Individual provider Active NPI

David Lawrence Maslak, MD

  • Internal Medicine Physician
  • Derby, CT
National Provider Identifier
1477916179
Registry record updated Nov 27, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
62720 Issued in CT
Practice address
130 Division St
Derby, CT 06418-1326
Phone
(203) 732-1330
Fax
(203) 732-1332
NPI assigned
Mar 30, 2016
Last updated
Nov 27, 2024By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Nov 27, 2024

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X 62720 CT Primary
Hospitalist Physician 208M00000X 323344 NY
Hospitalist Physician 208M00000X 62720 CT

Addresses

Primary practice location

130 Division St
Derby, CT 06418-1326

Mailing address

67 Maple Ave
Derby, CT 06418-1328

Other practice location 1

24 Hospital Ave
Danbury, CT 06810-6099
Phone (203) 739-8105

Other practice location 2

670 Stoneleigh Ave
Carmel, NY 10512-3997
Phone (845) 279-5711

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CT, NY2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20190723002797 CT Practitioner - Internal Medicine 2163701293 Reassigns benefits to 10 organizations
I20241219001037 NY Practitioner - Internal MedicinePractitioner - Hospitalist 2163701293 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Other, 2016
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Griffin Faculty Physicians IncGroup PAC ID 7618871997, 125 clinicians
Nuvance Health Medical Practice CT IncGroup PAC ID 4789597691, 742 clinicians
Middlesex HospitalGroup PAC ID 5092611731, 231 clinicians
Day Kimball Medical Group IncGroup PAC ID 1557514411, 91 clinicians
The Charlotte Hungerford HospitalGroup PAC ID 4486557501, 206 clinicians

Practice addresses (Care Compare)

130 Division St
Derby, CT 06418-1326
Phone (203) 732-1352

24 Hospital Ave
Danbury, CT 06810-6099
Phone (203) 739-7118

241 N Rd
Poughkeepsie, NY 12601-1154
Phone (845) 483-5000

28 Crescent St
Middletown, CT 06457-3654
Phone (860) 358-5322

320 Pomfret St
Putnam, CT 06260-1836
Phone (860) 928-6541

540 Litchfield St
Torrington, CT 06790-6679
Phone (860) 496-6666

670 Stoneleigh Ave
Carmel, NY 10512-3997
Phone (845) 278-5683

Hospital & facility affiliations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
62720CTMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Middlesex Hospital CurrentSince Dec 1, 2024 Accepting new patients
Hartford Healthcare Medical Group Specialists, PLLC CurrentSince Dec 20, 2021 Accepting new patients
The Hospital of Central Connecticut at New Britain General and Bradley Internal Medicine CurrentSince May 1, 2023 Accepting new patients
Hospital Medicine Associates LLC Internal Medicine CurrentSince Jul 4, 2025 Accepting new patients
Midstate Medical Center Current Accepting new patients
Hartford Healthcare Medical Group Specialists LLC CurrentSince Dec 20, 2021 Accepting new patients
Midstate Medical Center CurrentSince Jun 5, 2023 Accepting new patients
Upstate Ny Doctor of Medicine PLLC Hospitalist CurrentSince Oct 1, 2025 Accepting new patients
Day Kimball Medical Group Inc Internal Medicine CurrentSince Sep 1, 2025 Accepting new patients
Nuvance Health Medical Practice CT, Inc. Internal Medicine CurrentSince Jul 1, 2019 Accepting new patients
Midstate Medical Center CurrentSince Jun 5, 2023 Accepting new patients
Nuvance Health Medical Practice PC Internal Medicine CurrentSince Feb 9, 2025 Accepting new patients
New York Medical Physician Associates PC Hospitalist CurrentSince Jan 1, 2025 Accepting new patients
Health Quest Medical Practice, PC CurrentSince Feb 9, 2025 Accepting new patients
New York Medical Physician Associates PC Internal Medicine CurrentSince Jan 1, 2025 Accepting new patients
Griffin Faculty Physicians, Inc. Internal Medicine CurrentSince Nov 13, 2024 Accepting new patients
The Charlotte Hungerford Hospital CurrentSince Mar 1, 2021 Accepting new patients
The Charlotte Hungerford Hospital CurrentSince Mar 1, 2021 Accepting new patients
Port Emergency Medical Services, P.C. CurrentSince Feb 15, 2026 Accepting new patients
Middlesex Hospital Internal Medicine CurrentSince Dec 1, 2024 Accepting new patients
The Hospital of Central Connecticut at New Britain General and Bradley CurrentSince May 1, 2023 Accepting new patients
Putnam Hospital Center Past Accepting new patients

