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KNOX, MICHAELMD NPI 1386663920 Clinician

Interventional Radiology · GRAND RAPIDS, MI

Specialty Interventional Radiology — from billed Medicare claims
Trained UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS — medical school, self-reported to CMS
In practice about 47 years since medical school (class of 1979, self-reported to CMS)
Location GRAND RAPIDS, MI · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 33 codes billed · 1,754 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
ADVANCED RADIOLOGY SERVICES PC
2019–2026
SPARTAN RADIOLOGY INC
2023–2024

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 2009-08

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
71045 X-ray of chest, 1 view
71046 X-ray of chest, 2 views
74018 X-ray of abdomen, 1 view
99152 Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes
73502 X-ray of hip, 2-3 views
72100 X-ray of lower and sacral spine, 2-3 views
73030 X-ray of shoulder, minimum of 2 views
76937 Ultrasonic guidance for blood vessel access
77001 Fluoroscopic guidance for insertion or removal of central vein access device
77012 Review by radiologist of ct guidance for needle placement
49424 Injection of contrast through abdominal cavity tube for x-ray study
76080 Review by radiologist of abscess or sinus cavity study
72040 X-ray of upper spine, 2-3 views
73562 X-ray of knee, 3 views
76380 Limited or follow-up ct scan
76942 Ultrasonic guidance for needle placement
32555 Aspiration of fluid from chest cavity using imaging guidance
10005 Fine needle aspiration biopsy using ultrasound guidance, first growth
36561 Insertion of central venous tube with port (5 years or older)
49406 Drainage of fluid collection of abdominal cavity by tube using imaging guidance
73560 X-ray of knee, 1-2 views
49450 Replacement of stomach or large bowel tube using fluoroscopic guidance with contrast
72110 X-ray of lower and sacral spine, minimum of 4 views
73564 X-ray of knee, 4 or more views
36558 Insertion of tunneled central venous tube for infusion (5 years or older)
73610 X-ray of ankle, minimum of 3 views
32557 Drainage of fluid from chest cavity with insertion of indwelling tube using imaging guidance
49452 Replacement of stomach-to-small bowel tube using fluoroscopic guidance with contrast
72072 X-ray of middle spine, 3 views
36556 Insertion of non-tunneled central venous tube for infusion (5 years or older)
37242 Occlusion of artery with review by radiologist
73552 X-ray of thigh bone, minimum 2 views
74019 X-ray of abdomen, 2 views

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.