William Young Guo, MD

Primary specialty

MOHS-Micrographic Surgery PhysicianTaxonomy code 207ND0101X

License

343125 Issued in NY

Practice address

1320 Stony Brook Rd BLDG F
Stony Brook, NY 11790-2206

Phone

(631) 444-4200

NPI assigned

Mar 29, 2021

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

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.

• Stony Brook Dermatology Associates, University Faculty Practice Corpor

  • Dermatology Physician
  • Stony Brook, NY
  • NPI 1497700819
  NPD (past)
• Stony Brook Pathologists, University Faculty Practice Corporation

  • Anatomic Pathology & Clinical Pathology Physician
  • Stony Brook, NY
  • NPI 1912944794
  NPD (past)

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

{
    "created_epoch": "1616976000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785715200000",
    "number": "1942888482",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1320 STONY BROOK RD BLDG F",
            "city": "STONY BROOK",
            "state": "NY",
            "postal_code": "117902206",
            "telephone_number": "631-444-4200"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1320 STONY BROOK RD BLDG F",
            "city": "STONY BROOK",
            "state": "NY",
            "postal_code": "117902206",
            "telephone_number": "631-444-4200"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUO",
        "first_name": "WILLIAM",
        "middle_name": "YOUNG",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-03-29",
        "last_updated": "2026-08-03",
        "certification_date": "2026-08-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "NY",
            "license": "343125",
            "primary": false
        },
        {
            "code": "207ND0101X",
            "taxonomy_group": "",
            "desc": "Dermatology, MOHS-Micrographic Surgery",
            "state": "NY",
            "license": "343125",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Achuta Kumar Guddati, MD
• Annette Guerrero, DNP, FNP-BC
• Anthony Guiffre-Oliva
• Michael Z Guo, M.D.
• Rubin Guo, NP
• Xiaojun Guo, M.D.
• Abhishek Kumar Gupta, DO
• Ashwini Gupta, MBBS
• Nidhi Gupta, M.D
• Rajarsi Gupta, MD, PHD

• MOHS-Micrographic Surgery Physician in Stony Brook, NY
• Providers in Stony Brook, NY by specialty
• MOHS-Micrographic Surgery Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 3, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.