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ICD-10-CM 2027 diagnosis code

J11.08Influenza due to unidentified influenza virus with specified pneumonia

✓ Billable / specificMCC — major complication/comorbidity

J11.08 is a valid, billable ICD-10-CM code for influenza due to unidentified influenza virus with specified pneumonia. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Flu due to unidentified flu virus w specified pneumonia

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 J11.08

J11.08 is the ICD-10-CM diagnosis code for influenza due to unidentified influenza virus with specified pneumonia. It belongs to category J11 (influenza due to unidentified influenza virus), block J09-J18 (influenza and pneumonia) 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.

Within J11.0 (influenza due to unidentified influenza virus with pneumonia), J11.08 is specifically for influenza due to unidentified influenza virus with specified pneumonia. Related codes cover unspecified type of pneumonia (J11.00).

As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 177 (Respiratory Infections and Inflammations with MCC, relative weight 1.6092), DRG 178 (Respiratory Infections and Inflammations with CC, relative weight 0.9744), DRG 179 (Respiratory Infections and Inflammations without CC/MCC, relative weight 0.7345), DRG 193 (Simple Pneumonia and Pleurisy with MCC, relative weight 1.2825), DRG 194 (Simple Pneumonia and Pleurisy with CC, relative weight 0.7888) and DRG 195 (Simple Pneumonia and Pleurisy without CC/MCC, relative weight 0.6063), 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 487.0 (influenza with pneumonia).

Coding notes

Code alsoTwo codes may be needed; sequencing depends on circumstances
  • other specified type of pneumonia

Notes that apply from higher levels

Instructions written at a parent level also apply to J11.08.

› From J11.0 Influenza due to unidentified influenza virus with pneumonia
Code also
  • associated lung abscess, if applicable (J85.1)

Broader instructions also apply from J09-J18 Influenza and pneumonia and Chapter 10: Diseases of the respiratory system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to J11.08.

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 →
  • 487.0Influenza with pneumoniaapproximate

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 J11.08

Is J11.08 billable?

Yes. J11.08 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can J11.08 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict J11.08 as a principal diagnosis.

Is J11.08 a CC or MCC?

J11.08 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does J11.08 group to?

J11.08 is used in the MS-DRG v44.0 logic for MS-DRG 177 (Respiratory Infections and Inflammations with MCC), MS-DRG 178 (Respiratory Infections and Inflammations with CC), MS-DRG 179 (Respiratory Infections and Inflammations without CC/MCC), MS-DRG 193 (Simple Pneumonia and Pleurisy with MCC), MS-DRG 194 (Simple Pneumonia and Pleurisy with CC) and MS-DRG 195 (Simple Pneumonia and Pleurisy without CC/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 J11.08?

The CMS General Equivalence Mappings map J11.08 to ICD-9-CM 487.0.