R49.21 Hypernasality

Billable ICD-10-CM code, FY2026.

Applies from R49 Voice and resonance disorders

Excludes1 (never code together)

• psychogenic voice and resonance disorders (F44.4)

MS-DRG index

Defines the logic of DRG(s) 154-156 in MDC 03.

Approximate ICD-9-CM (GEMs)

• 784.43 Hypernasality

Diagnosis Index entries for R49.21

• Hypernasality

Nearby codes

• R49 Voice and resonance disorders
• R49.0 Dysphonia
• R49.1 Aphonia
• R49.2 Hypernasality and hyponasality
• R49.21 Hypernasality (this code)
• R49.22 Hyponasality
• R49.8 Other voice and resonance disorders
• R49.9 Unspecified voice and resonance disorder