Are you Dr. Marhefka? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 925 Chestnut St, Mezzanine Floor, Philadelphia, PA 19107
About Dr. Marhefka
Gregary D. Marhefka, MD practices cardiovascular disease in Philadelphia, PA. Gregary is a 1998 graduate of Jefferson Medical College of Thomas Jefferson University. According to Medicare claims data, Gregary cared for 1,161 Medicare patients across 1,725 services. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, critical care, first 30-74 minutes, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1649226184.
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
- (215) 955-5050
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
925 CHESTNUT ST MEZZANINE FLOOR
Philadelphia, PA 19107
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
Imaging
Implants
Recovery & rehabilitation
Vascular imaging
Procedures Most Often Billed to Medicare
1,725 services · 1,161 patients · 18 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Nuclear medicine studies of heart muscle at rest and with stress and spect | Imaging | 78452 |
45 | As often as other peers in Cardiovascular Disease |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
545 | As often as other peers in Cardiovascular Disease |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
110 | Less often than most peers in Cardiovascular Disease |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | Treatment | 93018 |
45 | As often as other peers in Cardiovascular Disease |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | Treatment | 93016 |
45 | As often as other peers in Cardiovascular Disease |
| Ultrasound of heart, follow-up | Treatment | 93308 |
21 | 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 |
| Critical care, first 30-74 minutes | Office visit | 99291 |
291 | 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 |
150 | As often as other peers in Cardiovascular Disease |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
128 | As often as other 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.
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 Philadelphia 7
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Jefferson Medical College of Thomas Jefferson University 7
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Jefferson Medical College of Thomas Jefferson University 8
Providers who graduated from the same medical school in the same year.
Also performs Nuclear medicine studies of heart muscle at rest and with stress and spect 8
Providers in PA who bill this service to Medicare most often.
Common questions
What does Dr. Marhefka specialize in?
Dr. Marhefka is a cardiologist in Philadelphia, PA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Cardiovascular Disease”.
NPI registry
Where is Dr. Marhefka located?
Dr. Marhefka is listed at 925 Chestnut St Mezzanine Floor, Philadelphia, PA 19107. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Marhefka's phone number?
The number on file is (215) 955-5050. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Marhefka's NPI number?
Dr. Marhefka's National Provider Identifier is 1649226184. 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
Where did Dr. Marhefka go to medical school?
Dr. Marhefka attended Jefferson Medical College of Thomas Jefferson University, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Marhefka been practicing?
Dr. Marhefka has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Marhefka do most often?
According to Medicare billing data, Dr. Marhefka performs imaging including nuclear medicine studies of heart muscle at rest and with stress and spect; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only and ultrasound of heart with color-depicted blood flow, rate, direction and valve function, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Marhefka confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Marhefka. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.