David Alan Claassen, MD PHD
Pediatric Hematology & Oncology Physician · Iowa City, IA
David Alan Claassen, MD PHD is a pediatric hematology & oncology physician with a practice address in Iowa City, Iowa, and NPI 1871892455, issued on Mar 22, 2011. Check the license (Iowa MD-45319, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- David Alan Claassen
- Credential
- MD PHD
- Primary taxonomy
- Pediatric Hematology & Oncology Physician 2080P0207X
- License numbers
- MD-45319 IA
Q0619 TX
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 356-3595
- Enumerated
- Mar 22, 2011
- Record last updated
- Aug 21, 2025
- Fax
- (319) 356-7659
- Medicare enrollment
- Enrolled (PECOS I20180716002565); accepts Medicare assignment
- Medical or professional school
- University Of Nebraska College Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest pediatric hematology & oncology physician records → All 30 in Iowa → Look up another NPI →
Also registered at 200 Hawkins Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Alan Claassen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-45319Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average pediatric hematology & oncology physician in 2024
12 Medicare Part D claims, against an average of 94 among the 300 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- State University OF IowaIowa City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Alan Claassen among 30 pediatric hematology & oncology physician records in Iowa
David Alan Claassen, MD PHD is one of 30 pediatric hematology & oncology physician records with a practice address in Iowa. 57% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 53% of them.
- NPI issued2011 · 53% of these records are older, 40% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2011 · median 2012 among the 13 with a school on file
- Record last updated2025 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0207X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Hematology & Oncology Physician providers in Iowa
There are 30 pediatric hematology & oncology physician records in Iowa.
All 30 in Iowa → Every provider in Iowa City → Pediatric Hematology & Oncology Physician nationwide →
The 8 pediatric hematology & oncology physician records with the nearest ZIP codes
- Beeling Armijo, M.D.Iowa City, IA 522421447549704
- David Dickens, MDIowa City, IA 522421720058092
- Jenna Gedminas, M.D.Iowa City, IA 522421639516768
- David Gordon, MDIowa City, IA 522421336321330
- Michael Halyko, MDIowa City, IA 522421134501745
- Sara Horton, M.D.Iowa City, IA 522421902268592
- Vasundhara Posavanike Kailasnath, M.DIowa City, IA 522421134312549
- Anjali Sharathkumar, MDIowa City, IA 522421194945691
Common questions
What is David Alan Claassen, MD PHD's NPI number?
David Alan Claassen, MD PHD's National Provider Identifier (NPI) is 1871892455, issued on Mar 22, 2011. An NPI identifies a provider in billing; it is not a license.
Where is David Alan Claassen, MD PHD located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 356-3595. Providers update this record themselves, so call before visiting.
How can I verify David Alan Claassen, MD PHD's license?
NPPES lists Iowa license number MD-45319, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does David Alan Claassen, MD PHD prescribe under Medicare Part D?
In 2024, David Alan Claassen, MD PHD had 12 Medicare Part D claims; the average among pediatric hematology & oncology physician prescribers was 94. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.