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Similar work.
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Compare the published Medicare service mix of Richard Y Chai, MD with clinicians in the same registry specialty: Diagnostic Radiology (CMS).

LONG BEACH, CA · Exact areaEdit location

2024 published service data · 45 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Robert O Lindsey, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Mri scan of leg joint without contrast (73721)
  • Mri scan of upper spinal canal without contrast (72141)
63%Service-mix similarityView profile →

Charlton Byun, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • X-ray of chest, 2 views (71046)
  • Mri scan of upper spinal canal without contrast (72141)
62%Service-mix similarityView profile →

Charles Franklin Brown, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Mri scan of leg joint without contrast (73721)
54%Service-mix similarityView profile →

Justin L Mccoy, MD

Diagnostic Radiology · Interventional Radiology · Otolaryngology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • Mri scan of leg joint without contrast (73721)
48%Service-mix similarityView profile →

Natalia Zarzhevsky, MD, PHD

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Mri scan of leg joint without contrast (73721)
  • X-ray of chest, 2 views (71046)
44%Service-mix similarityView profile →

Sireesha Iruvuri, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • X-ray of chest, 2 views (71046)
44%Service-mix similarityView profile →

Dong H Kim, MD

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • X-ray of chest, 2 views (71046)
  • Mri scan of upper spinal canal without contrast (72141)
43%Service-mix similarityView profile →

Ammar Istwani, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Mri scan of leg joint without contrast (73721)
  • X-ray of chest, 2 views (71046)
42%Service-mix similarityView profile →

Daniel Leon Gianella, MD

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Dxa bone density measurement of hip, pelvis, spine (77080)
  • X-ray of chest, 2 views (71046)
42%Service-mix similarityView profile →

Macarthur Drake, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • X-ray of chest, 2 views (71046)
  • X-ray of shoulder, minimum of 2 views (73030)
  • X-ray of knee, 3 views (73562)
41%Service-mix similarityView profile →

Arnold Rappoport, M.D.

Diagnostic Radiology (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • X-ray of chest, 2 views (71046)
  • Mri scan of middle spinal canal without contrast (72146)
40%Service-mix similarityView profile →

Keith R Burnett, M.D.

Diagnostic Radiology · Nuclear Medicine (CMS) · Long Beach, CA

Shared published services
3 shared services · view billing descriptions
  • Mri scan of lower spinal canal without contrast (72148)
  • Mri scan of leg joint without contrast (73721)
  • Mri scan of arm joint without contrast (73221)
39%Service-mix similarityView profile →
How this comparison works

We use the same calendar year of CMS Medicare Physician & Other Practitioners data for both providers. Published non-drug service counts are combined by HCPCS code across places of service. We apply log(1 + count), normalize the vectors, and compare them using cosine similarity.

Candidates share the reference provider’s current NPPES primary taxonomy and match the location you enter. We examine up to 500 candidates in NPI order, then show up to 12 with the highest positive similarity within that set. The score is not a percentile, medical recommendation, or prediction. Suppressed services are not estimated. Medicare fee-for-service data does not describe a provider’s entire practice.

Source: CMS Medicare Physician & Other Practitioners - by Provider and Service : 2024-12-01 · Published May 21, 2026.