Charles Michael Knudson, MD
Blood Banking & Transfusion Medicine Physician · Iowa City, IA
Charles Michael Knudson, MD is a blood banking & transfusion medicine physician with a practice address in Iowa City, Iowa, and NPI 1144218926, issued on Oct 6, 2005. Check the license (Iowa MD-32575, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Charles Michael Knudson
- Credential
- MD
- Primary taxonomy
- Blood Banking & Transfusion Medicine Physician 207ZB0001X
- License number
- MD-32575 IA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 335-8147
- Enumerated
- Oct 6, 2005
- Record last updated
- Dec 16, 2025
- Fax
- (319) 335-8453
- Medicaid IDs
- 0180018 IA
1180018 IA - Medicare enrollment
- Enrolled (PECOS I20100602000847); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1992
- Entity
- Type 1 · individual
4 nearest blood banking & transfusion medicine physician records → All 5 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.
- Helena Aaberg, MDAnesthesiology Physician1689301558
- Abdullah Abbasi, MDGastroenterology Physician1932944204
- Mary Jo Abbott, RPHPharmacist1841325875
- Francois Abboud, MDCardiovascular Disease Physician1598753113
- Abdalla Abdalla, MBBCHAnatomic Pathology & Clinical Pathology Physician1518859826
- Sameh AbdallaAnatomic Pathology & Clinical Pathology Physician1437902160
Verify Charles Michael Knudson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-32575Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $4,652.20
2 payments; by number, the most common kind was food and beverage; the largest payer was Terumo Bct, Inc. The 104 providers of this specialty with any payment received $16,216.46 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
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).
Blood Banking & Transfusion Medicine Physician providers in Iowa
There are 5 blood banking & transfusion medicine physician records in Iowa.
All 5 in Iowa → Every provider in Iowa City → Blood Banking & Transfusion Medicine Physician nationwide →
The 4 blood banking & transfusion medicine physician records with the nearest ZIP codes
- John Blau, MDIowa City, IA 522421871757690
- Meredith Parsons, MDIowa City, IA 522421497247662
- Annette Schlueter, MDIowa City, IA 522421497743686
- Keith Smith, D.O.Des Moines, IA 503091669792727
Common questions
What is Charles Michael Knudson, MD's NPI number?
Charles Michael Knudson, MD's National Provider Identifier (NPI) is 1144218926, issued on Oct 6, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles Michael Knudson, MD located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 335-8147. Providers update this record themselves, so call before visiting.
How can I verify Charles Michael Knudson, MD's license?
NPPES lists Iowa license number MD-32575, 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.
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.