Alphabetic Index FY2027

K05.311

Chronic periodontitis, localized, slight

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

BillableComplete code, valid to report

K05.311 (also written K05311) is a billable ICD-10-CM diagnosis code for chronic periodontitis, localized, slight. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 25 codes in category K05 (Gingivitis and periodontal diseases). The Alphabetic Index lists it under 1 entry. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 8 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

Inherited from K05 Gingivitis and periodontal diseases
  • code to identify:
    • alcohol abuse and dependence (F10.-)
    • exposure to environmental tobacco smoke (Z77.22)
    • exposure to tobacco smoke in the perinatal period (P96.81)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)

Excludes1

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

Inherited from K05.3 Chronic periodontitis
  • chronic apical periodontitis (K04.5)

Excludes2

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

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)

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 1 entry