Peter Charles Williams, PH.D.

Primary specialty

Clinical PsychologistTaxonomy code 103TC0700X

License

3525 Issued in MA

Practice address

5 67TH St
Newburyport, MA 01950-4444

Phone

(978) 465-3366

Fax

(978) 499-9922

NPI assigned

Jan 11, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 4

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Eligible to order & refer

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

Green means eligible to order or refer.

Opted out of Medicare

Yes, effective Jul 31, 2017 through Jul 31, 2027

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Philosophy

Practice roles

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.

• Peter Williams, PHD

  • Clinical Psychologist
  • Newburyport, MA
  • NPI 1902253693
  NPD (past) Authorized official

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

{
    "created_epoch": "1168473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1609926609",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 1197",
            "city": "NEWBURYPORT",
            "state": "MA",
            "postal_code": "019506197",
            "telephone_number": "978-465-3366",
            "fax_number": "978-499-9922"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5 67TH ST",
            "city": "NEWBURYPORT",
            "state": "MA",
            "postal_code": "019504444",
            "telephone_number": "978-465-3366",
            "fax_number": "978-499-9922"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "PETER",
        "middle_name": "CHARLES",
        "name_prefix": "Dr.",
        "credential": "PH.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-01-11",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "MA",
            "license": "3525",
            "primary": false
        },
        {
            "code": "103G00000X",
            "taxonomy_group": "",
            "desc": "Clinical Neuropsychologist",
            "state": "MA",
            "license": "3525",
            "primary": false
        },
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "MA",
            "license": "3525",
            "primary": false
        },
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "MA",
            "license": "3525",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Elizabeth Coppola Wikman, O.D.
• Tracy J Wilbraham, NP
• William T Benson DMD PC
• Marci Ann Williams, OTC
• Michael Williams, REV
• Eric M Wilner, M.D.
• Jenna Wilson, PA-C
• Peter John Wilson, DMD
• Alison B Winters, L.AC.
• Cate Wolff, M.ED

• Clinical Psychologist in Newburyport, MA
• Providers in Newburyport, MA by specialty
• Clinical Psychologist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 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; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.