2026 ICD-10-CM Diagnosis Code G90.512Complex regional pain syndrome I of left upper limb

ICD-10-CM Codes›G00–G99›G89-G99›G90

ICD-10-CM G90.512
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G90.512 is a billable ICD-10-CM diagnosis code for complex regional pain syndrome I of left upper limb. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as chronic pain of left upper limb. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system pain and pain syndromes.

Code Identity

ICD-10-CM Code
G90.512
Billable Status
Yes — Valid for Submission
Code Describes
Complex regional pain syndrome I of left upper limb
Short Description
Complex regional pain syndrome I of left upper limb
Same as the full description in the CMS dataset.
Parent Code
G90.51
Complex regional pain syndrome I of upper limb

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG89-G99Other disorders of the nervous system
CategoryG90Disorders of autonomic nervous system
This CodeG90.512Complex regional pain syndrome I of left upper limb

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic pain of left upper limb
  • Complex regional pain syndrome of upper limb
  • Complex regional pain syndrome type I
  • Complex regional pain syndrome type I of left upper limb
  • Neuralgia of left upper limb

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

Complex Regional Pain Syndrome

Complex regional pain syndrome (CRPS) is a chronic pain condition. It causes intense pain, usually in the arms, hands, legs, or feet. It may happen after an injury, either to a nerve or to tissue in the affected area. Rest and time may only make it worse.

Read the full article at MedlinePlus

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

Convert G90.512 to ICD-9-CMHistory

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

ICD-9-CM
337.21 Rflx sym dystrph up limb
Approximate The match is approximate rather than exact.

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 G90.512Overview

Is G90.512 (Complex regional pain syndrome I of upper limb) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report complex regional pain syndrome I of left upper limb on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of G90.512?

Under the General Equivalence Mappings, complex regional pain syndrome I of left upper limb converts to ICD-9-CM 337.21 (rflx sym dystrph up limb). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.