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Compare the published Medicare service mix of Leslie B Littlefield, MD with clinicians in the same registry specialty: Critical Care (Intensivists) · Pulmonary Disease (CMS).

SACRAMENTO, CA · Exact areaEdit location

2024 published service data · 35 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Nathaniel Gordon, MD

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

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Emergent insertion of breathing tube into windpipe using an endoscope (31500)
77%Service-mix similarityView profile →

Darshan Rameshchandra Dhingani

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

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Critical care, each additional 30 minutes (99292)
74%Service-mix similarityView profile →

Jeffrey Aaron Kenny, MD

Critical Care (Intensivists) (CMS) · Sacramento, CA

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
67%Service-mix similarityView profile →

Loredo Manuel Lawsin, MD

Critical Care (Intensivists) · Internal Medicine · Nephrology (CMS) · Sacramento, CA

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
67%Service-mix similarityView profile →

Bradley Wayne Schroeder, MD, PHD

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

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Critical care, each additional 30 minutes (99292)
  • Emergent insertion of breathing tube into windpipe using an endoscope (31500)
66%Service-mix similarityView profile →

Erik Campbell, MD

Emergency Medicine (CMS) · Sacramento, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Critical care, each additional 30 minutes (99292)
55%Service-mix similarityView profile →

Kapil Dhawan, M.D.

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

Shared published services
3 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
  • Critical care, each additional 30 minutes (99292)
55%Service-mix similarityView profile →

Petey Laohaburanakit, M.D.

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

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
53%Service-mix similarityView profile →

Richard David Defelice, M.D.

Critical Care (Intensivists) · Infectious Disease · Pulmonary Disease (CMS) · Sacramento, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)
52%Service-mix similarityView profile →

Yuen W. Kwan, MD

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

Shared published services
1 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
48%Service-mix similarityView profile →

Sean M Gunther Maher, MD

Critical Care (Intensivists) (CMS) · Sacramento, CA

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Critical care, each additional 30 minutes (99292)
47%Service-mix similarityView profile →

Mandeep Kaur Grewal, M.D.

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

Shared published services
2 shared services · view billing descriptions
  • Critical care, first 30-74 minutes (99291)
  • Critical care, each additional 30 minutes (99292)
45%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.