William Porcaro, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

220425 Issued in MA

Practice address

41 Mall Rd
Burlington, MA 01805-0001

Phone

(781) 744-8000

NPI assigned

Nov 23, 2005

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

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in MA

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

Emergency Medicine

Education

University of Massachusetts Medical School, 2002

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Associated Physicians of Harvard Medical Faculty Physicians at Beth IsGroup PAC ID 6305749987, 566 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Mount Auburn Hospital Hospital, Cambridge, MA, CCN 220002

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/86/brand/1/csg/1/fhir/r4

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.

• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

  • Emergency Medical Services (Emergency Medicine) Physician
  • Boston, MA
  • NPI 1952358533
  Medicare reassignment Care Compare group NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1194765438
  Medicare reassignment NPD
• Mount Auburn Professional Services Inc

  • Internal Medicine Physician
  • Cambridge, MA
  • NPI 1992750996

  Emergency Medicine

  Medicare reassignment NPD
• Lahey Clinic, Inc

  • Internal Medicine Physician
  • Peabody, MA
  • NPI 1063447316
  Medicare reassignment
• Lahey Clinic, Inc.

  • Internal Medicine Physician
  • Burlington, MA
  • NPI 1538194980
  Medicare reassignment
• Associated Physicians of Harvard Medical Faculty Physicians at Beth Is

  • Multi-Specialty Clinic/Center
  • Boston, MA
  • NPI 1861216038
  NPD
• Harvard Medical Faculty Phys at Beth Israel Deaconess Med Ctr Inc

  • Emergency Medicine Physician
  • Boston, MA
  • NPI 1316987993
  NPD
• Mt Auburn Professional Services

  • Internal Medicine Physician
  • Cambridge, MA
  • NPI 1013375203
  NPD
• Umass Memorial Medical Group Inc

  • Internal Medicine Physician
  • Worcester, MA
  • NPI 1760445373

  Emergency Medicine

  NPD (past)

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

• Mount Auburn Hospital

  • General Acute Care Hospital
  • Cambridge, MA
  • NPI 1689670259
  Care Compare affiliation

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

{
    "created_epoch": "1132704000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785456000000",
    "number": "1952384976",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "41 MALL RD",
            "city": "BURLINGTON",
            "state": "MA",
            "postal_code": "018050001",
            "telephone_number": "781-744-8000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "41 MALL RD",
            "city": "BURLINGTON",
            "state": "MA",
            "postal_code": "018050001",
            "telephone_number": "781-744-8000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "55 Lake Ave N",
            "address_2": "Department of Emergency Medicine",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016550002",
            "country_code": "US",
            "telephone_number": "508-856-4101",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "PORCARO",
        "first_name": "WILLIAM",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-23",
        "last_updated": "2026-07-31",
        "certification_date": "2026-07-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MA",
            "license": "220425",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "2103435",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Michael Plourde, PA-C
• Daniel Pohl, MD
• Craig Philip Polizzi, PHD
• Grazyna Pomorska, MD
• Andrew Popelka Jr., M.D.
• Nancy Porter, LICSW
• Ashley Portorreal
• Amanda G Powell, MD
• Katherine Ann Powers
• Sathyavani M Prabhakar, MD

• Emergency Medicine Physician in Burlington, MA
• Providers in Burlington, MA by specialty
• Emergency Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 31, 2026; 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.