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Unspecified chronic bronchitis: ICD-10 J42

ICD-10 J42 (Unspecified chronic bronchitis) falls in Medicare's COPD chronic-condition class. In 2024, 876,229 Medicare providers had COPD patients in their panels: an estimated 66.6M panel patients nationally, from public CMS data.

The list

Which providers see COPD patients.

The top 5 nationally, ranked by estimated COPD patients in their 2024 Medicare panel. Panel-prevalence estimate: these are providers whose patients carry this condition class, not providers who billed this exact code.

#	Provider	Specialty	Location	Est. COPD patients	Panel share
1	David Chess, M.D.	Geriatric Medicine	Stratford, CT	38,182	34%
2	Wilfredo Blasini, M.D.	Pathology	Fort Myers, FL	24,462	25%
3	Justin Poling, M.D.	Pathology	Nashville, TN	23,528	16%
4	Harvey Paley, M.D.	Otolaryngology	Encino, CA	11,760	36%
5	James Graham, M.D.	Diagnostic Radiology	Tacoma, WA	10,844	40%

Big-panel specialties like pathology rank high here because the estimate comes from panel composition, not from visits for the condition. Filter to the specialties you call on inside the app.

876,224 more providers saw COPD patients in 2024. The full ranked list (filtered to your exact territory, with phone numbers and panel trends) is one search in Prospect 811. A code lookup tells you what J42 means; this tells you who to call on.

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The context

Around J42.

What COPD patients also carry

Schizophrenia / Psychosis6.0% of panels vs 4.9% baseline (×1.24)

Alzheimer's / Dementia16.8% of panels vs 13.6% baseline (×1.23)

Heart Failure29.4% of panels vs 24.4% baseline (×1.21)

Bipolar Disorder7.6% of panels vs 6.5% baseline (×1.18)

Tobacco Use13.3% of panels vs 11.3% baseline (×1.17)

Ecological estimate from panel composition, weighted by COPD patient volume: talk-track context, not a clinical claim. Explore the full comorbidity map →

About this code

CMS ICD-10-CM descriptionUnspecified chronic bronchitis

Condition class (CCW)COPD

Providers with it in panel (2024)876,229

Avg. share of those panels22.0%

Where these numbers come from. Everything on this page is computed from CMS's public Medicare Physician & Other Practitioners - by Provider file for 2024, the most recent year released. CMS reports, for each provider, the share of their Medicare patient panel carrying each of 25 chronic-condition classes. "Est. patients" is panel size × that share, so a patient who sees three providers counts in three panels: these are panel-level estimates, not unique patient counts. Panel-prevalence estimate: these are providers whose patients carry this condition class, not providers who billed this exact code. Prevalence shares are top-coded at 75% and suppressed for small panels: a missing value never means zero. The data covers traditional Medicare fee-for-service only (no commercial insurance, no Medicare Advantage), and CMS suppresses low-volume lines before publishing. The code description is CMS's own ICD-10-CM wording. Comorbidity figures are ecological estimates from panel composition, not patient records. Prospect 811 organizes public data; it doesn't add to or alter it. Not affiliated with or endorsed by CMS. Full detail on the data page.

Related COPD codes:
J44.9 J44.0 J40 J41.0 J41.1 → all codes · → look up any ICD-10 code

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