Gregory Alan Wolff, MD

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

57318-20 Issued in WI

Practice address

725 American Ave
Waukesha, WI 53188-5031

Phone

(262) 928-1000

NPI assigned

Apr 1, 2008

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 3

Addresses

Other identifiers 2

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in WI

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Anesthesiology

Education

University of Rochester School of Medicine and Dentistry, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Anex, S.C.Group PAC ID 4486540556, 38 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Waukesha Memorial Hospital Hospital, Waukesha, WI, CCN 520008
• Oconomowoc Memorial Hospital Hospital, Oconomowoc, WI, CCN 520062

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: gregory.wolff@marshfieldclinichealthsystem.cernerdirect.com

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.

• Anex, S.C.

  • Anesthesiology Physician
  • Waukesha, WI
  • NPI 1578510632
  Medicare reassignment Care Compare group NPD
• MCHS Hospitals Inc

  • Clinic/Center
  • Marshfield, WI
  • NPI 1093221434

  Anesthesiology

  NPD
• Chad Novasic PT LTD

  • Physical Therapist
  • Racine, WI
  • NPI 1578679890
  NPD (past)

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

• Prohealth Oconomowoc Memorial Hospital, Inc.

  • General Acute Care Hospital
  • Oconomowoc, WI
  • NPI 1366420531
  Care Compare affiliation
• Prohealth Oconomowoc Memorial Hospital, Inc.

  • Community/Retail Pharmacy
  • Oconomowoc, WI
  • NPI 1497942205

  Hospital

  Care Compare affiliation
• Prohealth Waukesha Memorial Hospital, Inc.

  • General Acute Care Hospital
  • Waukesha, WI
  • NPI 1629056890
  Care Compare affiliation

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

{
    "created_epoch": "1207008000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749686400000",
    "number": "1356513006",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "14550 RIDGEMOOR DR",
            "city": "ELM GROVE",
            "state": "WI",
            "postal_code": "531221130"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "725 AMERICAN AVE",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531885031",
            "telephone_number": "262-928-1000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WOLFF",
        "first_name": "GREGORY",
        "middle_name": "ALAN",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2008-04-01",
        "last_updated": "2025-06-12",
        "certification_date": "2025-06-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CO",
            "license": "49740",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "CO",
            "license": "2549",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "WI",
            "license": "57318-20",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "28203330",
            "state": "CO"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "KAISER COMMERCIAL NUMBER",
            "identifier": "022266",
            "state": "CO"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "gwolff46311@direct.ascension.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "CDA/CCD/TXT",
            "address_1": "19333 W North Ave",
            "city": "Brookfield",
            "state": "WI",
            "country_code": "US",
            "postal_code": "530454132",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Debra K Wolf, SW
• Jamie J Wolf, APNP
• Kathleen Wolf, O.T.
• Polly Wolf, BS
• Jordan Wolfe
• Alicia M. Wolfs, P.T.
• Elizabeth Cortney Wollert, BA
• Marta Wolter
• Greg N Womack, MD
• Women & Families' Psychotherapy Resources, Inc

• Anesthesiology Physician in Waukesha, WI
• Providers in Waukesha, WI by specialty
• Anesthesiology Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 12, 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.
• 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.