Organization Active NPI

Hillside Dermatology PC

  • Dermatology Physician
  • Agawam, MA
National Provider Identifier
1669126546
Registry record updated May 5, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Dermatology PhysicianTaxonomy code 207N00000X
Legal business name
HILLSIDE DERMATOLOGY PC
Practice address
200 Silver Street Suite 106
Agawam, MA 01001-3065
Phone
(413) 341-5350
Fax
(413) 341-5335
NPI assigned
Feb 9, 2022
Organization subpart
No

NPPES NPI Registry

Updated by the provider on May 5, 2026

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

Authorized official

Name
Dr. Mark Skalski, MD
Title
President
Phone
(413) 341-5350

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Dermatology PhysicianGroup: 193400000X SINGLE SPECIALTY GROUP 207N00000X Primary

Addresses

Primary practice location

200 Silver Street Suite 106
Agawam, MA 01001-3065

Mailing address

200 Silver St Unit 106
Agawam, MA 01001-3067
Phone (413) 341-5350

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20220707001217 MA Part B Supplier - Clinic/Group Practice 3971983073 Receives reassigned benefits from 7 practitioners
Practice locations: Agawam, MA

Laboratory certificates & supplier records

Derived by NPIMap

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

CLIA numberLaboratoryCertificateExpires
22D2272383Hillside Dermatology PC200 Silver St, Agawam, MA 01001Certificate of waiverNov 18, 2026

National Provider Directory

National Provider Directory

Practitioners & affiliated clinicians

Practitioners 7

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1644364800000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1777939200000",
    "number": "1669126546",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 SILVER ST UNIT 106",
            "city": "AGAWAM",
            "state": "MA",
            "postal_code": "010013067",
            "telephone_number": "413-341-5350",
            "fax_number": "413-341-5335"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 SILVER STREET SUITE 106",
            "city": "AGAWAM",
            "state": "MA",
            "postal_code": "010013065",
            "telephone_number": "413-341-5350",
            "fax_number": "413-341-5335"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "HILLSIDE DERMATOLOGY PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2022-02-09",
        "last_updated": "2026-05-05",
        "certification_date": "2026-05-05",
        "status": "A",
        "authorized_official_last_name": "SKALSKI",
        "authorized_official_first_name": "MARK",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "413-341-5350",
        "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": []
}

Other providers in Agawam, MA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • 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.