CHARLES MICHAEL KNUDSON MD
NPI 1144218926
Pathology - Blood Banking & Transfusion Medicine in Iowa City, IA

Q: What is Charles Knudson's NPI number?

The NPI number for Charles Knudson is 1144218926. It was assigned to this individual provider in the NPPES registry on October 6, 2005. The provider is also known as C Michael Knudson MD.

Q: What is Charles Knudson's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Blood Banking & Transfusion Medicine, with taxonomy code 207ZB0001X.

Q: When was this NPI record last updated?

The NPPES record for Charles Knudson was last updated on December 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since October 06, 2005PECOS EnrolledAccepts Medicare Assignment

200 HAWKINS DR, IOWA CITY, IA 52242(319) 335-8147(319) 335-8453 Get Directions Write a Review

NPPES record last updated: December 16, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Charles Michael Knudson Md NPPES

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

CHARLES MICHAEL KNUDSON MD (NPI 1144218926) is an individual blood banking & transfusion medicine provider in Iowa City, Iowa, licensed in Iowa (MD-32575) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with University Of Iowa Hospital & Clinics, and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (1992).

NPPES Registry Identity

NPI1144218926

Entity TypeIndividualMale

Primary Taxonomy207ZB0001X

Provider Legal NameCHARLES MICHAEL KNUDSONCredential: MD

Location Address200 HAWKINS DRIowa City, IA 52242-1009

Mailing Address200 Hawkins DrIowa City, IA 52242-1009 · (319) 335-8147 · Fax (319) 335-8453

Phone(319) 335-8147

Fax(319) 335-8453

Sole ProprietorNo

Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 1992

Enumeration DateOctober 6, 2005

Last NPPES UpdateDecember 16, 2025

NPPES CertifiedDecember 16, 2025

✔ NPI 1144218926 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Blood Banking & Transfusion MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207ZB0001X

License✔ Licensed in IA · MD-32575

Definition

A physician who specializes in blood banking/transfusion medicine is responsible for the maintenance of an adequate blood supply, blood donor and patient-recipient safety and appropriate blood utilization. Pre-transfusion compatibility testing and antibody testing assure that blood transfusions, when indicated, are as safe as possible. This physician directs the preparation and safe use of specially prepared blood components, including red blood cells, white blood cells, platelets and plasma constituents, and marrow or stem cells for transplantation.

200 HAWKINS DR, Iowa City, IA 52242

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Other Names 1

Professional Name (2)C Michael Knudson Md

Other Identifiers 4

Medicaid0180018IA

Medicaid1180018IA

Other33941IA · Wellmark Bcbs

Other46327IA · Wellmark Bcbs

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Charles Michael Knudson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476682352

PECOS Enrollment IDI20100602000847

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.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Blood bank physician services with written report 86079

A blood bank physician service involves a specialized doctor overseeing all aspects of blood collection, storage, and transfusion. They ensure the process is safe and effective. A written report details all procedures and findings for your reference and understanding.

64 services63 patients

Blood bank physician services for cross match and/or evaluation and written report 86077

Blood bank physician services for cross match involve testing your blood against donor blood to ensure compatibility before a transfusion. The evaluation includes a detailed analysis of your blood type and antibodies. A written report will be provided, summarizing the findings.

33 services31 patients

Collection of stem cells for transplantation 38206

Stem cells for transplantation are typically collected from your bloodstream in a process known as apheresis. It involves circulating your blood through a machine that separates out stem cells, returning the rest of the blood to your body. It's a non-surgical, outpatient procedure.

23 services18 patients

Pathology clinical consultation for moderately complex clinical problem, 21-40 minutes 80504

A pathology clinical consultation for a moderately complex problem involves a 21-40 minute discussion with a pathologist. The pathologist reviews your medical history, examines your test results, and provides insights about your health condition. They help in understanding your ailment better and suggest appropriate treatment options.

18 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of Iowa Hospital & Clinics

Acute Care Hospitals · Iowa City, IA

3/5 CMS rating

OwnershipGovernment - State

CMS Certification Number160058

Location200 Hawkins DriveIowa City, IA 52242 · Johnson County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52242 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$122.23 typical visit price

range $52.96 – $161.40

Typical copayment $30.55 (range $13.24 – $40.35)

Most-billed visit code 99204

Established Patient

$94.05 typical visit price

range $16.91 – $131.98

Typical copayment $23.51 (range $4.22 – $32.99)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Charles Knudson's NPI number?

The NPI number for Charles Knudson is 1144218926. It was assigned to this individual provider in the NPPES registry on October 6, 2005. The provider is also known as C Michael Knudson MD.

Where is Charles Knudson located?

Charles Knudson practices at 200 Hawkins Dr, Iowa City, IA 52242. The listed phone number is (319) 335-8147.

What is Charles Knudson's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Blood Banking & Transfusion Medicine, with taxonomy code 207ZB0001X.

Is Charles Knudson enrolled in Medicare?

Yes. Charles Knudson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Charles Knudson accept?

Health plans from Medica list Charles Knudson 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.

Is Charles Knudson affiliated with any hospitals?

According to CMS data, Charles Knudson is affiliated with University Of Iowa Hospital & Clinics.

When was this NPI record last updated?

The NPPES record for Charles Knudson was last updated on December 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.