2026 ICD-10-CM Diagnosis Code G89.12Acute post-thoracotomy pain

ICD-10-CM Codes›G00–G99›G89-G99›G89

ICD-10-CM G89.12
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G89.12 is a billable ICD-10-CM diagnosis code for acute post-thoracotomy pain. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. Coders also document this condition as acute chest pain. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system pain and pain syndromes.

Code Identity

ICD-10-CM Code
G89.12
Billable Status
Yes — Valid for Submission
Code Describes
Acute post-thoracotomy pain
Short Description
Acute post-thoracotomy pain
Same as the full description in the CMS dataset.
Parent Code
G89.1
Acute pain, not elsewhere classified

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG89Pain, not elsewhere classified
This CodeG89.12Acute post-thoracotomy pain

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute chest pain
  • Acute postoperative pain
  • Acute postthoracotomy pain syndrome
  • Post-thoracotomy pain syndrome

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Post-thoracotomy pain NOS

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR NVS019
Nervous system pain and pain syndromes
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Pain

Pain is a signal in your nervous system that something may be wrong. It is an unpleasant feeling, such as a prick, tingle, sting, burn, or ache. Each person feels pain differently, even if the reason for the pain is the same. Pain may be sharp or dull. It may be mild or severe. Pain may come and go, or it may be constant.

The full article covers:

  • What is pain?
  • What are the types of pain?
  • What causes pain?
  • How is pain diagnosed?
  • What are the treatments for pain?

Read the full article at MedlinePlus

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

Convert G89.12 to ICD-9-CMHistory

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

ICD-9-CM
338.12 Acute post-thoracot pain
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 G89.12Overview

What is the ICD-10 code for acute post-thoracotomy pain?

The ICD-10-CM code for acute post-thoracotomy pain is G89.12 (sometimes written as G8912). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is G89.12 (Acute pain, not elsewhere classified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acute post-thoracotomy pain on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does G89.12 group to?

When acute post-thoracotomy pain is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of G89.12?

Under the General Equivalence Mappings, acute post-thoracotomy pain converts to ICD-9-CM 338.12 (acute post-thoracot pain). The mapping is a direct match.