Are you Dr. Oneill? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileWhere to find William W. Oneill, MD
- Naples location main office
399 9Th St N Ste 300, Naples, FL 34102 - Detroit location
2799 W Grand Blvd, K14 Office B1417, Detroit, MI 48202
About 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. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only. This provider record is associated with NPI 1881676435.
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
- (239) 624-4299
- Email not available
Practice Locations
399 9TH ST N STE 300
Naples, FL 34102
2799 W Grand Blvd K14 Office B1417
Detroit, MI 48202
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
Specialized cardiovascular care
Most searched conditions
Coronary and ischemic heart disease
Heart failure and cardiomyopathy
Heart rhythm
Symptoms and functional disorders
Valve and structural heart
Vascular and risk factors
Artery & vascular
Heart inflammation
Heart muscle
Heart valves
Vascular disease
Procedures & services
Advanced imaging
- Cardiac computed tomography
- Coronary artery calcium scan
- Transesophageal echocardiogram
- Cardiac magnetic resonance imaging
- Nuclear cardiac stress imaging
Catheter-based diagnosis and treatment
Heart & circulation
Office and noninvasive testing
- Cardiology consultation
- Exercise stress test
- Pharmacologic cardiac stress test
- Stress echocardiogram
- Transthoracic echocardiogram
- Ambulatory blood-pressure monitoring
Structural heart
Most searched procedures
Consultations
Diagnostic testing
Diagnostics
Heart devices
- Biventricular Pacemaker (Cardiac Resynchronization Therapy)
- Implantable Loop Recorder (Cardiac Monitor Implant)
Heart imaging
Heart procedures
Heart rhythm procedures
Imaging
Implants
Recovery & rehabilitation
Vascular imaging
Procedures Most Often Billed to Medicare
42 services · 42 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
13 | Less often than most peers in Cardiovascular Disease |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
16 | Less often than most peers in Cardiovascular Disease |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
13 | Less often than most peers in Cardiovascular Disease |
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 8
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 — 13 related providers in 2 groups
Other cardiologists in Naples 5
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. Contact the office directly to confirm availability and scheduling.
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
Guide.md listings do not constitute medical advice or an endorsement.