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CHAN, RONALDM.D. NPI 1154367993 Clinician

Diagnostic Radiology · WALNUT CREEK, CA

Specialty Diagnostic Radiology — from billed Medicare claims
Trained NEW YORK UNIVERSITY SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 28 years since medical school (class of 1998, self-reported to CMS)
Location WALNUT CREEK, CA · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 60 codes billed · 8,003 disclosed services (CY2024 — most recent year in data)
Current groups
member of 3 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20192026
BAY IMAGING CONSULTANTS MEDICAL GROUP INC
2019–2026
JOHN MUIR MAGNETIC IMAGING CENTER
2019–2026
JOHN MUIR TRAUMA PHYSICIANS BILLING SERVICE
2019–2026
NEUROSCAN
2019

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 2015-04

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
A9585 Injection, gadobutrol, 0.1 ml
71045 X-ray of chest, 1 view
73721 Mri scan of leg joint without contrast
73221 Mri scan of arm joint without contrast
71046 X-ray of chest, 2 views
74177 Ct scan of abdomen and pelvis with contrast
71250 Ct scan of chest without contrast
70450 Ct scan head or brain without contrast
74018 X-ray of abdomen, 1 view
72148 Mri scan of lower spinal canal without contrast
74176 Ct scan of abdomen and pelvis without contrast
76770 Complete ultrasound scan behind abdominal cavity
73564 X-ray of knee, 4 or more views
73630 X-ray of foot, minimum of 3 views
76705 Limited ultrasound scan of abdomen
73502 X-ray of hip, 2-3 views
73030 X-ray of shoulder, minimum of 2 views
73718 Mri scan of leg without contrast
76536 Ultrasound scan of head and neck soft tissue
71260 Ct scan of chest with contrast
77077 X-ray of joints, multiple
76700 Complete ultrasound scan of abdomen
71275 Ct scan of blood vessels of chest with contrast
74183 Mri scan of abdomen before and after contrast
72125 Ct scan of upper spine without contrast
72197 Mri scan of pelvis before and after contrast
72110 X-ray of lower and sacral spine, minimum of 4 views
93971 Ultrasound study of one arm or leg veins with compression and maneuvers
72141 Mri scan of upper spinal canal without contrast
73130 X-ray of hand, minimum of 3 views
72100 X-ray of lower and sacral spine, 2-3 views
73700 Ct scan of leg without contrast
73560 X-ray of knee, 1-2 views
74178 Ct scan of abdomen and pelvis before and after contrast
72131 Ct scan of lower spine without contrast
72195 Mri scan of pelvis without contrast
72050 X-ray of upper spine, 4-5 views
73110 X-ray of wrist, minimum of 3 views
76377 3d radiographic procedure with computerized image postprocessing
72170 X-ray of pelvis, 1-2 views
73620 X-ray of foot, 2 views
73140 X-ray of finger, minimum of 2 views
93970 Ultrasound study of arm or leg veins with compression and maneuvers
74019 X-ray of abdomen, 2 views
74230 Imaging for evaluation of swallowing function
71101 X-ray of ribs on side of body, minimum of 3 views
72192 Ct scan of pelvis without contrast
73218 Mri scan of arm without contrast
73590 X-ray of lower leg, 2 views
70498 Ct scan of blood vessels of neck with contrast
70496 Ct scan of blood vessels of head with contrast
73200 Ct scan of arm without contrast
73610 X-ray of ankle, minimum of 3 views
72070 X-ray of middle spine, 2 views
73523 X-ray of both hips, minimum of 5 views
72040 X-ray of upper spine, 2-3 views
73060 X-ray of upper arm, minimum of 2 views
76706 Ultrasound scan of abdominal aorta
71100 X-ray of ribs on side of body, 2 views
73552 X-ray of thigh bone, minimum 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.