ICD-10-CM 2027 diagnosis code
A06.5Amebic lung abscess
A06.5 is a valid, billable ICD-10-CM code for amebic lung abscess. 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 A06.5
A06.5 is the ICD-10-CM diagnosis code for amebic lung abscess. It belongs to category A06 (amebiasis), block A00-A09 (intestinal infectious diseases) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within A06 (amebiasis), A06.5 is specifically for amebic lung abscess. Related codes cover acute amebic dysentery (A06.0), chronic intestinal amebiasis (A06.1), amebic nondysenteric colitis (A06.2), Ameboma of intestine (A06.3), amebic liver abscess (A06.4), amebic brain abscess (A06.6), cutaneous amebiasis (A06.7), amebic infection of other sites (A06.8) and 1 more.
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) and DRG 179 (Respiratory Infections and Inflammations without CC/MCC, relative weight 0.7345), 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 006.4 (amebic lung abscess).
Coding notes
- Amebic abscess of lung (and liver)
Notes that apply from higher levels
Instructions written at a parent level also apply to A06.5.
› From A06 Amebiasis
Broader instructions also apply from Chapter 1: Certain infectious and parasitic diseases.
Alphabetic index entries
4 entriesTerms in the official ICD-10-CM index that lead to A06.5.
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › amebic › lung (and liver) (without mention of brain abscess)
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › liver (cholangitic) (hematogenic) (lymphogenic) (pylephlebitic) (pyogenic) › amebic (due to Entamoeba histolytica) (dysenteric) (tropical) › with › lung abscess
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › lung (miliary) (putrid) › amebic (with liver abscess)
- Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) › lung (miliary) (putrid) › amebic (with liver abscess) › with › pneumonia
Codes whose notes reference A06.5
- J99Excludes1
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.
MDC 04 · Diseases and Disorders of the Respiratory System
ICD-9-CM equivalent
Converter →- 006.4Amebic lung abscessexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A06.5
Is A06.5 billable?
- Yes. A06.5 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A06.5 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A06.5 as a principal diagnosis.
Is A06.5 a CC or MCC?
- A06.5 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does A06.5 group to?
- A06.5 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) and MS-DRG 179 (Respiratory Infections and Inflammations 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 A06.5?
- The CMS General Equivalence Mappings map A06.5 to ICD-9-CM 006.4.