William Klemczuk Jr., DNP, CRNA

Primary specialty

Certified Registered Nurse AnesthetistTaxonomy code 367500000X

License

RN2306913 Issued in MA

Practice address

81 Highland Ave
Salem, MA 01970-2768

Phone

(978) 741-1200

NPI assigned

Jun 20, 2018

Sex

Male

Sole proprietor

Yes

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

Enrolled in MA

Enrollment records 1

Specialty

Certified Registered Nurse Anesthetist (Crna)

Education

Other, 2025

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Mass General Brigham Medical Group, Inc.Group PAC ID 3971987108, 140 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• North Shore Medical Center - Hospital, Salem, MA, CCN 220035

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

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.

• Mass General Brigham Medical Group, Inc.

  • Internal Medicine Physician
  • Salem, NH
  • NPI 1083360200

  MA

  Medicare reassignment Care Compare group NPD

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

• North Shore Medical Center, Inc.

  • General Acute Care Hospital
  • Salem, MA
  • NPI 1730121633
  Care Compare affiliation

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

{
    "created_epoch": "1529452800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753920000000",
    "number": "1134613359",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "83 LYNN ST",
            "city": "PEABODY",
            "state": "MA",
            "postal_code": "019605735",
            "telephone_number": "857-445-6525"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "81 HIGHLAND AVE",
            "city": "SALEM",
            "state": "MA",
            "postal_code": "019702768",
            "telephone_number": "978-741-1200"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "83 Lynn St",
            "address_purpose": "LOCATION",
            "city": "Peabody",
            "state": "MA",
            "postal_code": "019605735",
            "country_code": "US",
            "telephone_number": "857-445-6525",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KLEMCZUK",
        "first_name": "WILLIAM",
        "name_suffix": "Jr.",
        "credential": "DNP, CRNA",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2018-06-20",
        "last_updated": "2025-07-31",
        "certification_date": "2025-07-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "MA",
            "license": "RN2306913",
            "primary": false
        },
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MA",
            "license": "RN2306913",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Peter A. Kirkpatrick, MD
• Brenda Kissane, LICSW
• Jennifer Marie Kitano, M.S., ATC,OTC,OT-SC
• Erica Lee Klag, RD
• Allyson Tatem Klay, PSYD
• Kim Kline Franklin
• Emily Kline
• Megan Knetemann, MA
• Brianna Knight
• Kelley Knoch-Kabarwal

• Certified Registered Nurse Anesthetist in Salem, MA
• Providers in Salem, MA by specialty
• Certified Registered Nurse Anesthetist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 31, 2025; 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.