Walter E. Martin, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

82557 Issued in CT

Practice address

415 Killingworth Rd
Higganum, CT 06441-4392

Phone

(860) 345-8535

Fax

(860) 345-8678

NPI assigned

Mar 8, 2006

Last updated

Jul 28, 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 5

Addresses

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in ME, PA, WI, CT4 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 4

Specialty

Internal Medicine

Education

Other, 1983

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Prohealth Physicians PCGroup PAC ID 1355246950, 214 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Middlesex Hospital Hospital, Middletown, CT, CCN 070020

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir-usa.unify.chbase.com/org/calais-879327e9
• Direct secure messaging: wmartin127163@direct.mmc.mainehealth.org

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.

• Prohealth Physicians PC

  • Family Medicine Physician
  • Farmington, CT
  • NPI 1720194053

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Calais Community Hospital

  • Rural Health Clinic/Center
  • Calais, ME
  • NPI 1134200702
  Medicare reassignment NPD
• Mercy Health System Corporation

  dba MHS Physician Services

  • Multi-Specialty Clinic/Center
  • Janesville, WI
  • NPI 1598718603
  Medicare reassignment NPD
• Pinnacle Health Medical Services

  • Family Medicine Physician
  • Harrisburg, PA
  • NPI 1932143427

  Internal Medicine

  Medicare reassignment NPD
• Pinnacle Health Regional Physicians

  • Internal Medicine Physician
  • Harrisburg, PA
  • NPI 1013441690
  Medicare reassignment NPD
• Mainehealth

  dba MaineHealth Pen Bay Hospital

  • General Acute Care Hospital
  • Rockport, ME
  • NPI 1578043378
  NPD
• Mainehealth

  dba Mainehealth Behavioral Health

  • Psychiatric Hospital
  • Westbrook, ME
  • NPI 1790265502
  NPD
• Mercy Health System Corporation

  dba Mercy Hospital Janesville

  • General Acute Care Hospital
  • Janesville, WI
  • NPI 1093768962
  NPD
• Mercy Health System Corporation

  dba Mercy Walworth Hospital and Medical Center

  • Critical Access Hospital
  • Lake Geneva, WI
  • NPI 1699728550
  NPD
• Pinnacle Health Medical Services

  dba UPMC Gastroenterology Associates of Central PA

  • Gastroenterology Physician
  • Mechanicsburg, PA
  • NPI 1295552073
  NPD
• Pinnacle Health Medical Services

  dba UPMC Pinnacle Hillside Primary Care

  • Internal Medicine Physician
  • Hanover, PA
  • NPI 1851879639
  NPD
• Bruce D Fisher DPM PC

  dba Advanced Foot and Ankle Center of MT

  • Foot & Ankle Surgery Podiatrist
  • Great Falls, MT
  • NPI 1285795047
  NPD (past)

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

• Middlesex Hospital

  • General Acute Care Hospital
  • Middletown, CT
  • NPI 1760454334
  Care Compare affiliation

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

{
    "created_epoch": "1141776000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753660800000",
    "number": "1619944600",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "415 KILLINGWORTH RD",
            "city": "HIGGANUM",
            "state": "CT",
            "postal_code": "064414392"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "415 KILLINGWORTH RD",
            "city": "HIGGANUM",
            "state": "CT",
            "postal_code": "064414392",
            "telephone_number": "860-345-8535",
            "fax_number": "860-345-8678"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MARTIN",
        "first_name": "WALTER",
        "middle_name": "E.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-03-08",
        "last_updated": "2025-07-28",
        "certification_date": "2025-07-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MT",
            "license": "9605",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "ME",
            "license": "MD21468",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "MD039667L",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "FL",
            "license": "ME47497",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CT",
            "license": "82557",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "wmartin114791@phsdirect.pinnaclehealth.org",
            "affiliation": "N",
            "address_1": "3141 Cape Horn Rd",
            "city": "Red Lion",
            "state": "PA",
            "country_code": "US",
            "postal_code": "173569071",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "prohealthphysiciansct@optum360.com",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "contentType": "CSV",
            "contentTypeDescription": "CSV",
            "address_1": "415 Killingworth Rd",
            "city": "Higganum",
            "state": "CT",
            "country_code": "US",
            "postal_code": "064414392",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Julie Marie Huston, APRN
• Michael Kalinowski, M.D.
• Melissa Kovacs, LPC
• Sanna Lehtinen Oboma
• Lauren Elizabeth Linn, PH.D.
• Jessica McAllister, PHARMD
• Robert Emmett McCarthy, M.D.
• Gregory McKenna
• Shelby Meadows, RN, IBCLC
• Richard Olson, RPH

• Internal Medicine Physician in Higganum, CT
• Providers in Higganum, CT by specialty
• Internal Medicine Physician in Connecticut

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 28, 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.