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Compare the published Medicare service mix of Timmy Cheng, M.D. with clinicians in the same registry specialty: Pulmonary Disease (CMS).

ORANGE, CA · Exact areaEdit location

2024 published service data · 18 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Lillian Chow, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
90%Service-mix similarityView profile →

Richard Anthony Lee, MD

Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
88%Service-mix similarityView profile →

Dinora Beatriz Chinchilla, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
79%Service-mix similarityView profile →

Huawei Dong, M.D.

Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
78%Service-mix similarityView profile →

Bassam Yaghmour, M.D.

Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
72%Service-mix similarityView profile →

Hugo L Paz Y Mar, M.D.

Critical Care (Intensivists) · Pulmonary Disease · Sleep Medicine (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
72%Service-mix similarityView profile →

Martin Rofael

Internal Medicine (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
66%Service-mix similarityView profile →

Mark E Wylam, M.D.

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Test to examine how well the lungs exchange gases (94729)
61%Service-mix similarityView profile →

Adithya Cattamanchi, MD

Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
3 shared services · view billing descriptions
  • Test to examine how well the lungs exchange gases (94729)
  • Test to measure expiratory airflow and volume changes before and after medication administration (94060)
  • Test to determine lung volumes using sensors (94726)
50%Service-mix similarityView profile →

Peter Roy Smethurst, MD

Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
46%Service-mix similarityView profile →

James Henry Roum, MD

Internal Medicine · Pulmonary Disease (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
43%Service-mix similarityView profile →

Desmond Adrian Sjauwfoekloy, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Orange, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
43%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.