Is ICD-10-CM code R43 billable?

No, R43 (Disturbances of smell and taste) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code R43 belong to?

R43 belongs to Chapter 18 of the ICD-10-CM tabular list: R00–R99 (Symptoms, Signs and Abnormal Clinical and Laboratory Findings).

R43Non-billable

Disturbances of smell and taste

Symptoms, Signs and Abnormal Clinical and Laboratory Findings·Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)·category·FY 2026

Use a more specific code (5 billable)

R43.0Anosmia R43.1Parosmia R43.2Parageusia R43.8Other disturbances of smell and taste R43.9Unspecified disturbances of smell and taste

CH18 Parent Instructions

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

abnormal findings on antenatal screening of mother (O28.-)
certain conditions originating in the perinatal period (P04-P96)
signs and symptoms classified in the body system chapters
signs and symptoms of breast (N63, N64.5)

R40-R46 Parent Instructions

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

symptoms and signs constituting part of a pattern of mental disorder (F01-F99)

Clinical Hierarchy

BillableHas subcodes

CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

R40-R46Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)

R43Disturbances of smell and tasteNot billable

R43.0AnosmiaBillable

R43.1ParosmiaBillable

R43.2ParageusiaBillable

R43.8Other disturbances of smell and tasteBillable

R43.9Unspecified disturbances of smell and tasteBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.