DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

F73 diagnosis code · Billable category · FY2027

F73 Profound intellectual disabilities

  • Billable
  • CC
  • POA reported

F73 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 5 Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
  2. F70-F79 Intellectual Disabilities (F70-F79)
  3. F73 Profound intellectual disabilities
CC / MCC
CC
MS-DRG
884
HCC V28
–
POA
Reported
Code Editor
–
Index entries
3

Instructions

At F73

Inclusion terms

  • IQ level below 20-25
  • Profound mental subnormality

Notes that also apply

Block F70-F79 instructions (Excludes1 1, Code first 1): printed on the block page.

Chapter 5 instructions (Includes 1, Excludes2 1): printed on the chapter 5 page.

Index entries

  • Idiot, idiocy (congenital) → F73
  • I.Q.under 20 → F73
  • Disability, disabilitiesintellectualprofound (I.Q. under 20) → F73

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for F73
CC / MCCCC
PDX exclusion list0657 (2 codes)
Appendix BMDC 19 Mental Diseases and Disorders, MS-DRG 884 (Organic Disturbances and Intellectual Disability…)
Code Editor–
POAReported
HCC V28–

CC as a secondary diagnosis, not when the principal diagnosis is on its PDX exclusion list.

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy