What does ICD-10 code J99 mean?

J99 is the ICD-10-CM diagnosis code for Respiratory disorders in diseases classified elsewhere. Respiratory disorders in diseases classified elsewhere

Is J99 a billable ICD-10 code?

Yes, J99 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is J99 in?

J99 is classified under Chapter 10: Diseases of the respiratory system (J00-J99), Section J96-J99: Other diseases of the respiratory system (J96-J99).

What are the includes and excludes for J99?

Excludes1 (not coded here): respiratory disorders in:; amebiasis (A06.5); blastomycosis (B40.0-B40.2).

J99 Respiratory disorders in diseases classified elsewhere

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The ICD-10-CM code for Respiratory disorders in diseases classified elsewhere is J99 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 10: Diseases of the respiratory system (J00-J99)
Section: J96-J99: Other diseases of the respiratory system (J96-J99)
Category J99: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Excludes1

Not coded here. These conditions should NOT be coded together with J99.

respiratory disorders in:
amebiasis (A06.5)
blastomycosis (B40.0-B40.2)
candidiasis (B37.1)
coccidioidomycosis (B38.0-B38.2)
cystic fibrosis with pulmonary manifestations (E84.0)
dermatomyositis (M33.01, M33.11)
histoplasmosis (B39.0-B39.2)
late syphilis (A52.72, A52.73)
polymyositis (M33.21)
Sjögren syndrome (M35.02)
systemic lupus erythematosus (M32.13)
systemic sclerosis (M34.81)
Wegener's granulomatosis (M31.30-M31.31)

Code First

underlying disease, such as:
amyloidosis (E85.-)
ankylosing spondylitis (M45.-)
congenital syphilis (A50.-)
cryoglobulinemia (D89.1)
early congenital syphilis (A50.0-)
plasminogen deficiency (E88.02)
schistosomiasis (B65.0-B65.9)

U.S. Hospital Utilization

An estimated 1,110 U.S. inpatient stays in 2023 included J99 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 10 header (context)

10. Chapter 10: Diseases of the Respiratory System (J00-J99), U07.0

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.10

COPD/asthma: acute exacerbation vs uncomplicated

a. Chronic Obstructive Pulmonary Disease [COPD] and Asthma 1) Acute exacerbation of chronic obstructive bronchitis and asthma The codes in categories J44 and J45 distinguish between uncomplicated cases and those in acute exacerbation. An acute exacerbation is a worsening or a decompensation of a chronic condition. An acute exacerbation is not equivalent to an infection superimposed on a chronic condition, though an exacerbation may be triggered by an infection.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.10.a.1

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference J99 with the canonical source and edition:

J99 — Respiratory disorders in diseases classified elsewhere. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/J99

Canonical URL: https://icd10codingpro.com/codes/J99