Nancy Collins O'Brien, MD

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

29316 Issued in IA

Practice address

Ottumwa Pediatrics
931 Pennsylvania Ave
Ottumwa, IA 52501

Phone

(641) 684-3000

Fax

(641) 684-2469

NPI assigned

Aug 30, 2005

Sex

Female

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 5

Other names 1

• Nancy Ann Collins Former name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1125360000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1770576373",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "OTTUMWA PEDIATRICS",
            "address_2": "931 PENNSYLVANIA AVE",
            "city": "OTTUMWA",
            "state": "IA",
            "postal_code": "52501",
            "telephone_number": "641-684-3000",
            "fax_number": "641-684-2469"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "OTTUMWA PEDIATRICS",
            "address_2": "931 PENNSYLVANIA AVE",
            "city": "OTTUMWA",
            "state": "IA",
            "postal_code": "52501",
            "telephone_number": "641-684-3000",
            "fax_number": "641-684-2469"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'BRIEN",
        "first_name": "NANCY",
        "middle_name": "COLLINS",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2005-08-30",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "IA",
            "license": "29316",
            "primary": false
        },
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "IA",
            "license": "29316",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "JOHN DEERE HEALTH",
            "identifier": "42068106032",
            "state": "IA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "0098012",
            "state": "IA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TRIWEST",
            "identifier": "G004",
            "state": "IA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "IOWA HEALTH SOLUTIONS",
            "identifier": "37875",
            "state": "IA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "WELLMARK INC BCBS OF IA",
            "identifier": "51222",
            "state": "IA"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "NANCY",
            "last_name": "COLLINS",
            "middle_name": "ANN",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Cindy Nelson
• Linh Yen Nguyen, PT, DPT
• Kyle Nicholson, DDS
• Nathan Allan Nicholson
• Juanita M O'Brien, ARNP
• Michael John Olmstead, DDS
• Omaha Vamc
• Edward Brian Ortell, DO
• Grady Orwig
• Osceola Vision Center P.C.

• Pediatric Hematology & Oncology Physician in Ottumwa, IA
• Providers in Ottumwa, IA by specialty
• Pediatric Hematology & Oncology Physician in Iowa

• 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.