2026 ICD-10-CM Diagnosis Code Z90.2Acquired absence of lung [part of]

ICD-10-CM Codes›Z00–Z99›Z77-Z99›Z90

ICD-10-CM Z90.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z90.2 is a billable ICD-10-CM diagnosis code for acquired absence of lung [part of]. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 205 through 206. The code is not accepted as a principal diagnosis by the Medicare Code Editor and exempt from POA reporting. Coders also document this condition as H/O: pneumonectomy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acquired absence of limb or organ.

Code Identity

ICD-10-CM Code
Z90.2
Billable Status
Yes — Valid for Submission
Code Describes
Acquired absence of lung [part of]
Short Description
Acquired absence of lung [part of]
Same as the full description in the CMS dataset.
Parent Code
Z90
Acquired absence of organs, not elsewhere classified

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ77-Z99Persons with potential health hazards related to family and personal history and certain conditions influencing health status
CategoryZ90Acquired absence of organs, not elsewhere classified
This CodeZ90.2Acquired absence of lung [part of]

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z90.2.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

Z90.2 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • H/O: pneumonectomy
  • History of lung lobectomy
  • History of total lobectomy of lung

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Absence(of) (organ or part) (complete or partial)
      • lung (fissure) (lobe) (bilateral) (unilateral) (congenital)
        • acquired (any part)
    • Status(post)
      • pneumonectomy (complete) (partial)

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR FAC022
Acquired absence of limb or organ
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Lung Diseases

When you breathe, your lungs take in oxygen from the air and deliver it to the bloodstream. The cells in your body need oxygen to work and grow. During a normal day, you breathe nearly 25,000 times. People with lung disease have difficulty breathing. Millions of people in the U.S. have lung disease.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert Z90.2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V45.76 Acq absence of lung
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About Z90.2Overview

Is Z90.2 (Acquired absence of organs, not elsewhere classified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acquired absence of lung [part of] on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does Z90.2 group to?

On inpatient claims, acquired absence of lung [part of] maps to MS-DRG 205, 206, with relative weights from 0.9411 to 1.8310 depending on complications. Higher weights mean higher Medicare reimbursement.

Can Z90.2 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because acquired absence of lung [part of] describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Is Z90.2 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for acquired absence of lung [part of] on inpatient claims.

What is the ICD-9 equivalent of Z90.2?

Under the General Equivalence Mappings, acquired absence of lung [part of] converts to ICD-9-CM V45.76 (acq absence of lung). The mapping is a direct match.