2026 ICD-10-CM Diagnosis Code R48.1Agnosia

ICD-10-CM Codes›R00–R99›R47-R49›R48

ICD-10-CM R48.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R48.1 is a billable ICD-10-CM diagnosis code for agnosia. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system signs and symptoms.

Code Identity

ICD-10-CM Code
R48.1
Billable Status
Yes — Valid for Submission
Code Describes
Agnosia
Short Description
Agnosia
Same as the full description in the CMS dataset.
Parent Code
R48
Dyslexia and other symbolic dysfunctions, not elsewhere classified

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR47-R49Symptoms and signs involving speech and voice
CategoryR48Dyslexia and other symbolic dysfunctions, not elsewhere classified
This CodeR48.1Agnosia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Agnosia
  • Agnosia for pain
  • Agnosia for smell
  • Agnosia for taste
  • Agnosia for temperature
  • Anosodiaphoria
  • Aphasia, agnosia, dyslexia AND/OR apraxia
  • Auditory agnosia
  • Autotopagnosia
  • Congenital auditory agnosia
  • Finger agnosia
  • Ideational agnosia
  • Organic disorder of body schema
  • Position agnosia
  • Sensory agnosia
  • Somatosensory agnosia
  • Tactile agnosia
  • Time agnosia

Tabular List NotesGuidance

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

Inclusion Terms

  • Astereognosia (astereognosis)
  • Autotopagnosia

Type 1 Excludes

  • visual object agnosia R48.3

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.

    • Agnosia(body image) (other senses) (tactile)
    • Agnosia(body image) (other senses) (tactile)
      • verbal
    • Agnosia(body image) (other senses) (tactile)
      • verbal
        • auditory
    • Astereognosia, astereognosis
    • Autotopagnosia

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

Clinical InformationClinical

  • Agnosia

    loss of the ability to comprehend the meaning or recognize the importance of various forms of stimulation that cannot be attributed to impairment of a primary sensory modality. tactile agnosia is characterized by an inability to perceive the shape and nature of an object by touch alone, despite unimpaired sensation to light touch, position, and other primary sensory modalities.

  • Alexia, Pure

    loss of the power to comprehend written materials despite preservation of the ability to write (i.e., alexia without agraphia). this condition is generally attributed to lesions that disconnect the visual cortex of the non-dominant hemisphere from language centers in the dominant hemisphere. this may occur when a dominant visual cortex injury is combined with underlying white matter lesions that involve crossing fibers from the occipital lobe of the opposite hemisphere. (from adams et al., principles of neurology, 6th ed, p483)

  • Prosopagnosia

    the inability to recognize a familiar face or to learn to recognize new faces. this visual agnosia is most often associated with lesions involving the junctional regions between the temporal and occipital lobes. the majority of cases are associated with bilateral lesions, however unilateral damage to the right occipito-temporal cortex has also been associated with this condition. (from cortex 1995 jun;31(2):317-29).

  • Agnosia

    a rare disorder characterized by the lack of ability to recognize individuals, objects, shapes, sounds, or smells. there is no loss of memory. it is caused by neurological damage in the brain, specifically in the occipital or parietal lobes.

  • Pain Agnosia|Analgesia

    loss of the ability to perceive and process pain.

  • Prosopagnosia|Face Blindness

    impaired ability to recognize other human faces in the absence of a vision disorder. it may be a congenital disorder or the result of brain injury.

  • Simultanagnosia

    a symptom describing the inability to comprehend more than one element of a visual picture at a given moment, or to integrate the whole visual picture.

  • Visual Agnosia|Visual agnosia

    an inability to recognize or interpret objects by sight.

Patient EducationClinical

Mental Disorders

Mental disorders (or mental illnesses) are conditions that affect your thinking, feeling, mood, and behavior. They may happen over a short period of time or come and go. Some can be chronic (long-lasting). They can affect your ability to relate to others and function each day..

The full article covers:

  • What are mental disorders?
  • What are some types of mental disorders?
  • What causes mental disorders?
  • Who is at risk for mental disorders?
  • How are mental disorders diagnosed?
  • What are the treatments for mental disorders?

Read the full article at MedlinePlus

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

Convert R48.1 to ICD-9-CMHistory

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

ICD-9-CM
784.69 Symbolic dysfunction NEC
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 R48.1Overview

Is R48.1 a billable code?

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

Can R48.1 be a principal diagnosis?

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

What is the ICD-9 equivalent of R48.1?

Under the General Equivalence Mappings, agnosia converts to ICD-9-CM 784.69 (symbolic dysfunction NEC). 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.