Siobhan Harder, APRN

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

6307 Issued in CT

Practice address

147 Westbrook Rd
Essex, CT 06426-1512

Phone

(860) 358-5065

Fax

(860) 358-8653

NPI assigned

Sep 3, 2015

Last updated

Feb 5, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CT

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2015

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

MHS Primary Care, Inc.Group PAC ID 4082507371, 180 clinicians

Middlesex HospitalGroup PAC ID 5092611731, 231 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Middlesex Hospital Hospital, Middletown, CT, CCN 070020

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: sharder14756@middlesexhealthprd.direct-ci.com

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.

• MHS Primary Care, Inc

  • Family Medicine Physician
  • Middletown, CT
  • NPI 1336279058
  Medicare reassignment Care Compare group NPD
• Middlesex Hospital

  dba Middlesex Hospital dba Middlesex Hospital Physician Services

  • Family Nurse Practitioner
  • Middletown, CT
  • NPI 1972563138
  Medicare reassignment Care Compare group NPD
• Trinity Health of New England Provider Network Organization Inc

  dba Trinity Health Of New England Medical Group

  • Internal Medicine Physician
  • Hartford, CT
  • NPI 1003882812
  Medicare reassignment NPD
• MHS Primary Care Inc

  dba Middlesex Health Concierge Medicine

  • Internal Medicine Physician
  • Essex, CT
  • NPI 1750276655
  NPD
• MHS Primary Care, Inc

  dba Chester Family Physicians

  • Family Medicine Physician
  • Chester, CT
  • NPI 1962626630
  NPD
• Middlesex Hospital

  dba Middlesex Hospital Homecare and Hospice

  • Community Based Hospice Care Agency
  • Middletown, CT
  • NPI 1003873233
  NPD
• Trinity Health of New England Provider Network Organization Inc

  dba Trinity Health Of New England Medical Group

  • Internal Medicine Physician
  • Waterville, ME
  • NPI 1134779531
  NPD
• Middlesex Hospital

  • General Acute Care Hospital
  • Middletown, CT
  • NPI 1760454334
  NPD (past)

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

• Middlesex Hospital

  • General Acute Care Hospital
  • Middletown, CT
  • NPI 1760454334
  Care Compare affiliation

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

{
    "created_epoch": "1441238400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770249600000",
    "number": "1588032866",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "28 CRESCENT ST",
            "city": "MIDDLETOWN",
            "state": "CT",
            "postal_code": "064573654",
            "telephone_number": "860-358-4870",
            "fax_number": "860-358-8661"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "147 WESTBROOK RD",
            "city": "ESSEX",
            "state": "CT",
            "postal_code": "064261512",
            "telephone_number": "860-358-5065",
            "fax_number": "860-358-8653"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HARDER",
        "first_name": "SIOBHAN",
        "credential": "APRN",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-09-03",
        "last_updated": "2026-02-05",
        "certification_date": "2026-02-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "CT",
            "license": "6307",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth Hale, LCSW
• Lindsay Hale, BA
• Mariah Hanania
• Caitlin Hanrahan, OTR/L
• Jessica K Hansen, PA
• Brittany Hargis
• Taylor C Hartman
• Earl Rodney Hornbake III, MD
• Joan Marie Horwat, LCSW
• Dianne Hunt-Mason, A.P.R.N.C.S, M.ED

• Family Nurse Practitioner in Essex, CT
• Providers in Essex, CT by specialty
• Family Nurse Practitioner in Connecticut

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