David Alan Claassen, MD PHD

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

MD-45319 Issued in IA

Practice address

200 Hawkins Dr
Iowa City, IA 52242-1009

Phone

(319) 356-3595

Fax

(319) 356-7659

NPI assigned

Mar 22, 2011

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in IA

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

Specialty

Hematology/OncologyAlso: Pediatric Medicine

Education

University of Nebraska College of Medicine, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

State University of IowaGroup PAC ID 7618884230, 1,886 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

80.02 of 100Reported as group

Quality

75.68

Promoting interoperability

78

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: dclaassen145370@uihcdirect.org

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.

• State University of Iowa

  • Family Medicine Physician
  • Iowa City, IA
  • NPI 1477554814

  Pediatrics

  Medicare reassignment Care Compare group NPD
• Floyd County Memorial Hospital Commission

  • Critical Access Hospital
  • Charles City, IA
  • NPI 1265402390
  NPD (past)
• State University of Iowa

  • Student Health Clinic/Center
  • Iowa City, IA
  • NPI 1285635664
  NPD (past)
• State University of Iowa

  • General Acute Care Hospital
  • Iowa City, IA
  • NPI 1376544320
  NPD (past)

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

{
    "created_epoch": "1300752000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755734400000",
    "number": "1871892455",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 HAWKINS DR",
            "city": "IOWA CITY",
            "state": "IA",
            "postal_code": "522421009",
            "telephone_number": "319-356-3595",
            "fax_number": "319-356-7659"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 HAWKINS DR",
            "city": "IOWA CITY",
            "state": "IA",
            "postal_code": "522421009",
            "telephone_number": "319-356-3595",
            "fax_number": "319-356-7659"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5323 Harry Hines Blvd",
            "address_purpose": "LOCATION",
            "city": "Dallas",
            "state": "TX",
            "postal_code": "753907208",
            "country_code": "US",
            "telephone_number": "214-645-0624",
            "fax_number": "214-645-0078",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "5323 Harry Hines Blvd",
            "address_purpose": "LOCATION",
            "city": "Dallas",
            "state": "TX",
            "postal_code": "753907208",
            "country_code": "US",
            "telephone_number": "214-645-0624",
            "fax_number": "214-645-0078",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2624 Orchard Dr",
            "address_purpose": "LOCATION",
            "city": "Cedar Falls",
            "state": "IA",
            "postal_code": "506135845",
            "country_code": "US",
            "telephone_number": "877-891-5350",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CLAASSEN",
        "first_name": "DAVID",
        "middle_name": "ALAN",
        "name_prefix": "Dr.",
        "credential": "MD PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2011-03-22",
        "last_updated": "2025-08-21",
        "certification_date": "2025-08-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "IA",
            "license": "MD-45319",
            "primary": true
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "IA",
            "license": "MD-45319",
            "primary": false
        },
        {
            "code": "2080N0001X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Neonatal-Perinatal Medicine",
            "state": "TX",
            "license": "Q0619",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jacqueline Cicchese, PHARMD
• John Michael Cilek, TLMFT
• Toni L Cilek, M.A., CCC-SLP
• Heather Marie Ciliberto, MD
• Michael Anthony Ciliberto, MD
• Gerald H Clamon, MD
• Gerard Patrick Clancy, MD
• James M S Clancy, BS DDS MS
• Susan Clarahan, RD, LD
• Clarity Counseling Services LLC

• Pediatric Hematology & Oncology Physician in Iowa City, IA
• Providers in Iowa City, 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 Aug 21, 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.