Samuel Lewis Johnston, M.D.
Clinical Cardiac Electrophysiology Physician · Iowa City, IA
Samuel Lewis Johnston, M.D. is a clinical cardiac electrophysiology physician with a practice address in Iowa City, Iowa, and NPI 1184832271, issued on May 20, 2007. Check the license (Iowa MD-42224, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Samuel Lewis Johnston
- Credential
- M.D.
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License numbers
- MD-42224 IA
MD-4224 IA
036-114065 IL
036114065 IL
MD153947 OR
Self-reported in NPPES; status is on the state search - Practice location
- 200 Hawkins Dr, Iowa City, IA 52242
- Phone
- (319) 356-3689
- Enumerated
- May 20, 2007
- Record last updated
- Dec 12, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicaid ID
- 036114065 IL
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 42 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 Samuel Lewis Johnston in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-42224Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
185 Medicare Part D claims for 49 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Eliquis28 claims
- Flecainide Acetate17 claims
- Metoprolol Succinate17 claims
- Carvedilol16 claims
- Amiodarone Hcl12 claims
- Dofetilide12 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.
Industry payments in 2024: $1,544.08
29 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 3,167 providers of this specialty with any payment received $10,651.37 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.
Samuel Lewis Johnston among 42 clinical cardiac electrophysiology physician records in Iowa
Samuel Lewis Johnston, M.D. is one of 42 clinical cardiac electrophysiology physician records with a practice address in Iowa. 95% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 43% newer
- In a Medicare fileYes · 95% of these records are
- In the CMS Doctors and Clinicians fileNo · 79% of these records are
- Record last updated2016 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0001X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Iowa
There are 42 clinical cardiac electrophysiology physician records in Iowa.
All 42 in Iowa → Every provider in Iowa City → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Oluwaseun Adeola, MBCHBIowa City, IA 522421518306463
- Hina Amin, MBBSIowa City, IA 522421013440429
- Sean Byrnes, MDIowa City, IA 522421154818193
- Sergio Conti, MDIowa City, IA 522421659172690
- Paari Dominic, M.B.B.S.Iowa City, IA 522421134328958
- Peter Farjo, MD, MSIowa City, IA 522421144615469
- David Hamon, MDIowa City, IA 522421487317061
- Denice Hodgson-Zingman, M.D.Iowa City, IA 522421497729271
Common questions
What is Samuel Lewis Johnston, M.D.'s NPI number?
Samuel Lewis Johnston, M.D.'s National Provider Identifier (NPI) is 1184832271, issued on May 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Samuel Lewis Johnston, M.D. located?
The NPPES record lists a practice address at 200 Hawkins Dr, Iowa City, IA, 52242. Phone: (319) 356-3689. Providers update this record themselves, so call before visiting.
How can I verify Samuel Lewis Johnston, M.D.'s license?
NPPES lists Iowa license number MD-42224, 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 Samuel Lewis Johnston, M.D. prescribe under Medicare Part D?
In 2024, Samuel Lewis Johnston, M.D. had 185 Medicare Part D claims for 49 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. 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.