Evan James Diehl, M.D.
Internal Medicine Physician · Cedar Rapids, IA
Evan James Diehl, M.D. is an internal medicine physician with a practice address in Cedar Rapids, Iowa, and NPI 1255626925, issued on Jun 10, 2011. Check the license (Iowa R9165, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Evan James Diehl
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R9165 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1026 A Ave NE, Cedar Rapids, IA 52402
- Phone
- (319) 369-7995
- Enumerated
- Jun 10, 2011
- Record last updated
- Jun 24, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140616000496); accepts Medicare assignment
- Medical or professional school
- University Of Iowa, Rj & L Carver College Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 871 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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Verify Evan James Diehl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license R9165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
191 Medicare Part D claims for 78 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
- Iowa Physicians Clinic Medical FoundationCedar Rapids, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Evan James Diehl among 871 internal medicine physician records in Iowa
Evan James Diehl, M.D. 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 2011, is newer than 48% of them.
- NPI issued2011 · 48% of these records are older, 51% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 44% of these records are
- Graduated2011 · median 2008 among the 386 with a school on file
- Record last updated2014 · 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).
33 internal medicine physician records list a practice address in Cedar Rapids
They are 33 of the 2,949 NPPES records with a practice address in Cedar Rapids, and 871 internal medicine physician records in Iowa.
All 871 in Iowa → Every provider in Cedar Rapids → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mushtaq Ali, MDCedar Rapids, IA 524021457655979
- Todd Butler, MDCedar Rapids, IA 524021710964994
- Dianna Edwards, M.D.Cedar Rapids, IA 524021770877466
- Amanda Gould, DOCedar Rapids, IA 524021982867628
- James Justice, MDCedar Rapids, IA 524021588642128
- Muhammad Arslan Arif Maan, MBBSCedar Rapids, IA 524021851953376
- Ronald Reider, MDCedar Rapids, IA 524021386623163
- Natalie Ross, MDCedar Rapids, IA 524021801536115
Common questions
What is Evan James Diehl, M.D.'s NPI number?
Evan James Diehl, M.D.'s National Provider Identifier (NPI) is 1255626925, issued on Jun 10, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Evan James Diehl, M.D. located?
The NPPES record lists a practice address at 1026 A Ave NE, Cedar Rapids, IA, 52402. Phone: (319) 369-7995. Providers update this record themselves, so call before visiting.
How can I verify Evan James Diehl, M.D.'s license?
NPPES lists Iowa license number R9165, 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 Evan James Diehl, M.D. prescribe under Medicare Part D?
In 2024, Evan James Diehl, M.D. had 191 Medicare Part D claims for 78 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.