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Edit this profileAt a glance
- 29 Hospital Plaza, Suite 502, Stamford, CT 06902
About Dr. D'onofrio
Based in Stamford, CT, Gregory R. D'Onofrio, M.D. is listed in the NPI registry under cardiovascular disease. Gregory graduated from George Washington University School of Medicine in 1967. According to Medicare claims data, Gregory cared for 581 Medicare patients across 828 services. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, and routine electrocardiogram (ecg) using at least 12 leads with interpretation and report. NPI 1255304796 identifies this record in the national registry.
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
- (203) 348-7410
- Email not available
Practice Locations
29 HOSPITAL PLAZA SUITE 502
Stamford, CT 06902
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
828 services · 581 patients · 10 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
284 | As often as other peers in Cardiovascular Disease |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
55 | Less often than most peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
47 | Less often than most peers in Cardiovascular Disease |
| Ambulatory blood pressure monitoring, 1 day or longer, with review, interpretation and report | Treatment | 93790 |
21 | As often as other peers in Cardiovascular Disease |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
280 | More than most peers in Cardiovascular Disease |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
52 | More 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 |
46 | 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 |
21 | Less often than most peers in Cardiovascular Disease |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
11 | Less often than most peers in Cardiovascular Disease |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
11 | 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 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 5
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 — 26 related providers in 4 groups
Other cardiologists in Stamford 6
Same specialty, same city.
Trained at George Washington University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1967 at George Washington University School of Medicine 4
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 8
Providers in CT who bill this service to Medicare most often.
Common questions
What is Gregory R. D'Onofrio's specialty?
Gregory R. D'Onofrio is a cardiologist in Stamford, CT. 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 Gregory R. D'Onofrio?
Gregory R. D'Onofrio is listed at 29 Hospital Plaza Suite 502, Stamford, CT 06902. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gregory R. D'Onofrio?
The number on file is (203) 348-7410. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Gregory R. D'Onofrio's NPI number?
Gregory R. D'Onofrio's National Provider Identifier is 1255304796. 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 Gregory R. D'Onofrio's education?
Gregory R. D'Onofrio attended George Washington University School of Medicine, graduating in 1967. This comes from the CMS National Downloadable File.
CMS public data
How long has Gregory R. D'Onofrio been practicing?
Gregory R. D'Onofrio has 59 years experience. Calculated from a graduation year of 1967, reported in the CMS National Downloadable File.
CMS public data
What is Gregory R. D'Onofrio known for?
According to Medicare billing data, Gregory R. D'Onofrio provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only and routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gregory R. D'Onofrio confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory R. D'Onofrio. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.