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KATZ, MARSHALLM.D. NPI 1124024013 Clinician

Cardiology · BOSTON, MA

Specialty Cardiology — from billed Medicare claims
Trained BOSTON UNIVERSITY SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 35 years since medical school (class of 1991, self-reported to CMS)
Location BOSTON, MA · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 44 codes billed · 8,086 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
ATRIUS HEALTH INC
2019–2026

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2011-09

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Unlock to see the figure.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
36415 Insertion of needle into vein for collection of blood sample
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
82565 Blood creatinine level
80051 Blood test panel for electrolytes (sodium potassium, chloride, carbon dioxide)
93294 Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days
93296 Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days
83880 Natriuretic peptide (heart and blood vessel protein) level
80061 Blood test, lipids (cholesterol and triglycerides)
93306 Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
G2211 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's
93298 Evaluation of cardiac rhythm monitor system, remote up to 30 days
84460 Liver enzyme (sgpt), level
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
93248 Heart rhythm review and interpretation of continous external ekg over 8-15 days
J2785 Injection, regadenoson, 0.1 mg
A9500 Technetium tc-99m sestamibi, diagnostic, per study dose
85014 Red blood cell concentration measurement
85018 Blood count, hemoglobin
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
93280 Programming of dual lead pacemaker system
93320 Ultrasound of heart blood flow, valves and chambers
93325 Ultrasound of heart with color-depicted blood flow, rate and valve function
93351 Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report
78452 Nuclear medicine studies of heart muscle at rest and with stress and spect
84520 Urea nitrogen level to assess kidney function, quantitative
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
84443 Blood test, thyroid stimulating hormone (tsh)
93015 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
86140 Measurement c-reactive protein for detection of infection or inflammation
93356 Heart muscle strain imaging
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
84450 Liver enzyme (sgot), level
80048 Blood test, basic group of blood chemicals (calcium, total)
83735 Magnesium level
85379 Coagulation function measurement, d-dimer; quantitative
85610 Blood test, clotting time
82570 Creatinine level to test for kidney function or muscle injury
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
83540 Iron level
84466 Transferrin (iron binding protein) level
93279 Programming of single lead pacemaker system

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.