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Compare the published Medicare service mix of Lizhu Gao, M.D. with clinicians in the same registry specialty: Internal Medicine.

PALOS HEIGHTS, IL · Exact areaEdit location

2024 published service data · 20 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Brian Birks, DO

Internal Medicine · Palos Heights, IL

Shared published services
3 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)
  • Hospital discharge day management, 30 minutes or less (99238)
69%Service-mix similarityView profile →

Carmen Gnatenco, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
3 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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
61%Service-mix similarityView profile →

Sophie Grace Rodrigues Pereira, MD

Internal Medicine · Palos Heights, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
59%Service-mix similarityView profile →

Samina Chaudhry, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
56%Service-mix similarityView profile →

Samantha Cecile Hathaway, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • 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 →

Abdul-Hamid Mohammed Shahbain, MD

Internal Medicine · Palos Heights, IL

Shared published services
3 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)
  • Hospital discharge day management, 30 minutes or less (99238)
49%Service-mix similarityView profile →

Lela Demeter, MD

Internal Medicine · Palos Heights, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • 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)
49%Service-mix similarityView profile →

Niranjan Champaklal Shah, MD

Internal Medicine · Palos Heights, IL

Shared published services
1 shared services · view billing descriptions
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
40%Service-mix similarityView profile →

Zulfiqar Haider Rizvi, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • 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)
36%Service-mix similarityView profile →

Mhd Firas Zakaria, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
3 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • 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)
34%Service-mix similarityView profile →

Mohamed Marwan Nahhas, MD

Internal Medicine · Palos Heights, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
29%Service-mix similarityView profile →

Noorun M Khan, M.D.

Internal Medicine · Palos Heights, IL

Shared published services
2 shared services · view billing descriptions
  • Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
20%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.