Matthew James Oelstrom, M.D.

Primary specialty

Pediatric Critical Care Medicine PhysicianTaxonomy code 2080P0203X

License

56720 Issued in WI

Practice address

1000 N Oak Ave
Marshfield, WI 54449-5703

Phone

(715) 387-5511

NPI assigned

Apr 8, 2010

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in WI

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

Interoperability endpoints

• Direct secure messaging: matthew.oelstrom@marshfieldclinichealthsystem.cernerdirect.com

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.

• Beaver Dam Community Hospitals Inc

  dba Marshfield Medical Center - Beaver Dam Professional Services

  • Clinic/Center
  • Beaver Dam, WI
  • NPI 1972188555
  Medicare reassignment
• Flambeau Hospital Inc

  dba MMC - Park Falls Outreach Services

  • Clinic/Center
  • Park Falls, WI
  • NPI 1194317966
  Medicare reassignment
• Flambeau Hospital Inc

  dba Marshfield Medical Center - Park Falls

  • Critical Access Hospital
  • Park Falls, WI
  • NPI 1700963048
  Medicare reassignment
• Lakeview Medical Center Inc of Rice Lake

  dba Marshfield Medical Center - Rice Lake Professional Services

  • Clinic/Center
  • Rice Lake, WI
  • NPI 1093201832
  Medicare reassignment
• Marshfield Clinic Inc

  dba Marshfield Clinic Florida Teleradiology/Telehealth

  • Clinic/Center
  • Marshfield, WI
  • NPI 1952347981
  Medicare reassignment
• MCHS Hospitals Inc

  dba Marshfield Medical Center

  • Clinic/Center
  • Marshfield, WI
  • NPI 1093221434
  Medicare reassignment
• MCHS Hospitals Inc

  dba Marshfield Medical Center - Ladysmith

  • Critical Access Hospital
  • Ladysmith, WI
  • NPI 1952890873
  Medicare reassignment
• Memorial Hospital Inc

  dba Marshfield Medical Center - Neillsville

  • Critical Access Hospital
  • Neillsville, WI
  • NPI 1346239373
  Medicare reassignment
• Memorial Hospital Inc

  dba Marshfield Medical Center - Neillsville Clinic

  • Rural Health Clinic/Center
  • Neillsville, WI
  • NPI 1619966793
  NPD (past)

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

{
    "created_epoch": "1270684800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774310400000",
    "number": "1164748687",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1000 N OAK AVE",
            "city": "MARSHFIELD",
            "state": "WI",
            "postal_code": "544495703",
            "telephone_number": "715-387-5511"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1000 N OAK AVE",
            "city": "MARSHFIELD",
            "state": "WI",
            "postal_code": "544495703",
            "telephone_number": "715-387-5511"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "9000 W Wisconsin Ave",
            "address_2": "Pediatric Critical Care",
            "address_purpose": "LOCATION",
            "city": "Milwaukee",
            "state": "WI",
            "postal_code": "532264874",
            "country_code": "US",
            "telephone_number": "414-266-3360",
            "fax_number": "414-266-3563",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OELSTROM",
        "first_name": "MATTHEW",
        "middle_name": "JAMES",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-04-08",
        "last_updated": "2026-03-24",
        "certification_date": "2026-03-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "WI",
            "license": "56720",
            "primary": false
        },
        {
            "code": "2080P0203X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Critical Care Medicine",
            "state": "WI",
            "license": "56720",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1164748687",
            "state": "WI"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "him@marshfieldclinichealthsystem.cernerdirect.com",
            "affiliation": "N",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "address_1": "1000 N Oak Ave",
            "city": "Marshfield",
            "state": "WI",
            "country_code": "US",
            "postal_code": "544495703",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "him@marshfieldclinichealthsystem.cernerdirect.com",
            "affiliation": "N",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "address_1": "9000 W Wisconsin Ave",
            "address_2": "Pediatric Critical Care",
            "city": "Milwaukee",
            "state": "WI",
            "country_code": "US",
            "postal_code": "532264874",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Michael Oberg, MD
• Kristen M Obernberger, RN
• Rachel Marie Occhiogrosso, MD
• Kate Oconnor, NP
• Katharine Hobart Odell, PHD, CCC-SLP
• Rebekah A. Oetken, R.N.
• Kelsie-Marie Offenwanger, PSY.D
• Jane Marie Ohde, DO
• Adaora Chinenye Okoli, MD
• Jennifer Okon, R.D., C.D.E., C.D.

• Pediatric Critical Care Medicine Physician in Marshfield, WI
• Providers in Marshfield, WI by specialty
• Pediatric Critical Care Medicine Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 24, 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.