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Compare the published Medicare service mix of Nicolas Chafic Issa, MD with clinicians in the same registry specialty: Infectious Disease (CMS).

BOSTON, MA · Exact areaEdit location

2024 published service data · 146 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Lisa A Cosimi, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
89%Service-mix similarityView profile →

Sara Winn Dong, MD

Infectious Disease · Internal Medicine · Pediatric Medicine (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
89%Service-mix similarityView profile →

Jennifer A Johnson, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
88%Service-mix similarityView profile →

Conor Mccolgan Stack, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
83%Service-mix similarityView profile →

Barbra Mcdonagh Blair, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
81%Service-mix similarityView profile →

Alyssa Rose Letourneau, MD

Infectious Disease · Internal Medicine (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
81%Service-mix similarityView profile →

Christopher F Rowley, M.D.

Infectious Disease · Internal Medicine (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
80%Service-mix similarityView profile →

Jeffrey Larnard, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
78%Service-mix similarityView profile →

Nikolaos Mavrogiorgos, M.D.

Infectious Disease (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
77%Service-mix similarityView profile →

Jai Govind Marathe, M.D.

Infectious Disease · Internal Medicine (CMS) · Boston, MA

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)
  • Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)
  • Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)
77%Service-mix similarityView profile →

Athe Michaelnoel Tsibris, MD

Infectious Disease · Internal Medicine (CMS) · Boston, MA

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)
77%Service-mix similarityView profile →

Deborah Stephanie Yokoe, MD

Infectious Disease · Internal Medicine (CMS) · Boston, MA

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)
77%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.