2026 ICD-10-CM Diagnosis Code R09.A0Foreign body sensation, unspecified

ICD-10-CM Codes›R00–R99›R00-R09›R09

ICD-10-CM R09.A0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R09.A0 is a billable ICD-10-CM diagnosis code for foreign body sensation, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. 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 foreign body sensation. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under General sensation/perception signs and symptoms.

Code Identity

ICD-10-CM Code
R09.A0
Billable Status
Yes — Valid for Submission
Code Describes
Foreign body sensation, unspecified
Short Description
Foreign body sensation, unspecified
Same as the full description in the CMS dataset.
Parent Code
R09.A
Foreign body sensation of the circulatory and respiratory system

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR00-R09Symptoms and signs involving the circulatory and respiratory systems
CategoryR09Other symptoms and signs involving the circulatory and respiratory system
This CodeR09.A0Foreign body sensation, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Foreign body sensation
  • Sensation of a lesion

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.

    • Sensation
      • foreign body

Clinical ClassificationClinical

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

CCSR SYM015
General sensation/perception signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Code History & ChangesHistory

Replacement R09.A0 replaces the following previously assigned code(s):

  • R09.89 - Oth symptoms and signs involving the circ and resp systems
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R09.A0Overview

Is R09.A0 a billable code?

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

What MS-DRG does R09.A0 group to?

When foreign body sensation, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R09.A0 be a principal diagnosis?

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

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.