William P Mustas, P.A.

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

1307 Issued in WI

Practice address

1111 Delafield St Ste 215
Waukesha, WI 53188-3403

Phone

(262) 542-0074

Fax

(262) 542-2803

NPI assigned

Aug 13, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in WI, NM2 enrollments

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 2

Specialty

Physician Assistant

Education

Other, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Los Alamos Physician Practices LLCGroup PAC ID 4587661541, 19 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Los Alamos Medical Center Hospital, Los Alamos, NM, CCN 320033

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: william.mustas.1@19849.direct.athenahealth.com
• Direct secure messaging: williammustas@metro.medalliesdirect.net

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.

• Los Alamos Physician Practices LLC

  • Family Medicine Physician
  • Los Alamos, NM
  • NPI 1750330510
  Medicare reassignment Care Compare group
• Ascension Medical Group-Southeast Wisconsin Inc

  • Internal Medicine Physician
  • Glendale, WI
  • NPI 1609881077

  Physician Assistant

  Medicare reassignment NPD
• Metropolitan Urology Group, SC

  • Urology Physician
  • Milwaukee, WI
  • NPI 1336201110
  Medicare reassignment
• Signify Health Medical Associates, PLLC

  • General Practice Physician
  • Dallas, TX
  • NPI 1750845863

  WI

  Medicare reassignment
• Los Alamos Physician Practices, LLC

  • Surgery Physician
  • Los Alamos, NM
  • NPI 1801075783
  NPD
• Prohealth Medical Group Inc

  • Family Medicine Physician
  • Waukesha, WI
  • NPI 1790720613
  NPD (past)

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

• PHC-Los Alamos Inc

  • Rural Acute Care Hospital
  • Los Alamos, NM
  • NPI 1285701623
  Care Compare affiliation

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

{
    "created_epoch": "1155427200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1726617600000",
    "number": "1629080932",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1111 DELAFIELD ST STE 215",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531883403",
            "telephone_number": "262-542-0074",
            "fax_number": "262-542-2803"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1111 DELAFIELD ST STE 215",
            "city": "WAUKESHA",
            "state": "WI",
            "postal_code": "531883403",
            "telephone_number": "262-542-0074",
            "fax_number": "262-542-2803"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MUSTAS",
        "first_name": "WILLIAM",
        "middle_name": "P",
        "credential": "P.A.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-08-13",
        "last_updated": "2024-09-18",
        "certification_date": "2024-09-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "WI",
            "license": "1307",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LICENSE",
            "identifier": "1703",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Glen-James Murphy, D.C.
• James Francis Murphy Sr., D.D.S.
• Barbara J Murray, MS, LPC
• Michael D Murrell
• Gina Ann Musa
• Debra A Muth, NP
• Myeyedr Optometry of Wisconsin, LLC
• Donald J Nadar, MD
• Amin Namazi, APNP
• Melissa Napiorkowski, CSW, CADC-D

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 18, 2024; 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.