William Leach, MD

Primary specialty

Infectious Disease PhysicianTaxonomy code 207RI0200X

License

82262 Issued in CT

Practice address

18 Haynes St FL 2
Manchester, CT 06040-4111

Phone

(860) 874-9372

NPI assigned

Apr 13, 2020

Last updated

Jun 27, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

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 CT

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

Infectious Disease

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hartford Healthcare Medical Group Specialists PLLCGroup PAC ID 3173866241, 1,555 clinicians

Prospect CT Medical Foundation IncGroup PAC ID 7416244496, 287 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Manchester Memorial Hospital Hospital, Manchester, CT, CCN 070027
• Hartford Hospital Hospital, Hartford, CT, CCN 070025

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: williamleach@mpp.allscriptsdirect.net

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Prospect CT Medical Foundation, Inc.

  • Family Medicine Physician
  • Manchester, CT
  • NPI 1144677568
  Medicare reassignment Care Compare group NPD
• Hartford Healthcare Medical Group Specialists, PLLC

  • Surgery Physician
  • Hartford, CT
  • NPI 1023584216
  Medicare reassignment Care Compare group
• Medical Access P.C.

  dba Tru Urgent Care DMV

  • Urgent Care Clinic/Center
  • Germantown, MD
  • NPI 1144291204
  NPD
• Eastern Connecticut Medical Professionals Foundation, Inc

  dba Eastern Orthopeadics and Sports Medicine, PC

  • Specialist
  • South Windsor, CT
  • NPI 1497864516
  NPD (past)

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

• Hartford Hospital

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1770696643
  Care Compare affiliation
• Hartford Hospital

  • General Acute Care Hospital
  • Hartford, CT
  • NPI 1902834880
  Care Compare affiliation
• Manchester Memorial Hospital, Inc.

  • General Acute Care Hospital
  • Manchester, CT
  • NPI 1881564664
  Care Compare affiliation

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

{
    "created_epoch": "1586736000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1750982400000",
    "number": "1114546785",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18 HAYNES ST FL 2",
            "city": "MANCHESTER",
            "state": "CT",
            "postal_code": "060404111",
            "telephone_number": "860-874-9372",
            "fax_number": "860-812-1860"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18 HAYNES ST FL 2",
            "city": "MANCHESTER",
            "state": "CT",
            "postal_code": "060404111",
            "telephone_number": "860-874-9372"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LEACH",
        "first_name": "WILLIAM",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-13",
        "last_updated": "2025-06-27",
        "certification_date": "2025-06-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": false
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "CT",
            "license": "82262",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Grace C Lavallee
• Amanda Lavigne
• Bridget Mary Lavoie
• Messan Lawson, APRN
• Angela Lea, LCSW
• Chastity Leak
• Alicia Renai Lee
• Allana R Lee, D.O.
• Brandon J Lee
• Joohan Lee, DDS

• Infectious Disease Physician in Manchester, CT
• Providers in Manchester, CT by specialty
• Infectious Disease Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 27, 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.