All ICD10 Codes

J45.909

Billable
ChapterJ00–J99
Ranksubcategory
Official Description

Unspecified asthma, uncomplicated

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 10: Diseases of the Respiratory System (J00-J99).

Instructional Notes

Includes
  • Asthma NOS
Excludes2(Not included here)
  • lung diseases due to external agents (J60-J70)
General instructions are available for the parent sections:
View CH10 NotesView J40-J4A NotesView J45 NotesView J45.90 Notes

Clinical Hierarchy

CH10Diseases of the respiratory system (J00-J99)
J40-J4AChronic lower respiratory diseases (J40-J4A)
J45Asthma
J45.9Other and unspecified asthma
J45.90Unspecified asthma
J45.909Unspecified asthma, uncomplicated

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to J45.909:

subcategoryJ45.90
Unspecified asthma
View context instructions
blockJ40-J4A
Chronic lower respiratory diseases (J40-J4A)
View context instructions
chapterCH10
Diseases of the respiratory system (J00-J99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to J45.909. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

14 raw paths
Asthma, asthmatic (bronchial) (catarrh) (spasmodic)7 unique routes
Direct index entry→J45.909
allergic extrinsic→J45.909
childhood→J45.909
late-onset→J45.909
mixed→J45.909
nonallergic (intrinsic)→J45.909
predominantly allergic→J45.909
Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous)1 unique routes
allergic (acute)→J45.909
Dyspnea (nocturnal) (paroxysmal)2 unique routes
asthmatic (bronchial)→J45.909(2 variants)
with
bronchitis→J45.909
Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)1 unique routes
hay (allergic)
with asthma (bronchial)→J45.909
IgE asthma1 unique routes
Direct index entry→J45.909
Obstruction, obstructed, obstructive1 unique routes
airway
with
asthma→J45.909
Rhinitis (atrophic) (catarrhal) (chronic) (croupous) (fibrinous) (granulomatous) (hyperplastic) (hypertrophic) (membranous) (obstructive) (purulent) (suppurative) (ulcerative)1 unique routes
allergic
with asthma→J45.909

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 202
Bronchitis and Asthma with CC/MCC
DRG 203
Bronchitis and Asthma without CC/MCC

Cross Reference

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