Mark Shannon, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD7250 Issued in RI

Practice address

42 Lincoln Ave
Barrington, RI 02806-2136

Phone

(401) 246-0389

NPI assigned

Oct 25, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in RI

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 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Prospect Chartercare Sjhsri, LLC

  • Internal Medicine Physician
  • North Providence, RI
  • NPI 1588089759
  Medicare reassignment NPD
• Prospect Chartercare Sjhsri, LLC

  • General Acute Care Hospital
  • North Providence, RI
  • NPI 1871918870
  NPD

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

{
    "created_epoch": "1161734400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781222400000",
    "number": "1508941089",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "42 LINCOLN AVE",
            "city": "BARRINGTON",
            "state": "RI",
            "postal_code": "028062136",
            "telephone_number": "401-246-0389"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "42 LINCOLN AVE",
            "city": "BARRINGTON",
            "state": "RI",
            "postal_code": "028062136",
            "telephone_number": "401-246-0389"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2090 Wallum Lake Rd",
            "address_purpose": "LOCATION",
            "city": "Pascoag",
            "state": "RI",
            "postal_code": "028591813",
            "country_code": "US",
            "telephone_number": "401-567-5400",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SHANNON",
        "first_name": "MARK",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-10-25",
        "last_updated": "2026-06-12",
        "certification_date": "2026-06-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "RI",
            "license": "MD7250",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Helmut Michael Sefranek, DMD, MAGD
• Serra Physical Therapy, LLC
• Kimberly M Serra, PT, DPT, MTC, CSCS
• Lisa M Sestito
• Alisha Lachmi Shankar, RN
• Kaela Sherman, CCC-SLP
• Laura R. Silverman, LMHC
• Anna Silvia, LMHC
• Marilia Simas-Whyte, RN
• Rachel A Simmons, PH.D.

• Internal Medicine Physician in Barrington, RI
• Providers in Barrington, RI by specialty
• Internal Medicine Physician in Rhode Island

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 12, 2026; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.