NPIMap

Individual provider Active NPI

Martin Simon Gross, MD

  • Urology Physician
  • New Haven, CT
National Provider Identifier
1881915833
Registry record updated Aug 6, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Urology PhysicianTaxonomy code 208800000X
License
86191 Issued in CT
Practice address
789 Howard Ave
New Haven, CT 06519-1304
Phone
(203) 785-2815
NPI assigned
Jun 14, 2010
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 6, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Urology Physician 208800000X 17624 NH
Urology Physician 208800000X 86191 CT Primary

Addresses

Primary practice location

789 Howard Ave
New Haven, CT 06519-1304

Mailing address

789 Howard Ave
New Haven, CT 06519-1304
Phone (203) 785-2815

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20160902001795 NH Practitioner - Urology 8729210646 Reassigns benefits to 5 organizations

Care Compare profile

Medicare Care Compare
Specialty
Urology
Education
Other, 2010
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Mary Hitchcock Memorial HospitalGroup PAC ID 4486561164, 1,269 clinicians
The New London Hospital Association IncGroup PAC ID 5294643623, 66 clinicians
Cheshire Medical CenterGroup PAC ID 1456260165, 165 clinicians
Dartmouth-Hitchcock ClinicGroup PAC ID 4183537509, 1,445 clinicians

Practice addresses (Care Compare)

1 Medical Ctr Dr
Lebanon, NH 03756-1000
Phone (603) 650-5000

273 Country Rd
New London, NH 03257-5736
Phone (603) 526-5215

580 Court St
Keene, NH 03431-1718
Phone (603) 354-5454

590 Court St
Keene, NH 03431-1719
Phone (603) 354-5400

Hospital & facility affiliations

  • Mary Hitchcock Memorial Hospital Hospital, Lebanon, NH, CCN 300003
  • Cheshire Medical Center Hospital, Keene, NH, CCN 300019
  • New London Hospital Hospital, New London, NH, CCN 301304
  • Alice Peck Day Memorial Hospital Hospital, Lebanon, NH, CCN 301305

Merit-based Incentive Payment System (MIPS)

Final score
84.26 of 100Reported as group
Quality
75.44
Promoting interoperability
100
Improvement activities
40
Cost
72.09

Merit-based Incentive Payment System (MIPS)

Final score
79.66 of 100Reported as apm
Quality
53.51
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
79.66 of 100Reported as apm
Quality
53.51
Promoting interoperability
100
Improvement activities
40

Merit-based Incentive Payment System (MIPS)

Final score
79.66 of 100Reported as apm
Quality
53.51
Promoting interoperability
100
Improvement activities
40

Procedures performed for Medicare patients

ProcedureNumber of procedures
Melanoma (skin cancer) excision1-10
Removal of tissue1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
17624NHMDUrology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Cheshire Medical Center CurrentSince Jan 1, 2019 Accepting new patients
The New London Hospital Association, Inc. CurrentSince Feb 12, 2020 Accepting new patients
Mary Hitchcock Memorial Hospital CurrentSince Aug 1, 2016 Accepting new patients
The New London Hospital Association, Inc. CurrentSince Feb 12, 2020 Accepting new patients
Mary Hitchcock Memorial Hospital CurrentSince Aug 1, 2016 Accepting new patients
Mary Hitchcock Memorial Hospital CurrentSince Jan 1, 2019 Accepting new patients
Dartmouth-Hitchcock Clinic CurrentSince Aug 1, 2016 Accepting new patients
The New London Hospital Association, Inc. Past Accepting new patients

Locations

580 Court St
Keene, NH 03431
Phone (603) 354-5454

590 Court St
Keene, NH 03431
Phone (603) 354-5454

1 Medical Dr
Lebanon, NH 03756
Phone (603) 650-5922

273 County Rd
New London, NH 03257
Phone (603) 526-5215

Interoperability endpoints

  • Direct secure messaging: mgross238775@direct.dartmouth-hitchcock.org

Organizations & group practices 8

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.

Hospital & facility affiliations 11

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": "1276473600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785974400000",
    "number": "1881915833",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "789 HOWARD AVE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191304",
            "telephone_number": "203-785-2815"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "789 HOWARD AVE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191304",
            "telephone_number": "203-785-2815"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GROSS",
        "first_name": "MARTIN",
        "middle_name": "SIMON",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-06-14",
        "last_updated": "2026-08-06",
        "certification_date": "2026-08-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "NH",
            "license": "17624",
            "primary": false
        },
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "CT",
            "license": "86191",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New Haven, CT

Sources for this page

Verify at the official NPI Registry.