Marshall Katz, M.D.
NPI 1124024013 · Cardiovascular Disease Physician · Boston, MA
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marshall Katz, M.D. is a Cardiovascular Disease Physician provider in Boston, MA (NPI 1124024013).
Provider details
- NPI number
- 1124024013
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 035987 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
7,966 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 829 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 813 | $139 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 776 | $16 |
| Blood Creatinine Level82565 | 580 | $5 |
| Blood Test Panel for Electrolytes (sodium Potassium, Chloride, Carbon Dioxide)80051 | 567 | $7 |
| Evaluation of Single, Dual, Multiple Lead Or Leadless Pacemaker System, Remote Up to 90 Days93294 | 528 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 60 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 945 | 288 |
| Metoprolol Succinate | 855 | 260 |
| Apixabanbrand: Eliquis | 827 | 188 |
| Amlodipine Besylate | 439 | 134 |
| Furosemide | 429 | 126 |
| Rosuvastatin Calcium | 363 | 112 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-24
- Last updated
- 2011-09-23
Frequently asked questions
- What is Marshall Katz's NPI number?
- Marshall Katz's National Provider Identifier (NPI) is 1124024013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marshall Katz's specialty?
- Marshall Katz is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Marshall Katz located?
- Marshall Katz's practice location on file with NPPES is 133 Brookline Ave, Boston, MA 02215-3904.
- What is Marshall Katz's phone number?
- The practice phone number listed in the NPPES registry for Marshall Katz is (617) 421-6050.
- Does Marshall Katz accept Medicare?
- Marshall Katz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marshall Katz's NPI active?
- Yes — Marshall Katz's NPI (1124024013) is active in the NPPES registry as of the last update on 2011-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.