Karen Joy Sundby, M.D.

Primary specialty

MOHS-Micrographic Surgery PhysicianTaxonomy code 207ND0101X

License

41658 Issued in CO

Practice address

4700 Hale Pkwy
Suite 140
Denver, CO 80220-4050

Phone

(303) 388-8807

Fax

(720) 360-0181

NPI assigned

Jan 23, 2006

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 1

Other names 1

• Dr. Karen Joy Johnson Former name

Medicare fee-for-service enrollment

Enrolled in CO

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Micrographic Dermatologic Surgery (MDS)

Education

University of Colorado School of Medicine, Denver, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

94.03 of 100Reported as individual

Quality

89.15

Promoting interoperability

100

Improvement activities

40

Procedures performed for Medicare patients

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.

• Karen J Sundby MD, PC

  • Dermatology Physician
  • Denver, CO
  • NPI 1306028246
  Medicare reassignment NPD Authorized official
• Dermasurgery Center, P.C.

  • Procedural Dermatology Physician
  • Lancaster, PA
  • NPI 1245386556

  Mohs-Micrographic Surgery

  NPD (past)
• Dermatology Physicians Inc.

  • Dermatology Physician
  • Lancaster, PA
  • NPI 1891766424
  NPD (past)

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

{
    "created_epoch": "1137974400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1746489600000",
    "number": "1912977083",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4700 HALE PKWY",
            "address_2": "SUITE 140",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802204050",
            "telephone_number": "303-388-8807",
            "fax_number": "720-360-0181"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4700 HALE PKWY",
            "address_2": "SUITE 140",
            "city": "DENVER",
            "state": "CO",
            "postal_code": "802204050",
            "telephone_number": "303-388-8807",
            "fax_number": "720-360-0181"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SUNDBY",
        "first_name": "KAREN",
        "middle_name": "JOY",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-01-23",
        "last_updated": "2025-05-06",
        "certification_date": "2025-05-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ND0101X",
            "taxonomy_group": "",
            "desc": "Dermatology, MOHS-Micrographic Surgery",
            "state": "CO",
            "license": "41658",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RR PTAN",
            "identifier": "P00332354",
            "state": "CO"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "KAREN",
            "last_name": "JOHNSON",
            "middle_name": "JOY",
            "prefix": "DR.",
            "credential": "M.D.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Melis Sunay, NP
• Suncrest Home Health LLC
• Suncrest Home Health LLC
• Suncrest Hospice LLC
• Swathy Sundaram
• Steve R Sunderman, M.D.
• Shannon Sundita, PHARMD
• Sunflower Care Group Inc.
• Erica Sung
• Raphael Kiwon Sung, MD

• MOHS-Micrographic Surgery Physician in Denver, CO
• Providers in Denver, CO by specialty
• MOHS-Micrographic Surgery Physician in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 6, 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.