2026 ICD-10-CM Diagnosis Code R27.9Unspecified lack of coordination

ICD-10-CM Codes›R00–R99›R25-R29›R27

ICD-10-CM R27.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R27.9 is a billable ICD-10-CM diagnosis code for unspecified lack of coordination. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as bumps into things. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system signs and symptoms.

Code Identity

ICD-10-CM Code
R27.9
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified lack of coordination
Short Description
Unspecified lack of coordination
Same as the full description in the CMS dataset.
Parent Code
R27
Other lack of coordination

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR25-R29Symptoms and signs involving the nervous and musculoskeletal systems
CategoryR27Other lack of coordination
This CodeR27.9Unspecified lack of coordination

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bumps into things
  • Clumsy child
  • Coordination problem
  • Finding of pattern of coordination
  • Incoordination
  • Incoordination symptom
  • Stumbling due to lack of coordination
  • Stumbling gait

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.

    • Lack of
      • coordination

Clinical ClassificationClinical

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

CCSR SYM010
Nervous system signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Movement Disorders

Movement disorders are neurologic conditions that cause problems with movement, such as:

Read the full article at MedlinePlus

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

Convert R27.9 to ICD-9-CMHistory

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

ICD-9-CM
781.3 Lack of coordination
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 R27.9Overview

Is R27.9 (Other lack of coordination) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified lack of coordination on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can R27.9 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the unspecified lack of coordination is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R27.9?

Under the General Equivalence Mappings, unspecified lack of coordination converts to ICD-9-CM 781.3 (lack of coordination). The mapping is approximate, so confirm the match fits the documentation.

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.