NPIMap

Individual provider Active NPI

Darren S O'Neill, M.D.

  • Internal Medicine Physician
  • Enfield, CT
National Provider Identifier
1861434607
Registry record updated May 19, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
36429 Issued in CT
Practice address
701 Enfield St
Enfield, CT 06082-2961
Phone
(860) 741-6058
Fax
(413) 733-5860
NPI assigned
Jun 12, 2006
Last updated
May 19, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on May 19, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 36429 CT Primary
Internal Medicine Physician 207R00000X 151285 MA

Addresses

Primary practice location

701 Enfield St
Enfield, CT 06082-2961

Mailing address

280 Chestnut St FL 2
Springfield, MA 01199-1001
Phone (413) 794-3909

Other identifiers 5

IdentifierTypeStateIssuer
151285OtherMATUFTS HEALTH PLAN
010036429CT01OtherCTBLUE CROSS BLUE SHIELD
24085OtherMAHEALTH NEW ENGLAND
3176835MedicaidMA
J18564OtherMABLUE CROSS BLUE SHIELD

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA, CT2 enrollments
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20100715000212 MA Practitioner - Internal Medicine 9739211491
I20100929001009 CT Practitioner - Internal Medicine 9739211491 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Connecticut School of Medicine, 1994
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Baystate Medical Practices IncGroup PAC ID 5991602971, 1,350 clinicians
Springfield Medical Associates, Inc.Group PAC ID 6103725452, 10 clinicians

Practice addresses (Care Compare)

701 Enfield St
Enfield, CT 06082-2961
Phone (860) 741-6058

701 Enfield St
Suite 100
Enfield, CT 06082-2977
Phone (860) 741-6058

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of tissue1-10
Removal of skin lesions1-10

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

Organizations & group practices 2

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.

Hospital & facility affiliations 13

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

View all 13

NPI Registry JSON

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

{
    "created_epoch": "1150070400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779148800000",
    "number": "1861434607",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "280 CHESTNUT ST FL 2",
            "city": "SPRINGFIELD",
            "state": "MA",
            "postal_code": "011991001",
            "telephone_number": "413-794-3909"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "701 ENFIELD ST",
            "city": "ENFIELD",
            "state": "CT",
            "postal_code": "060822961",
            "telephone_number": "860-741-6058",
            "fax_number": "413-733-5860"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'NEILL",
        "first_name": "DARREN",
        "middle_name": "S",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-12",
        "last_updated": "2026-05-19",
        "certification_date": "2026-05-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "36429",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "151285",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS HEALTH PLAN",
            "identifier": "151285",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "010036429CT01",
            "state": "CT"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HEALTH NEW ENGLAND",
            "identifier": "24085",
            "state": "MA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3176835",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "J18564",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Enfield, CT

Sources for this page

Verify at the official NPI Registry.