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

WEST HAVEN, CT · Exact areaEdit location

2024 published service data · 19 eligible profiles compared. Similarity describes billing patterns, not quality, outcomes, or suitability for your care.

Chioma U Nwokolo Nwangwu, MD

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
74%Service-mix similarityView profile →

Garth Oliver, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
73%Service-mix similarityView profile →

Vikram Rao, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
68%Service-mix similarityView profile →

Collin C Watson, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
66%Service-mix similarityView profile →

Edward Prior, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
62%Service-mix similarityView profile →

Channa Perera, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Advance care planning, first 30 minutes (99497)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
60%Service-mix similarityView profile →

Benedict Fernando, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
53%Service-mix similarityView profile →

Piyush Gupta, M.D.

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Advance care planning, first 30 minutes (99497)
  • Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)
44%Service-mix similarityView profile →

Horatiu C. Balas, M.D.

Internal Medicine · West Haven, CT

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)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
39%Service-mix similarityView profile →

Sarah Marone Trainor, MD

Internal Medicine · West Haven, CT

Shared published services
3 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)
  • Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)
  • Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)
34%Service-mix similarityView profile →

Jadwiga Maja Stepczynski, M.D.

Internal Medicine · West Haven, CT

Shared published services
1 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)
30%Service-mix similarityView profile →

Evan Angelus, MD

Internal Medicine · West Haven, CT

Shared published services
1 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)
25%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.