2026 ICD-10-CM Diagnosis Code G89.18Other acute postprocedural pain

ICD-10-CM Codes›G00–G99›G89-G99›G89

ICD-10-CM G89.18
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G89.18 is a billable ICD-10-CM diagnosis code for other acute postprocedural 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system pain and pain syndromes.

Code Identity

ICD-10-CM Code
G89.18
Billable Status
Yes — Valid for Submission
Code Describes
Other acute postprocedural pain
Short Description
Other acute postprocedural 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 CodeG89.18Other acute postprocedural pain

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute pain following mastectomy
  • Acute postoperative pain
  • Finding of sensation of testes
  • Pain during postpartum period due to and following cesarean section
  • Pain following procedure
  • Pain following radiation therapy
  • Pain in back following surgical procedure
  • Pain in testicle
  • Persistent pain following procedure
  • Post-abdominoperineal resection pain
  • Postcordotomy pain
  • Post-episiotomy pain
  • Post-herniorraphy pain
  • Post-mastectomy pain
  • Postoperative pain
  • Postprocedural testicular pain
  • Post-vasectomy pain
  • Tenderness following procedure

Tabular List NotesGuidance

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

Inclusion Terms

  • Postoperative pain NOS
  • Postprocedural pain NOS

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.

    • Pain(s)
      • acute
        • postprocedural NEC
    • Pain(s)
      • postoperative NOS
    • Pain(s)
      • postprocedural NOS

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 G89.18 to ICD-9-CMHistory

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

ICD-9-CM
338.18 Acute postop pain NEC
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 G89.18Overview

Is G89.18 (Acute pain, not elsewhere classified) a billable code?

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

What MS-DRG does G89.18 group to?

When other acute postprocedural 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 G89.18?

Under the General Equivalence Mappings, other acute postprocedural pain converts to ICD-9-CM 338.18 (acute postop pain NEC). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.