Mark M. Zittergruen, MD
Pediatric Cardiology Physician · Cedar Rapids, IA
Mark M. Zittergruen, MD is a pediatric cardiology physician with a practice address in Cedar Rapids, Iowa, and NPI 1851312557, issued on Jul 21, 2006. Check the license (Iowa 28303, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark M. Zittergruen
- Credential
- MD
- Primary taxonomy
- Pediatric Cardiology Physician 2080P0202X
- License number
- 28303 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1026 A Ave NE, Cedar Rapids, IA 52402
- Phone
- (319) 368-5757
- Enumerated
- Jul 21, 2006
- Record last updated
- Oct 13, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050815000584); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest pediatric cardiology physician records → All 38 in Iowa → Look up another NPI →
Also registered at 1026 A Ave NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Sayeed Ahmed, MDFamily Medicine Physician1609229657
- Mushtaq Ali, MDInternal Medicine Physician1457655979
- Thomas Amosson, MDHospitalist Physician1942670179
Verify Mark M. Zittergruen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 28303Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% fewer Medicare Part D claims than the average pediatric cardiology physician in 2024
65 Medicare Part D claims, against an average of 74 among the 518 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Rosuvastatin Calcium20 claims
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
- Mercy Medical CenterCedar Rapids, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark M. Zittergruen among 38 pediatric cardiology physician records in Iowa
Mark M. Zittergruen, MD is one of 38 pediatric cardiology physician records with a practice address in Iowa. 68% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 29% of them.
- NPI issued2006 · 29% of these records are older, 58% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1988 · median 2004 among the 20 with a school on file
- Record last updated2011 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0202X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Cardiology Physician providers in Iowa
There are 38 pediatric cardiology physician records in Iowa.
All 38 in Iowa → Every provider in Cedar Rapids → Pediatric Cardiology Physician nationwide →
The 8 pediatric cardiology physician records with the nearest ZIP codes
- Dilli Bhurtel, MDCedar Rapids, IA 524021952721409
- Abdullah Abu-Aqoulah, MBBSIowa City, IA 522421144906116
- Stephanie Acosta, MDIowa City, IA 522421609261718
- Natasha Gonzalez Estevez, M.D.Iowa City, IA 522421285074799
- Ashlee Graham, DOIowa City, IA 522421598323917
- Benjamin Hale, MDIowa City, IA 522421124464599
- Aaron Heaps, MDIowa City, IA 522421285263137
- Rachel Henning, MDIowa City, IA 522421881155158
Common questions
What is Mark M. Zittergruen, MD's NPI number?
Mark M. Zittergruen, MD's National Provider Identifier (NPI) is 1851312557, issued on Jul 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark M. Zittergruen, MD located?
The NPPES record lists a practice address at 1026 A Ave NE, Cedar Rapids, IA, 52402. Phone: (319) 368-5757. Providers update this record themselves, so call before visiting.
How can I verify Mark M. Zittergruen, MD's license?
NPPES lists Iowa license number 28303, 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 Mark M. Zittergruen, MD prescribe under Medicare Part D?
In 2024, Mark M. Zittergruen, MD had 65 Medicare Part D claims; the average among pediatric cardiology physician prescribers was 74. 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.