ICD-10-CM 2027
ICD-10 code for Spelling specific difficult
From the official ICD-10-CM alphabetic index entry “Difficult, difficulty (in) › spelling (specific)”. Page updated September 29, 2026.
About coding Spelling specific difficult
The ICD-10-CM code for Spelling specific difficult is F81.81 (Disorder of written expression). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on F81.81.
Within F81.8 (other developmental disorders of scholastic skills), F81.81 is specifically for disorder of written expression. Related codes cover other developmental disorders of scholastic skills (F81.89).
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.
More specific Spelling specific difficult codes (official index)
Common questions about Spelling specific difficult ICD-10 codes
What is the ICD-10 code for Spelling specific difficult?
- F81.81 — Disorder of written expression. More specific codes apply when the documentation supports them: F81.89, Z55.8.
Is F81.81 billable?
- Yes. F81.81 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F81.81 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F81.81 as a principal diagnosis.
Is F81.81 a CC or MCC?
- No. F81.81 is neither a CC nor an MCC under MS-DRG v44.0.