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Edit this profileWhere to find Guilherme Marmontel Nasi, M.D.
- Dover location main office
19 Old Rollinsford Rd Bldg B, Dover, NH 03820 - Boston location
55 Fruit St, Boston, MA 02114
About Dr. Marmontel Nasi
Guilherme Marmontel Nasi, M.D. is a healthcare provider in Dover, NH specializing in cardiovascular disease (cardiology). Guilherme is also listed as specializing in internal medicine and cardiovascular disease. Medicare claims data shows Guilherme provided 1,260 services to 954 patients. The services billed most often include routine electrocardiogram (ecg) using at least 12 leads with interpretation and report, routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes. This provider record is associated with NPI 1639526825.
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
- (603) 516-4265
- Email not available
Practice Locations
19 OLD ROLLINSFORD RD BLDG B
Dover, NH 03820
55 Fruit St
Boston, MA 02114
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
- Slow heart rate (bradycardia)
- Supraventricular tachycardia
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
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
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
1,260 services · 954 patients · 19 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
240 | More than most peers in Cardiovascular Disease… |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
149 | More often than most peers in Cardiovascular Disease… |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
128 | More often than most peers in Cardiovascular Disease… |
| Ultrasound of heart, follow-up | Treatment | 93308 |
23 | As often as other peers in Cardiovascular Disease… |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician | Treatment | 93018 |
14 | Less often than most peers in Cardiovascular Disease… |
| Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician | Treatment | 93016 |
14 | Less often than most peers in Cardiovascular Disease… |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
14 | More often than most peers in Cardiovascular Disease… |
| Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | Treatment | 93306 |
12 | More often than most peers in Cardiovascular Disease… |
| Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days | Treatment | 93244 |
12 | Less often than most peers in Cardiovascular Disease… |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
146 | 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 cardiovascular diseases at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
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 — 22 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 8
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 6
Providers in NH who bill this service to Medicare most often.
Common questions
What kind of doctor is Guilherme Marmontel Nasi?
Guilherme Marmontel Nasi is a cardiovascular disease (cardiology) in Dover, NH. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Guilherme Marmontel Nasi's address?
Guilherme Marmontel Nasi is listed at 19 Old Rollinsford Rd Bldg B, Dover, NH 03820. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Guilherme Marmontel Nasi?
The number on file is (603) 516-4265. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Guilherme Marmontel Nasi?
Guilherme Marmontel Nasi's National Provider Identifier is 1639526825. 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 Guilherme Marmontel Nasi train?
Guilherme Marmontel Nasi attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Guilherme Marmontel Nasi have?
Guilherme Marmontel Nasi has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Guilherme Marmontel Nasi perform?
According to Medicare billing data, Guilherme Marmontel Nasi provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and 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 Guilherme Marmontel Nasi's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Guilherme Marmontel Nasi. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.