Alphabetic Index FY2027

K00.4

Disturbances in tooth formation

FY2027Chapter 11: Diseases of the digestive system/K00–K14 Diseases of oral cavity and salivary glands

BillableComplete code, valid to report

K00.4 (also written K004) is a billable ICD-10-CM diagnosis code for disturbances in tooth formation. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 10 codes in category K00 (Disorders of tooth development and eruption). The Alphabetic Index lists it under 13 entries. Its coding notes include 1 Excludes1 entry and 10 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • Hutchinson's teeth and mulberry molars in congenital syphilis (A50.5)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
Inherited from K00 Disorders of tooth development and eruption
  • embedded and impacted teeth (K01.-)
Also from chapter/block level (8 notes)
Inherited from Chapter 11 Diseases of the digestive system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Inclusion terms

Conditions classified to this code.

This code
  • Aplasia and hypoplasia of cementum
  • Dilaceration of tooth
  • Enamel hypoplasia (neonatal) (postnatal) (prenatal)
  • Regional odontodysplasia
  • Turner's tooth

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 13 entries

Show 1 more