Mackenzie L. Walhof, MD
Internal Medicine Physician · Iowa City, IA
Mackenzie L. Walhof, MD is an internal medicine physician with a practice address in Iowa City, Iowa, and NPI 1588301907, issued on May 17, 2022. Check the license (Iowa MD-54664, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mackenzie L. Walhof
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD-54664 IA
R-12470 IA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 356-2034
- Enumerated
- May 17, 2022
- Record last updated
- Jul 7, 2025
- Fax
- (319) 384-8955
- Medicare enrollment
- Enrolled (PECOS I20250712000357); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 871 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 Mackenzie L. Walhof in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-54664Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
28 Medicare Part D claims for 11 beneficiaries, against an average of 3,176 among the 108,855 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).
Mackenzie L. Walhof among 871 internal medicine physician records in Iowa
Mackenzie L. Walhof, MD is one of 871 internal medicine physician records with a practice address in Iowa. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 73% of them.
- NPI issued2022 · 73% of these records are older, 22% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 44% of these records are
- Graduated2022 · median 2008 among the 386 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
215 internal medicine physician records list a practice address in Iowa City
They are 215 of the 7,163 NPPES records with a practice address in Iowa City, and 871 internal medicine physician records in Iowa.
All 871 in Iowa → Every provider in Iowa City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Thad Abrams, MDIowa City, IA 522421326022385
- Susan Beebout, MDIowa City, IA 522421790767127
- Christopher Goerdt, MDIowa City, IA 522421548258163
- William Haynes, MDIowa City, IA 522421083602601
- William Iverson, MDIowa City, IA 522421346238904
- Peter Kaboli, MDIowa City, IA 522421518949940
- David Katz, MDIowa City, IA 522421023090321
- Ann Machlab, MDIowa City, IA 522421780668004
Common questions
What is Mackenzie L. Walhof, MD's NPI number?
Mackenzie L. Walhof, MD's National Provider Identifier (NPI) is 1588301907, issued on May 17, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Mackenzie L. Walhof, MD located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 356-2034. Providers update this record themselves, so call before visiting.
How can I verify Mackenzie L. Walhof, MD's license?
NPPES lists Iowa license number MD-54664, 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 Mackenzie L. Walhof, MD prescribe under Medicare Part D?
In 2024, Mackenzie L. Walhof, MD had 28 Medicare Part D claims for 11 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.