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Edit this profileAt a glance
- 200 Hawkins Dr, E315Gh, Iowa City, IA 52242
About Dr. Johnston
Samuel L. Johnston, M.D. is a healthcare provider in Iowa City, IA specializing in clinical cardiac electrophysiology. Samuel is also listed as specializing in internal medicine and cardiovascular disease. Medicare claims data shows Samuel provided 346 services to 326 patients. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, electrocardiogram (ecg) 2-day continuous with review by health care professional, and electrocardiogram (ecg) up to 30 days continuous with symptom monitoring, transmission and review and report by health care professional. This provider record is associated with NPI 1184832271.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (319) 356-3689
- Email not available
Practice Locations
200 HAWKINS DR E315GH
Iowa City, IA 52242
Conditions Commonly Evaluated or Treated
Within Clinical Cardiac Electrophysiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Abnormal heart rhythms
Conduction disorders
Dangerous heart rhythms
Device issues
Fainting & reflex disorders
Genetic heart conditions
- Brugada Syndrome
- Catecholaminergic Polymorphic Ventricular Tachycardia
- Arrhythmogenic Right Ventricular Dysplasia
- Long QT syndrome
Heart failure and muscle
Heart muscle conditions
Heart rhythm disorders
Inherited rhythm disorders
Structural heart conditions
Symptoms
- Dizziness and Lightheadedness
- Fainting and syncope
- Heart palpitations
- Premature ventricular contractions
- Slow heart rate (bradycardia)
Most searched conditions
Autonomic disorders
Device complications
Procedures & services
Advanced therapies
Catheter ablation
- AV Node Ablation
- Cardioneuroablation
- Epicardial Catheter Ablation
- Heart Flutter Ablation
- Pulsed Field Ablation
- PVC Ablation
- Ventricular Tachycardia Ablation
- Cryoablation
Device care
Device management
Device placement
Device procedures
- Cardiac resynchronization therapy device placement
- Conduction System Pacing
- Leadless Pacemaker Placement
- Pacemaker Battery Replacement
- Pacemaker Lead Removal
- Subcutaneous Defibrillator Placement
- Implantable cardioverter-defibrillator placement
Diagnostic imaging
Diagnostic monitoring
Diagnostic testing
Diagnostic tests
- 30-Day Cardiac Event Monitor
- Electrophysiology study
- Genetic Arrhythmia Testing
- Heart monitor
- Implantable Loop Recorder (Cardiac Monitor Implant)
- Tilt Table Test
- Wearable Heart Patch Monitor
External devices
Medication management
Minor device procedures
Most searched procedures
- AFib ablation
- Angioplasty and stenting
- Cardiac catheterization
- Pacemaker implantation
- Watchman procedure
Heart rhythm treatments
Rhythm restoration
Stroke prevention
Procedures Most Often Billed to Medicare
346 services · 326 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
185 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Electrocardiogram (ecg) 2-day continuous with review by health care professional | Treatment | 93227 |
49 | As often as other peers in Clinical Cardiac Electrophysiology |
| Electrocardiogram (ecg) up to 30 days continuous with symptom monitoring, transmission and review and report by health care professional | Treatment | 93272 |
34 | As often as other peers in Clinical Cardiac Electrophysiology |
| Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days | Treatment | 93244 |
33 | As often as other peers in Clinical Cardiac Electrophysiology |
| Heart rhythm review and interpretation of continous external ekg over 8-15 days | Treatment | 93248 |
21 | Less often than most peers in Clinical Cardiac Electrophysiology |
| External shock to heart to regulate heart beat | Treatment | 92960 |
12 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
12 | Less often than most peers in Clinical Cardiac Electrophysiology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other clinical cardiac electrophysiology specialists in Iowa City 8
Same specialty, same city.
More connections — 6 related providers in 1 group
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 6
Providers in IA who bill this service to Medicare most often.
Common questions
What does Samuel L. Johnston specialize in?
Samuel L. Johnston is a clinical cardiac electrophysiology in Iowa City, IA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Samuel L. Johnston located?
Samuel L. Johnston is listed at 200 Hawkins Dr E315Gh, Iowa City, IA 52242. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Samuel L. Johnston's phone number?
The number on file is (319) 356-3689. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Samuel L. Johnston?
Samuel L. Johnston's National Provider Identifier is 1184832271. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How much experience does Samuel L. Johnston have?
Samuel L. Johnston has 19+ years experience. Registered with an NPI since 2007. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Samuel L. Johnston do most often?
According to Medicare billing data, Samuel L. Johnston provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only and electrocardiogram 2-day continuous with review by health care professional, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Samuel L. Johnston's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Samuel L. Johnston. If this is you, claiming it is free.
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