Geoffrey Hirsowitz, MD
NPI 1649299744 · Cardiovascular Disease Physician · Boston, MA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Geoffrey Hirsowitz, MD is a Cardiovascular Disease Physician provider in Boston, MA (NPI 1649299744).
Provider details
- NPI number
- 1649299744
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 79629 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
654 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 159 | $215 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 71 | $140 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 70 | $9 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 61 | $16 |
| Natriuretic Peptide (heart and Blood Vessel Protein) Level83880 | 46 | $38 |
| Blood Test Panel for Electrolytes (sodium Potassium, Chloride, Carbon Dioxide) |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 156 | 59 |
| Apixabanbrand: Eliquis | 107 | 23 |
| Atorvastatin Calcium | 106 | 48 |
| Furosemide | 51 | 28 |
| Losartan Potassium | 30 | — |
| Spironolactone | 27 | 11 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2021-02-17
- Certified
- 2021-02-17
Frequently asked questions
- What is Geoffrey Hirsowitz's NPI number?
- Geoffrey Hirsowitz's National Provider Identifier (NPI) is 1649299744, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Geoffrey Hirsowitz's specialty?
- Geoffrey Hirsowitz is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Geoffrey Hirsowitz located?
- Geoffrey Hirsowitz's practice location on file with NPPES is 133 Brookline Ave, Boston, MA 02215-3904.
- What is Geoffrey Hirsowitz's phone number?
- The practice phone number listed in the NPPES registry for Geoffrey Hirsowitz is (617) 421-6050.
- Does Geoffrey Hirsowitz accept Medicare?
- Geoffrey Hirsowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Geoffrey Hirsowitz's NPI active?
- Yes — Geoffrey Hirsowitz's NPI (1649299744) is active in the NPPES registry as of the last update on 2021-02-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.