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DUVALL, WILLIAMM.D. NPI 1174560403 Clinician

Cardiology · HARTFORD, CT

Specialty Cardiology — from billed Medicare claims
Trained YALE UNIVERSITY SCHOOL OF MEDICINE — medical school, self-reported to CMS
In practice about 28 years since medical school (class of 1998, self-reported to CMS)
Location HARTFORD, CT · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 15 codes billed · 769 disclosed services (CY2024 — most recent year in data)
Current groups

Group affiliation since 2019

20192026
HARTFORD HOSPITAL
2019–2026

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2013-07

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

Premium

The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Unlock to see the figure.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
93306 Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
93018 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician
78803 Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging
93016 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician
78431 Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan
78452 Nuclear medicine studies of heart muscle at rest and with stress and spect
78434 Nuclear medicine study of heart muscle blood flow by pet
93308 Ultrasound of heart, follow-up
93356 Heart muscle strain imaging
93312 Ultrasound of heart with probe in esophagus, with report
93320 Ultrasound of heart blood flow, valves and chambers
93319 3d ultrasound imaging of heart for evaluation of heart structure performed during ultrasound imaging of congenital heart defects
93325 Ultrasound of heart with color-depicted blood flow, rate and valve function
99221 Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes
78451 Nuclear medicine study of heart muscle at rest and with stress and spect

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.