William Carl Mackenzie, PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

9112545 Issued in FL

Practice address

2200 Fowler Grove Blvd Ste 360
Winter Garden, FL 34787-5597

Phone

(844) 407-4070

NPI assigned

Jun 24, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in FL

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 1

Specialty

Physician Assistant

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Ability Health Services, IncGroup PAC ID 4082523329, 1,249 clinicians

Ability Health Services and Rehabilitation LPGroup PAC ID 4981986288, shared by 2 NPIs, 1,260 clinicians

Florida Hospital Medical Group IncGroup PAC ID 0749186153, 1,735 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Adventhealth Orlando Hospital, Orlando, FL, CCN 100007

Merit-based Incentive Payment System (MIPS)

Final score

79.91 of 100Reported as group

Quality

61.18

Promoting interoperability

100

Improvement activities

40

Cost

71.86

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Locations

Networks

• Optimum HealthCare HMO Network
• Freedom Health HMO Network

Interoperability endpoints

• Direct secure messaging: wmackenzie101814@orlandohealth.medalliesdirect.net
• Direct secure messaging: william.mackenzie.1@26755.direct.athenahealth.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.

• Florida Hospital Medical Group Inc

  • Family Medicine Physician
  • Orlando, FL
  • NPI 1225034234

  Physician Assistant

  Medicare reassignment Care Compare group NPD
• Orlando Health Medical Group Inc

  • Internal Medicine Physician
  • Orlando, FL
  • NPI 1669429577
  Medicare reassignment NPD
• Florida Emergency Physicians Kang and Associates MD LLC

  • Emergency Medical Services (Emergency Medicine) Physician
  • Orlando, FL
  • NPI 1811983752
  Medicare reassignment
• Florida Hospital Medical Group Inc

  • Prosthetic/Orthotic Supplier
  • Minneola, FL
  • NPI 1285591545
  NPD
• Orlando Health, Inc.

  • General Acute Care Hospital
  • Orlando, FL
  • NPI 1184709057
  NPD

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

• Adventist Health System-Sunbelt, Inc

  • General Acute Care Hospital
  • Orlando, FL
  • NPI 1306938071
  Care Compare affiliation
• Adventist Health System-Sunbelt, Inc

  • Clinical Medical Laboratory
  • Orlando, FL
  • NPI 1801569728

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1561334400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781740800000",
    "number": "1508427337",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2200 FOWLER GROVE BLVD STE 360",
            "city": "WINTER GARDEN",
            "state": "FL",
            "postal_code": "347875597",
            "telephone_number": "844-407-4070"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2200 FOWLER GROVE BLVD STE 360",
            "city": "WINTER GARDEN",
            "state": "FL",
            "postal_code": "347875597",
            "telephone_number": "844-407-4070"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1141 Patterson Ter",
            "address_purpose": "LOCATION",
            "city": "Lake Mary",
            "state": "FL",
            "postal_code": "327462203",
            "country_code": "US",
            "telephone_number": "844-407-4070",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "25 S Terry Ave",
            "address_purpose": "LOCATION",
            "city": "Orlando",
            "state": "FL",
            "postal_code": "328051843",
            "country_code": "US",
            "telephone_number": "844-407-4070",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "265 E Rollins St Ste 111000",
            "address_purpose": "LOCATION",
            "city": "Orlando",
            "state": "FL",
            "postal_code": "328045502",
            "country_code": "US",
            "telephone_number": "844-407-4070",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1919 E Highway 50",
            "address_purpose": "LOCATION",
            "city": "Clermont",
            "state": "FL",
            "postal_code": "347111975",
            "country_code": "US",
            "telephone_number": "844-407-4070",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "410 Lionel Way Ste 201",
            "address_purpose": "LOCATION",
            "city": "Davenport",
            "state": "FL",
            "postal_code": "338377809",
            "country_code": "US",
            "telephone_number": "844-407-4070",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MACKENZIE",
        "first_name": "WILLIAM",
        "middle_name": "CARL",
        "name_prefix": "Mr.",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-06-24",
        "last_updated": "2026-06-18",
        "certification_date": "2026-06-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "FL",
            "license": null,
            "primary": false
        },
        {
            "code": "363AS0400X",
            "taxonomy_group": "",
            "desc": "Physician Assistant, Surgical",
            "state": "FL",
            "license": "PA9112545",
            "primary": false
        },
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "FL",
            "license": "9112545",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "104444700",
            "state": "FL"
        }
    ],
    "endpoints": [],
    "other_names": []
}

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• Physician Assistant in Winter Garden, FL
• Providers in Winter Garden, FL by specialty
• Physician Assistant in Florida

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