Locations

1601 Cummins Dr
Ste D
Modesto, CA 95358
Phone (510) 851-7423

41 Brewster Rd
Bristol, CT 06010
Phone (800) 585-3000

132 Westminster Rd
Canterbury, CT 06331
Phone (860) 546-2225

24 Hospital Ave
Danbury, CT 06810
Phone (203) 739-7118

130 Division St
Derby, CT 06418
Phone (203) 732-1330

67 Maple Ave
Derby, CT 06418
Phone (203) 732-0699

435 Lewis Ave
Meriden, CT 06451
Phone (203) 284-1340

28 Crescent St
Middletown, CT 06457
Phone (860) 358-6000

80 S Main St
Ste 102
Middletown, CT 06457
Phone (860) 358-6878

100 Grand St
New Britain, CT 06052
Phone (860) 224-5011

365 Montauk Ave
New London, CT 06320
Phone (860) 271-4364

21 Elm St
New Milford, CT 06776
Phone (860) 210-5000

320 Pomfret St
Putnam, CT 06260
Phone (860) 963-6331

1244 Storrs Rd
Storrs Mansfield, CT 06268
Phone (860) 724-2579

540 Litchfield St
Torrington, CT 06790
Phone (860) 496-6361

427 Guy Park Ave
Amsterdam, NY 12010
Phone (518) 442-1404

670 Stoneleigh Ave
Carmel, NY 10512
Phone (845) 230-4721

241 North Rd
Poughkeepsie, NY 12601
Phone (845) 431-8889

45 Reade Pl
Fl 2
Poughkeepsie, NY 12601
Phone (845) 483-6001

Interoperability endpoints

  • Direct secure messaging: david.maslak@xdr.hhchealthdirect.org
  • Direct secure messaging: dmaslak95745@middlesexhealthprd.direct-ci.com
  • FHIR API: https://api.platform.athenahealth.com/1694/brand/19/csg/48/fhir/r4

Organizations & group practices 23

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.

View all 23

Hospital & facility affiliations 7

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

NPI Registry JSON

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

{
    "created_epoch": "1459296000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1732665600000",
    "number": "1477916179",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "67 MAPLE AVE",
            "city": "DERBY",
            "state": "CT",
            "postal_code": "064181328"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "130 DIVISION ST",
            "city": "DERBY",
            "state": "CT",
            "postal_code": "064181326",
            "telephone_number": "203-732-1330",
            "fax_number": "203-732-1332"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "24 Hospital Ave",
            "address_purpose": "LOCATION",
            "city": "Danbury",
            "state": "CT",
            "postal_code": "068106099",
            "country_code": "US",
            "telephone_number": "203-739-8105",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "670 Stoneleigh Ave",
            "address_purpose": "LOCATION",
            "city": "Carmel",
            "state": "NY",
            "postal_code": "105123997",
            "country_code": "US",
            "telephone_number": "845-279-5711",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MASLAK",
        "first_name": "DAVID",
        "middle_name": "LAWRENCE",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-03-30",
        "last_updated": "2024-11-27",
        "certification_date": "2024-11-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "62720",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "323344",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CT",
            "license": "62720",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Derby, CT

Sources for this page

Verify at the official NPI Registry.