Marianne Sarah Koenig, M.D.

Primary specialty

Pediatric Adolescent Medicine PhysicianTaxonomy code 2080A0000X

License

50001 Issued in MA

Practice address

449 Route 130
Sandwich, MA 02563-2339

Phone

(508) 888-8430

Fax

(508) 888-6673

NPI assigned

Apr 11, 2006

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 7

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: marianne.koenig.1@12354.direct.athenahealth.com
• FHIR API: https://api.platform.athenahealth.com/12354/brand/1/csg/1/fhir/r4

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.

• Sandwich Pediatrics

  • Pediatric Adolescent Medicine Physician
  • Sandwich, MA
  • NPI 1497960215
  NPD (past) Authorized official

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

{
    "created_epoch": "1144713600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1619930559",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "449 ROUTE 130",
            "city": "SANDWICH",
            "state": "MA",
            "postal_code": "025632339",
            "telephone_number": "508-888-8430",
            "fax_number": "508-888-6673"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "449 ROUTE 130",
            "city": "SANDWICH",
            "state": "MA",
            "postal_code": "025632339",
            "telephone_number": "508-888-8430",
            "fax_number": "508-888-6673"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KOENIG",
        "first_name": "MARIANNE",
        "middle_name": "SARAH",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-04-11",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080A0000X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Adolescent Medicine",
            "state": "MA",
            "license": "50001",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CHILDRENS MEDICAL SECURIT",
            "identifier": "28345",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TRICARE",
            "identifier": "S011190",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HARVARD PILGRIM HEALTH CA",
            "identifier": "20140",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS BLUE SHIELD",
            "identifier": "KOJO4544",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "UNITED HEALTHCARE",
            "identifier": "1200958",
            "state": "MA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3000532",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "4849274",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Theodore Jellinek, MD
• John H. Lewis, M.D., Inc.
• John L. Peterman, D.M.D., Inc.
• John Anthony Kambouris
• Patrick Kerr
• Kristen Weber, DC
• Mary Ann Labue, ED.D.
• Robert E Ledwith, PA
• Stephanie Lehtonen, MS, CCC-SLP
• Li Li, MD

• Pediatric Adolescent Medicine Physician in Sandwich, MA
• Providers in Sandwich, MA by specialty
• Pediatric Adolescent Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.