025-0938",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "AZ",
            "license": "37825",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "97485870",
            "state": "CO"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P00637700",
            "state": "CO"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "AARON",
            "last_name": "LESSEN",
            "middle_name": "Y.",
            "credential": "MD",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

• Kent Lemburg, M.T.
• Aaron Leo, LPC
• Leon F Miller OD PC
• Matthew Thomas Lescroart, LPC
• Lauren Lesnoy
• Jaren Kane Lesser, PT, DPT
• Anna Davis Lessman
• Colin Lesyinski, LPCC
• Robert James Letendre Jr., PT
• Level Up Health Chiropractic

• Emergency Medicine Physician in Englewood, CO
• Providers in Englewood, CO by specialty
• Emergency Medicine Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 24, 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.