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Compare the published Medicare service mix of Vivian Christine Roy, M.D. with clinicians in the same registry specialty: Physical Medicine And Rehabilitation (CMS).

CHICAGO, IL · Exact areaEdit location

2024 published service data · 84 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Christopher Reger, MD

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscle (95874)
  • Injection of chemical for paralysis of nerve muscles on arm or leg, 5 or more muscles, first extremity (64644)
84%Service-mix similarityView profile →

Steven Patrick Kreis, DO

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscle (95874)
  • Injection of chemical for paralysis of nerve muscles on arm or leg, 5 or more muscles, first extremity (64644)
  • Injection of chemical for paralysis of nerve muscles on arm or leg, 1-4 muscles, each additional extremity (64643)
68%Service-mix similarityView profile →

Daniel Robert Bunzol, M.D.

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Needle measurement of electrical activity in muscle with injection of chemical for paralysis of nerve muscle (95874)
  • Injection of chemical for paralysis of nerve muscles on arm or leg, 5 or more muscles, first extremity (64644)
58%Service-mix similarityView profile →

Leslie K Rydberg, MD

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
55%Service-mix similarityView profile →

Matthew Clifford Oswald, M.D.

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
54%Service-mix similarityView profile →

Mark Huang, MD

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
52%Service-mix similarityView profile →

Rachna Hajela Soriano, DO

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
47%Service-mix similarityView profile →

Van Do, MD

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
47%Service-mix similarityView profile →

Aaron Gilbert, MD

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Hospital discharge day management, 30 minutes or less (99238)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
47%Service-mix similarityView profile →

Benjamin Jay Friedman, M.D.

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
46%Service-mix similarityView profile →

Michelle S Gittler

Orthopedic Surgery · Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
46%Service-mix similarityView profile →

Jacqueline Diane Neal, M.D.

Physical Medicine And Rehabilitation (CMS) · Chicago, IL

Shared published services
1 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)
46%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.