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SUN, JULIEM.D. NPI 1629036819 Clinician

Diagnostic Radiology · DOWNEY, CA

Specialty Diagnostic Radiology — from billed Medicare claims
Trained NORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL — medical school, self-reported to CMS
In practice about 36 years since medical school (class of 1990, self-reported to CMS)
Location DOWNEY, CA · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 64 codes billed · 10,274 disclosed services (CY2024 — most recent year in data)
Current groups
member of 4 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20192026
DAVID C P CHEN, M.D., INC
2026
DESERT ADVANCED IMAGING MEDICAL CENTER
2026
BEVERLY RADIOLOGY MEDICAL GROUP III
2024–2026
DOWNEY RADIOLOGY ASSOCIATES
2024–2026
GOLDEN STATE IMAGING ASSOCIATES INC
2024–2025
RENAISSANCE IMAGING MEDICAL ASSOCIATES INC
2020–2025
LOS ALAMITOS RADIOLOGY GROUP, INC.
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 2025-11

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. Included with Platform.

  • 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
77067 Screening mammography
77063 Screening 3d breast mammography
71046 X-ray of chest, 2 views
77080 Dxa bone density measurement of hip, pelvis, spine
76700 Complete ultrasound scan of abdomen
70450 Ct scan head or brain without contrast
76641 Complete ultrasound scan of 1 breast
G0279 Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066)
73562 X-ray of knee, 3 views
77066 Diagnostic mammography of both breasts
71045 X-ray of chest, 1 view
76642 Limited ultrasound scan of 1 breast
77065 Diagnostic mammography of 1 breast
71250 Ct scan of chest without contrast
72110 X-ray of lower and sacral spine, minimum of 4 views
72100 X-ray of lower and sacral spine, 2-3 views
76770 Complete ultrasound scan behind abdominal cavity
76536 Ultrasound scan of head and neck soft tissue
73630 X-ray of foot, minimum of 3 views
72125 Ct scan of upper spine without contrast
71271 Low dose ct scan of chest for lung cancer screening
73030 X-ray of shoulder, minimum of 2 views
70498 Ct scan of blood vessels of neck with contrast
74176 Ct scan of abdomen and pelvis without contrast
70496 Ct scan of blood vessels of head with contrast
93970 Ultrasound study of arm or leg veins with compression and maneuvers
93880 Ultrasound of both sides of head and neck blood flow
72148 Mri scan of lower spinal canal without contrast
76856 Complete ultrasound scan of pelvis
70551 Mri scan of brain without contrast
72050 X-ray of upper spine, 4-5 views
73502 X-ray of hip, 2-3 views
19083 Biopsy of breast and placement of locating device using ultrasound, first growth
72040 X-ray of upper spine, 2-3 views
73610 X-ray of ankle, minimum of 3 views
73130 X-ray of hand, minimum of 3 views
72202 X-ray of joint between lower spine and hip bone, 3 or more views
74178 Ct scan of abdomen and pelvis before and after contrast
72131 Ct scan of lower spine without contrast
71110 X-ray of ribs on both sides of body, 3 views
74018 X-ray of abdomen, 1 view
72072 X-ray of middle spine, 3 views
72141 Mri scan of upper spinal canal without contrast
74177 Ct scan of abdomen and pelvis with contrast
71270 Ct scan of chest before and after contrast
71260 Ct scan of chest with contrast
93925 Ultrasound of leg arteries or artery grafts
74150 Ct scan of abdomen without contrast
71275 Ct scan of blood vessels of chest with contrast
73110 X-ray of wrist, minimum of 3 views
73721 Mri scan of leg joint without contrast
74170 Ct scan of abdomen before and after contrast
70553 Mri scan of brain before and after contrast
76830 Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina
76705 Limited ultrasound scan of abdomen
70486 Ct scan of face without contrast
73718 Mri scan of leg without contrast
76882 Limited ultrasound scan of joint or other extremity structure except blood vessels
71101 X-ray of ribs on side of body, minimum of 3 views
72128 Ct scan of middle spine without contrast
73552 X-ray of thigh bone, minimum 2 views
70360 X-ray of soft tissue of neck
76872 Ultrasound scan of pelvic region through rectum
93971 Ultrasound study of one arm or leg veins with compression and maneuvers

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.