Golden State Dermatology Associates, Inc.

Primary specialty

Dermatology PhysicianTaxonomy code 207N00000X

Legal business name

GOLDEN STATE DERMATOLOGY ASSOCIATES, INC.

Practice address

355 Lennon LN Ste 255
Walnut Creek, CA 94598-2496

Phone

(925) 932-7704

Fax

(925) 932-7752

NPI assigned

Dec 2, 2005

Organization subpart

No

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

Authorized official

Name

Dr. Jeffrey Thomas Bortz, M.D.NPI 1710191382

Title

Owner/Medical Director

Phone

(925) 932-7704

Specialties & licenses 4

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Other NPIs with the same Medicare PAC ID 1

NPIs whose Medicare enrollments share a PECOS associate control ID (the same enrolled entity).

• Golden State Dermatology Associates, Inc.

  • Ambulatory Surgical Clinic/Center
  • Fresno, CA
  • NPI 1235738576

  1052418175

  Same PAC ID

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

CLIA laboratory certificates

Locations

Practitioners 153

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

• Jeffrey Thomas Bortz, M.D.

  • MOHS-Micrographic Surgery Physician
  • Walnut Creek, CA
  • NPI 1710191382

  CA, Dermatology

  Medicare reassignment Care Compare group NPD Authorized official
• Lisa Aldrich, APRN

  • Nurse Practitioner
  • Saint Helena, CA
  • NPI 1477631778

  CA

  Medicare reassignment Care Compare group NPD
• Hovik Ashchyan, MD

  • Dermatology Physician
  • Walnut Creek, CA
  • NPI 1710477088

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Alison Ann Boudreaux, M.D.

  • Dermatology Physician
  • Sacramento, CA
  • NPI 1093782120

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Gregory Michael Bricca, MD

  • MOHS-Micrographic Surgery Physician
  • Roseville, CA
  • NPI 1184628000

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Merrick Adam Brodsky, MD

  • MOHS-Micrographic Surgery Physician
  • Long Beach, CA
  • NPI 1609300649

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Jacqueline Marie Calkin, M.D.

  • Dermatology Physician
  • Sacramento, CA
  • NPI 1871561589

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• John E Call, MD

  • Dermatology Physician
  • San Ramon, CA
  • NPI 1376997767

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Caroline Roberta Campbell, MD

  • Dermatology Physician
  • Napa, CA
  • NPI 1538651385

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Kevin Young Chao, MD

  • MOHS-Micrographic Surgery Physician
  • Roseville, CA
  • NPI 1780187500

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Michelle Weiyee Cheng

  • Dermatology Physician
  • Los Angeles, CA
  • NPI 1720582059

  CA, Dermatology

  Medicare reassignment Care Compare group NPD
• Lisa Chipps, MD, MS

  • MOHS-Micrographic Surgery Physician
  • Beverly Hills, CA
  • NPI 1689720278

  CA, Dermatology

  Medicare reassignment Care Compare group NPD

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

{
    "created_epoch": "1133481600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1774569600000",
    "number": "1700860871",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "370 N WIGET LN STE 250",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982488",
            "telephone_number": "925-945-7005",
            "fax_number": "925-954-1822"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "355 LENNON LN STE 255",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945982496",
            "telephone_number": "925-932-7704",
            "fax_number": "925-932-7752"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1058 Murrieta Blvd",
            "address_purpose": "LOCATION",
            "city": "Livermore",
            "state": "CA",
            "postal_code": "945504111",
            "country_code": "US",
            "telephone_number": "925-277-1300 x92594",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5640 N Fresno St Ste 110",
            "address_purpose": "LOCATION",
            "city": "Fresno",
            "state": "CA",
            "postal_code": "937106098",
            "country_code": "US",
            "telephone_number": "559-266-9906",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1200 Central Blvd Ste D",
            "address_purpose": "LOCATION",
            "city": "Brentwood",
            "state": "CA",
            "postal_code": "945132227",
            "country_code": "US",
            "telephone_number": "925-308-9510",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "410 E Yosemite Ave Ste C",
            "address_purpose": "LOCATION",
            "city": "Merced",
            "state": "CA",
            "postal_code": "953408220",
            "country_code": "US",
            "telephone_number": "209-722-7801",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "355 Lennon Ln Ste 235",
            "address_purpose": "LOCATION",
            "city": "Walnut Creek",
            "state": "CA",
            "postal_code": "945982544",
            "country_code": "US",
            "telephone_number": "925-357-9050",
            "fax_number": "925-357-9040",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2255 Ygnacio Valley Rd Ste B1",
            "address_purpose": "LOCATION",
            "city": "Walnut Creek",
            "state": "CA",
            "postal_code": "945983335",
            "country_code": "US",
            "telephone_number": "925-945-7005 x92594",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1000 Delbon Ave Ste 8",
            "address_purpose": "LOCATION",
            "city": "Turlock",
            "state": "CA",
            "postal_code": "953822008",
            "country_code": "US",
            "telephone_number": "209-722-7801",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1542 N Tracy Blvd # A",
            "address_purpose": "LOCATION",
            "city": "Tracy",
            "state": "CA",
            "postal_code": "953762903",
            "country_code": "US",
            "telephone_number": "209-836-2220",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5201 Norris Canyon Rd",
            "address_purpose": "LOCATION",
            "city": "San Ramon",
            "state": "CA",
            "postal_code": "945835411",
            "country_code": "US",
            "telephone_number": "925-277-1300",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "280 Baldwin Ave",
            "address_purpose": "LOCATION",
            "city": "San Mateo",
            "state": "CA",
            "postal_code": "944013915",
            "country_code": "US",
            "telephone_number": "650-727-6008",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5575 W Las Positas Blvd Ste 260",
            "address_purpose": "LOCATION",
            "city": "Pleasanton",
            "state": "CA",
            "postal_code": "945885803",
            "country_code": "US",
            "telephone_number": "925-847-3020",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "400 Taylor Blvd Ste 301",
            "address_purpose": "LOCATION",
            "city": "Pleasant Hill",
            "state": "CA",
            "postal_code": "945232160",
            "country_code": "US",
            "telephone_number": "925-687-8882",
            "fax_number": "925-318-9657",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1324 Nelson Ave",
            "address_purpose": "LOCATION",
            "city": "Modesto",
            "state": "CA",
            "postal_code": "953505374",
            "country_code": "US",
            "telephone_number": "209-524-9481",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "GOLDEN STATE DERMATOLOGY ASSOCIATES, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2005-12-02",
        "last_updated": "2026-03-27",
        "certification_date": "2026-03-27",
        "status": "A",
        "authorized_official_last_name": "BORTZ",
        "authorized_official_first_name": "JEFFREY",
        "authorized_official_middle_name": "THOMAS",
        "authorized_official_title_or_position": "OWNER/MEDICAL DIRECTOR",
        "authorized_official_telephone_number": "925-932-7704",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207N00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Dermatology",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207ND0101X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Dermatology, MOHS-Micrographic Surgery",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207ND0900X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Dermatology, Dermatopathology",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207NS0135X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Dermatology, Procedural Dermatology",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LICENSE",
            "identifier": "A487440",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CLIA NUMBER",
            "identifier": "05D096539",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Alex Goldberg, LAC
• David Goldberg, M.D.
• Roger A Goldberg, MD
• Golden Heart Counseling
• Golden Hills Plastic Surgery Inc.
• Golden State Dermatology, Inc.
• Golden State Orthopedics & Spine
• Golden State Orthopedics & Spine
• Tayla Golden
• Steven M Goldman, DDS

• All providers in Walnut Creek, CA
• Dermatology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 27, 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.