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ICD-10-CM 2027 diagnosis code

R48.0Dyslexia and alexia

✓ Billable / specific

R48.0 is a valid, billable ICD-10-CM code for dyslexia and alexia. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Alexia, ICD-10 code for Dyslexia.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R48.0

R48.0 is the ICD-10-CM diagnosis code for dyslexia and alexia. It belongs to category R48 (dyslexia and other symbolic dysfunctions, not elsewhere classified), block R47-R49 (symptoms and signs involving speech and voice) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R48 (dyslexia and other symbolic dysfunctions, not elsewhere classified), R48.0 is specifically for dyslexia and alexia. Related codes cover agnosia (R48.1), apraxia (R48.2), visual agnosia (R48.3), other symbolic dysfunctions (R48.8) and unspecified symbolic dysfunctions (R48.9).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 886 (Behavioral and Developmental Disorders, relative weight 1.8678), in MDC 19 (Mental Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 315.01 (alexia) and 784.61 (alexia and dyslexia).

Notes that apply from higher levels

Instructions written at a parent level also apply to R48.0.

› From R48 Dyslexia and other symbolic dysfunctions, not elsewhere classified
Excludes1
  • specific developmental disorders of scholastic skills (F81.-)

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

8 entries

Terms in the official ICD-10-CM index that lead to R48.0.

Codes whose notes reference R48.0

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 19 · Mental Diseases and Disorders

ICD-9-CM equivalent

Converter →

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R48.0

Is R48.0 billable?

Yes. R48.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R48.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R48.0 as a principal diagnosis.

Is R48.0 a CC or MCC?

No. R48.0 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R48.0 group to?

R48.0 is used in the MS-DRG v44.0 logic for MS-DRG 886 (Behavioral and Developmental Disorders). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R48.0?

The CMS General Equivalence Mappings map R48.0 to ICD-9-CM 315.01 and 784.61.