Physician Profile
William W. Oneill, MD
Unclaimed ProfileAbout Dr. Oneill
William W. Oneill, MD is a healthcare provider in Naples, FL specializing in cardiovascular disease. William is also listed as specializing in interventional cardiology. Medicare claims data shows William provided 42 services to 42 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (239) 624-4299
- Email not available
Practice Locations
399 9TH ST N STE 300
Naples, FL 34102
Conditions Commonly Evaluated or Treated
Within Cardiovascular Disease 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
Most searched conditions
- AFib
- Congestive heart failure
- Heart attack
- Heart disease
- High blood pressure
- High cholesterol
Coronary and ischemic heart disease
- Coronary artery disease
- Stable angina
Heart failure and cardiomyopathy
- Hypertrophic cardiomyopathy
- Myocarditis
- Pericardial effusion
Heart rhythm
Symptoms and functional disorders
- Fainting and syncope
- Heart palpitations
- Postural orthostatic tachycardia syndrome
Valve and structural heart
- Aortic stenosis
- Mitral regurgitation
- Mitral valve prolapse
- Patent foramen ovale
Vascular and risk factors
- Aortic aneurysm
- Carotid artery disease
- Familial hypercholesterolemia
- Resistant hypertension
Artery & vascular
- Peripheral Artery Disease (PAD)
Heart inflammation
- Pericarditis (Heart Sac Inflammation)
Heart muscle
Heart valves
- Heart Murmur
Vascular disease
- High Blood Pressure in the Lungs (Pulmonary Hypertension)
Procedures & services
Most searched procedures
- Echocardiogram
- EKG
- Heart monitor
- Heart stent
- Pacemaker surgery
- Stress test
Office and noninvasive testing
- Ambulatory blood-pressure monitoring
Advanced imaging
- Cardiac magnetic resonance imaging
- Nuclear cardiac stress imaging
Consultations
- Preventive Cardiology Consultation
Diagnostic testing
- Cardiopulmonary Exercise Testing (CPET)
- Tilt Table Test
Diagnostics
- Electrophysiology Study (EP Study)
Heart devices
- Biventricular Pacemaker (Cardiac Resynchronization Therapy)
- Implantable Loop Recorder (Cardiac Monitor Implant)
Heart imaging
- Heart CT Scan (Cardiac CT)
Heart procedures
- Heart Fluid Drainage (Pericardiocentesis)
Heart rhythm procedures
- Radiofrequency ablation
Imaging
- Heart Calcium Scan
- Transesophageal Echocardiogram for Kids
Implants
- Defibrillator Implant (ICD)
Recovery & rehabilitation
- Cardiac Rehabilitation Program
Vascular imaging
- Carotid Ultrasound
- Leg Circulation Test (ABI and Arterial Doppler)
Procedures Most Often Billed to Medicare
42 services · 42 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
13 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
16 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
13 |
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.
Other cardiologists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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.
More connections — 12 related providers in 2 groups
Other cardiologists in Naples 4
Same specialty, same city.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 8
Providers in FL who bill this service to Medicare most often.
Common questions
What does Dr. Oneill specialize in?
Dr. Oneill is a cardiologist in Naples, FL. That is the designation recorded for this NPI in the federal registry, where it is listed as “Cardiovascular Disease”.
NPI registry
Where is Dr. Oneill located?
Dr. Oneill is listed at 399 9Th St N Ste 300, Naples, FL 34102. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Oneill's phone number?
The number on file is (239) 624-4299. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Oneill?
Dr. Oneill's National Provider Identifier is 1881676435. 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 Dr. Oneill have?
Dr. Oneill has 21+ years experience. Registered with an NPI since 2005. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Dr. Oneill do most often?
According to Medicare billing data, Dr. Oneill provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Oneill's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Oneill. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.