William A Kosik, P.T.

Primary specialty

Physical TherapistTaxonomy code 225100000X

License

PT 24845 Issued in CA

Practice address

4150 Regents Park Row
#365
La Jolla, CA 92037-9124

Phone

(858) 657-8199

Fax

(858) 657-8170

NPI assigned

May 5, 2006

Sex

Male

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 CA

Enrollment records 1

Specialty

Physical Therapist in Private Practice

Education

University of California, San Francisco School of Medicine, 1999

Medicare assignment

May accept Medicare assignment

Group practices

Proactive Physical Therapy and Sports Medicine IncGroup PAC ID 1557369436, 51 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

54.31 of 100Reported as individual

Quality

28.33

Improvement activities

40

Cost

79.08

Medicare enrollment (NPD)

Enrolled

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.

• Proactive Physical Therapy & Sports Medicine Inc

  • Physical Therapy Clinic/Center
  • Carlsbad, CA
  • NPI 1285729509
  Medicare reassignment Care Compare group
• DPT Holdings PLLC

  • Physical Therapist
  • Plainfield, IL
  • NPI 1689648602

  CA

  Medicare reassignment NPD
• Eggleton & Langton Physical Therapy Management Services

  • Multi-Specialty Clinic/Center
  • Escondido, CA
  • NPI 1972229805

  Physical Therapist

  NPD (past)
• Mesa Physical Therapy

  • Physical Therapist
  • San Diego, CA
  • NPI 1841258126
  NPD (past)

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

{
    "created_epoch": "1146787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1083662456",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "5962 LA PLACE CT",
            "city": "CARLSBAD",
            "state": "CA",
            "postal_code": "920088807",
            "telephone_number": "800-929-4776",
            "fax_number": "760-931-8370"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4150 REGENTS PARK ROW",
            "address_2": "#365",
            "city": "LA JOLLA",
            "state": "CA",
            "postal_code": "920379124",
            "telephone_number": "858-657-8199",
            "fax_number": "858-657-8170"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOSIK",
        "first_name": "WILLIAM",
        "middle_name": "A",
        "credential": "P.T.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-05",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "225100000X",
            "taxonomy_group": "",
            "desc": "Physical Therapist",
            "state": "CA",
            "license": "PT 24845",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jason R. Kornberg, M.D.
• Adva Kornblit, M.D.
• Kara Kornher, PSYD
• Lauren Ann Korty, MS, CGC
• Haig Aram Koshkarian, M.D.
• Adrianna Kosobucki
• Michael P. Kosty, M.D.
• Lily Janet Kotila, M.A., M.A.T.
• Vienna Victoria Kotler, PA
• Jacob Louis Kotlier, MD

• Physical Therapist in La Jolla, CA
• Providers in La Jolla, CA by specialty
• Physical Therapist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.