Doctor profile · Federal record
Dr. Ioannis Mastoris, MD
Advanced Heart Failure and Transplant Cardiology Physician (CMS: Advanced Heart Failure and Transplant Cardiology) · Advanced Heart Failure and Transplant Cardiology Physician · Cardiovascular Disease Physician · Cardiovascular Disease Physician · Boston, MA
- NPI 1124403209
- Accepts Medicare
- 15 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
55 Fruit St, Grb 800
Boston, MA 021142696
(617) 643-7972 - Additional location
-
67 Corporate Dr Ste 200
Portsmouth, NH 038012847
(603) 610-8070 - Mailing address
-
Po Box 9142
Charlestown, MA 021299142
Credentials & registration
- NPI registered
- July 2015 — 11 yrs on file
- Profile last updated
- May 1, 2023
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207RA0001X — NUCC code
- State licenses (2)
- Massachusetts #291827 · New Hampshire #23750
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1124403209. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
779
Distinct HCPCS
9
Medicare allowed
$102,759
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 208 | 116 | $193 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 166 | 100 | $16 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 119 | 43 | $126 | |
99291 |
Critical care, first 30-74 minutes | 95 | 25 | $225 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 66 | 27 | $84 | |
G2212 |
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 49 | 35 | $34 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 33 | 33 | $184 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 23 | 23 | $240 | |
93505 |
Biopsy of heart muscle | 20 | 15 | $235 |
In context: peer comparison
Among 6 peers in this city , average services per provider: 98. This provider delivers 7.9× the peer median.Open Payments
Industry payments received
All-time total
$579
Transactions
5
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Impulse Dynamics (USA) Inc. | 3 | $311.72 | |
| Abbott Laboratories | 2 | $267.13 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
428
Patients
142
Total drug cost
$522,563
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Spironolactone | Generic | 76 | 31 | $975 |
| Metoprolol Succinate | Generic | 73 | 28 | $1,949 |
| Entresto (Sacubitril/Valsartan) | Brand | 51 | 27 | $85,347 |
| Jardiance (Empagliflozin) | Brand | 50 | 20 | $78,596 |
| Torsemide | Generic | 31 | 12 | $563 |
| Furosemide | Generic | 28 | 12 | $123 |
| Farxiga (Dapagliflozin Propanediol) | Brand | 25 | 0 | $36,788 |
| Eliquis (Apixaban) | Brand | 24 | 12 | $32,333 |
| Atorvastatin Calcium | Generic | 22 | 0 | $228 |
| Rosuvastatin Calcium | Generic | 20 | 0 | $1,208 |
Hospital affiliations
Frequently asked questions
What is Dr. Ioannis Mastoris's medical specialty?
Dr. Ioannis Mastoris practices Advanced Heart Failure and Transplant Cardiology Physician in Boston, MA.
Where does Dr. Ioannis Mastoris practice?
Dr. Ioannis Mastoris practices at 55 Fruit St, Boston, MA 021142696. Office phone: 6176437972.
What is Dr. Ioannis Mastoris's NPI?
Dr. Ioannis Mastoris's National Provider Identifier (NPI) is 1124403209, issued by NPPES.
Does Dr. Ioannis Mastoris accept Medicare assignment?
Yes. Dr. Ioannis Mastoris accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ioannis Mastoris commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (HCPCS 93000); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.