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Compare the published Medicare service mix of Kyle Khaled Zakkar, MD with clinicians in the same registry specialty: Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS).

TUCSON, AZ · Exact areaEdit location

2024 published service data · 37 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

James Lee Knepler, M.D.

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
81%Service-mix similarityView profile →

Bhupinder Singh Natt, MD

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
70%Service-mix similarityView profile →

Christian Bime, M.D.

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
54%Service-mix similarityView profile →

Dena Kay L'heureux, MD

Critical Care (Intensivists) · Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
51%Service-mix similarityView profile →

Fadi Nabil Salim Hammoudeh, M.D.

Internal Medicine · Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
51%Service-mix similarityView profile →

Jacob Chacko, M.D.

Internal Medicine · Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
50%Service-mix similarityView profile →

Ravi Theethakarai Chandran, M.D.

Critical Care (Intensivists) · Pulmonary Disease · Sleep Medicine (CMS) · Tucson, AZ

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
46%Service-mix similarityView profile →

Ahmed Tammer Yehia El-Aini, M.D.

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
46%Service-mix similarityView profile →

Joshua Malo, M.D.

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
46%Service-mix similarityView profile →

Billie Ann Bixby, M.D.

Critical Care (Intensivists) · Internal Medicine (CMS) · Tucson, AZ

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
45%Service-mix similarityView profile →

Thomas Rotkis, M.D.

Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
2 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
42%Service-mix similarityView profile →

Ubair Ahmed, M.D.

Critical Care (Intensivists) · Internal Medicine · Pulmonary Disease (CMS) · Tucson, AZ

Shared published services
3 shared services · view billing descriptions
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
  • Critical care, first 30-74 minutes (99291)
41%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.