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MARBACH, WALTERMD NPI 1891703591 Clinician

Rheumatology · CRESTWOOD, IL

Specialty Rheumatology — from billed Medicare claims
Trained UNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB) — medical school, self-reported to CMS
In practice about 49 years since medical school (class of 1977, self-reported to CMS)
Location CRESTWOOD, IL · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 29 codes billed · 291,181 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
METRO INFECTIOUS DISEASE CONSULTANTS LLC
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 2015-05

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
J0878 Injection, daptomycin, 1 mg
J3380 Injection, vedolizumab, intravenous, 1 mg
J0485 Injection, belatacept, 1 mg
J0875 Injection, dalbavancin, 5 mg
J2356 Injection, tezepelumab-ekko, 1 mg
J2357 Injection, omalizumab, 5 mg
J1306 Injection, inclisiran, 1 mg
J1745 Injection, infliximab, excludes biosimilar, 10 mg
J1569 Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg
J2182 Injection, mepolizumab, 1 mg
J0696 Injection, ceftriaxone sodium, per 250 mg
J0897 Injection, denosumab, 1 mg
J2919 Injection, methylprednisolone sodium succinate, 5 mg
96365 Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less
J0517 Injection, benralizumab, 1 mg
J1335 Injection, ertapenem sodium, 500 mg
96413 Administration of chemotherapy into vein, 1 hour or less
96401 Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle
96367 Infusion into a vein for therapy, prevention, or diagnosis, additional sequential infusion, 1 hour or less
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
96372 Injection of drug or substance under skin or into muscle
36415 Insertion of needle into vein for collection of blood sample
96366 Infusion into a vein for therapy, prevention, or diagnosis, each additional hour
96415 Administration of chemotherapy into vein, each additional hour
96375 Injection of additional new drug or substance into vein
96374 Injection of drug or substance into vein
J1200 Injection, diphenhydramine hcl, up to 50 mg
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more

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.