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Edit this profileWhere to find O'Neil R. Mason, M.D.
- Morristown location main office
100 Madison Ave, Morristown, NJ 07960 - Chicago location
676 N Saint Clair St, Chicago, IL 60611
About Dr. Mason
O'Neil R. Mason, M.D. practices cardiovascular disease in Morristown, NJ. O’Neil is also listed as specializing in internal medicine. According to Medicare claims data, O’Neil cared for 931 Medicare patients across 980 services. The services billed most often include ultrasound of heart with color-depicted blood flow, rate, direction and valve function, ultrasound of heart with probe in esophagus during surgery on heart or great blood vessels with report, and ultrasound of heart with color-depicted blood flow, rate, direction and valve function. The provider's National Provider Identifier (NPI) is 1699046748.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
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
- (973) 971-7416
- Email not available
Practice Locations
100 MADISON AVE
Morristown, NJ 07960
676 N Saint Clair St
Chicago, IL 60611
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
Life Support
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
- Radiofrequency ablation
Imaging
Implants
Recovery & rehabilitation
Vascular imaging
Procedures Most Often Billed to Medicare
980 services · 931 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Mri scan of heart before and after contrast | Imaging | 75561 |
12 | Less often than most peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
379 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart with probe in esophagus during surgery on heart or great blood vessels with report | Treatment | 93355 |
170 | More than most peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
146 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart, follow-up | Treatment | 93308 |
81 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart with probe in esophagus, with report | Treatment | 93312 |
60 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart blood flow, valves and chambers | Treatment | 93320 |
58 | More often than most peers in Cardiovascular Disease |
| 3d ultrasound imaging of heart for evaluation of heart structure performed during ultrasound imaging of congenital heart defects | Treatment | 93319 |
46 | More often than most peers in Cardiovascular Disease |
| Ultrasound of heart | Treatment | 93307 |
16 | Less often than most peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate and valve function | Treatment | 93325 |
12 | 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 1
Same specialty, same street address — most likely the same department or group.
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 cardiologists in Morristown 7
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2005 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Mri scan of heart before and after contrast 7
Providers in NJ who bill this service to Medicare most often.
Common questions
What is O'Neil R. Mason's specialty?
O'Neil R. Mason is a cardiologist in Morristown, NJ. That is the designation recorded for this NPI in the federal registry, where it is listed as “Cardiovascular Disease”.
NPI registry
Where can I find O'Neil R. Mason?
O'Neil R. Mason is listed at 100 Madison Ave, Morristown, NJ 07960. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact O'Neil R. Mason?
The number on file is (973) 971-7416. Contact the office directly to confirm availability and scheduling.
NPI registry
What is O'Neil R. Mason's NPI number?
O'Neil R. Mason's National Provider Identifier is 1699046748. 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
What is O'Neil R. Mason's education?
O'Neil R. Mason attended Other, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has O'Neil R. Mason been practicing?
O'Neil R. Mason has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What is O'Neil R. Mason known for?
According to Medicare billing data, O'Neil R. Mason performs imaging including mri scan of heart before and after contrast; provides treatments such as ultrasound of heart with color-depicted blood flow, rate, direction and valve function and ultrasound of heart with probe in esophagus during surgery on heart or great blood vessels with report. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has O'Neil R. Mason confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by O'Neil R. Mason. If this is you, claiming it is free.
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