Russell P Mackay

Primary specialty

Mental Health CounselorTaxonomy code 101YM0800X

License

LMHC10002806 Issued in MA

Practice address

434 Massachusetts Ave Ste 501
Boston, MA 02118-3522

Phone

(339) 666-8516

Fax

(617) 807-0958

NPI assigned

Sep 28, 2006

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 MA

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

Mental Health Counselor

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Thrive Counseling LLCGroup PAC ID 0749458420, 1,187 clinicians

Practice addresses (Care Compare)

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.

• Thrive Counseling LLC

  • Mental Health Counselor
  • Lynchburg, VA
  • NPI 1215181300

  MA

  Medicare reassignment Care Compare group NPD
• Utah Center for Psychological Services

  • Clinical Psychologist
  • West Jordan, UT
  • NPI 1417659186
  NPD (past)

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

{
    "created_epoch": "1159401600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748822400000",
    "number": "1790877090",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1003 EASTGATE DR",
            "city": "PROVO",
            "state": "UT",
            "postal_code": "846065601",
            "telephone_number": "801-380-3914"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "434 MASSACHUSETTS AVE STE 501",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021183522",
            "telephone_number": "339-666-8516",
            "fax_number": "617-807-0958"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1003 Eastgate Dr",
            "address_purpose": "LOCATION",
            "city": "Provo",
            "state": "UT",
            "postal_code": "846065601",
            "country_code": "US",
            "telephone_number": "801-380-3914",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MACKAY",
        "first_name": "RUSSELL",
        "middle_name": "P",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-09-28",
        "last_updated": "2025-06-02",
        "certification_date": "2025-06-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "MA",
            "license": "LMHC10002806",
            "primary": true
        },
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "UT",
            "license": "5935490-6009",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Darby Mack
• Jennifer Williams Mack, MD MPH
• Johnathan Mack, M.D.
• Molly Mack, ACNPC-AG
• Christopher R Mackay
• Fiona Mackenzie, RN
• Jeremy Mackenzie
• Kimberly Anne Mackenzie, PA-C
• Lindsey Mackenzie
• Sarah Mackenzie, MS, CCC-SLP

• Mental Health Counselor in Boston, MA
• Providers in Boston, MA by specialty
• Mental Health Counselor in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 2, 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.