1. Home
  2. Directory
  3. Iowa
  4. City
  5. Pediatrics
  6. NPI Profile

DR. DAVID ALAN CLAASSEN MD PHD
NPI 1871892455
Pediatrics - Pediatric Hematology-Oncology in Iowa City, IA

Active since March 22, 2011PECOS Enrolled
200 HAWKINS DR, IOWA CITY, IA 52242(319) 356-3595(319) 356-7659 Get Directions Write a Review

NPPES record last updated: August 21, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. David Alan Claassen Md Phd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DAVID ALAN CLAASSEN MD PHD (NPI 1871892455) is an individual pediatric hematology-oncology provider in Iowa City, Iowa, licensed in Iowa (MD-45319) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1871892455
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. DAVID ALAN CLAASSENCredential: MD PHD
Location Address200 HAWKINS DRIowa City, IA 52242-1009
Mailing Address200 Hawkins DrIowa City, IA 52242-1009 · (319) 356-3595 · Fax (319) 356-7659
Phone(319) 356-3595
Fax(319) 356-7659
Sole ProprietorNo
Enumeration DateMarch 22, 2011
Last NPPES UpdateAugust 21, 2025
NPPES CertifiedAugust 21, 2025
✔ NPI 1871892455 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in IA · MD-45319
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
Also ListedPediatricsTaxonomy 208000000X · License MD-45319 (IA)
Also ListedPediatrics · Neonatal-Perinatal MedicineTaxonomy 2080N0001X · License Q0619 (TX)
200 HAWKINS DR, Iowa City, IA 52242
Open in Google Maps ↗

Secondary Practice Locations 2

Location 15323 Harry Hines BlvdDallas, TX 75390-7208 · Phone (214) 645-0624 · Fax (214) 645-0078
Location 22624 Orchard DrCedar Falls, IA 50613-5845 · Phone (877) 891-5350

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. David Alan Claassen Md Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show David Claassen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

State University Of Iowa
Same address
Dentist
200 HAWKINS DRIVE, 51300 POMERANTZ FAMILY PAVILION
Iowa City, IA 52242
  • Reassigned Medicare billing, Iowa enrollment
  • 2,190 clinicians in this Medicare group
NPI 1114905387 (319) 356-2743

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SANGIL LEE M.D.
Emergency Medicine
200 HAWKINS DR
IOWA CITY, IA 52242
Johnson County (319) 356-2233
RAMI G. EL ABIAD M.D.
Internal Medicine (Gastroenterology)
200 HAWKINS DR
IOWA CITY, IA 52242
Johnson County (319) 356-4901
GRERK SUTAMTEWAGUL MD
Internal Medicine (Hematology & Oncology)
200 HAWKINS DR, DEPT OF INTERNAL MEDICINE
IOWA CITY, IA 52242
Johnson County (319) 356-1616
DR. KALEB TANNER VEIT D.O.
Internal Medicine (Critical Care Medicine)
200 HAWKINS DR
IOWA CITY, IA 52242
Johnson County (319) 356-2320
OMAR JABER M.D
Chronic Disease Hospital
200 HAWKINS DR
IOWA CITY, IA 52242
Johnson County (319) 471-8958
JENNIFER MANCUSO MS, CGC
Genetic Counselor, MS
200 HAWKINS DR, 31663 PFP
IOWA CITY, IA 52242
Johnson County (319) 384-7983
ASHLEY KAISER M.D.
Obstetrics & Gynecology
200 HAWKINS DR, DEPT OF OBGYN
IOWA CITY, IA 52242
Johnson County (319) 356-2294
MRS. NANCY JANE MILLICE
Health Educator
200 HAWKINS DR, 0733 JPP
IOWA CITY, IA 52242
Johnson County (319) 356-3825

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is David Claassen's NPI number?

The NPI number for David Claassen is 1871892455. It was assigned to this individual provider in the NPPES registry on March 22, 2011.

Where is David Claassen located?

David Claassen practices at 200 Hawkins Dr, Iowa City, IA 52242. The listed phone number is (319) 356-3595.

What is David Claassen's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is David Claassen enrolled in Medicare?

Yes. David Claassen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for David Claassen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Claassen reassigns Medicare benefits to State University Of Iowa (Iowa City, IA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for David Claassen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Claassen accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Oscar Insurance Company and 2 other insurers list David Claassen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for David Claassen was last updated on August 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.