Is ICD-10-CM code K37 billable?

Yes, K37 (Unspecified appendicitis) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code K37 belong to?

K37 belongs to Chapter 11 of the ICD-10-CM tabular list: K00–K95 (Diseases of the Digestive System).

K37Billable

Diseases of the Digestive System·Diseases of appendix (K35-K38)·category·FY 2026

Excludes2(Not included here. Code separately if applicable.)

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)

Excludes1(Not coded here. Use a different code.)

BillableHas subcodes

CH11Diseases of the digestive system (K00-K95)

K35-K38Diseases of appendix (K35-K38)

K37Unspecified appendicitisBillable

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement: