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ICD-10-CM 2027 diagnosis code

J22Unspecified acute lower respiratory infection

✓ Billable / specific

J22 is a valid, billable ICD-10-CM code for unspecified acute lower respiratory infection. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About J22

J22 is the ICD-10-CM diagnosis code for unspecified acute lower respiratory infection. It belongs to block J20-J22 (other acute lower respiratory infections) and chapter 10 (diseases of the respiratory system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Don't report J22 together with the conditions in its Excludes1 note: upper respiratory infection (acute) (J06.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 205 (Other Respiratory System Diagnoses with MCC, relative weight 1.8244) and DRG 206 (Other Respiratory System Diagnoses without MCC, relative weight 0.9257), in MDC 04 (Diseases and Disorders of the Respiratory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 519.8 (other diseases of respiratory system, not elsewhere classified).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Acute (lower) respiratory (tract) infection NOS
Excludes1Not coded here — never report together with this code
  • upper respiratory infection (acute) (J06.9)

Notes that apply from higher levels

Instructions written at a parent level also apply to J22.

Broader instructions also apply from J20-J22 Other acute lower respiratory infections and Chapter 10: Diseases of the respiratory system.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to J22.

Codes whose notes reference J22

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 519.8Other diseases of respiratory system, not elsewhere classifiedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about J22

Is J22 billable?

Yes. J22 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J22 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J22 as a principal diagnosis.

Is J22 a CC or MCC?

No. J22 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does J22 group to?

J22 is used in the MS-DRG v44.0 logic for MS-DRG 205 (Other Respiratory System Diagnoses with MCC) and MS-DRG 206 (Other Respiratory System Diagnoses without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for J22?

The CMS General Equivalence Mappings map J22 to ICD-9-CM 519.8.