R68.12 Fussy infant (baby)

Billable ICD-10-CM code, FY2026.

Applicable to

• Irritable infant

Applies from R68.1 Nonspecific symptoms peculiar to infancy

Excludes1 (never code together)

• colic, infantile (R10.83)
• neonatal cerebral irritability (P91.3)
• teething syndrome (K00.7)

MS-DRG index

Defines the logic of DRG(s) 947-948 in MDC 23.

Approximate ICD-9-CM (GEMs)

• 780.91 Fussy infant (baby)

Medicare Code Edits (MCE v43.1 (April 2026))

• Pediatric diagnoses (age 0 through 17): Age conflict edit. These diagnoses are clinically expected only in patients age 0 through 17.

Diagnosis Index entries for R68.12

• Fussy baby
• Infant (s) › irritable child
• Irritable, irritability › infant

Nearby codes

• R68 Other general symptoms and signs
• R68.0 Hypothermia, not associated with low environmental temperature
• R68.1 Nonspecific symptoms peculiar to infancy
• R68.11 Excessive crying of infant (baby)
• R68.12 Fussy infant (baby) (this code)
• R68.13 Apparent life threatening event in infant (ALTE)
• R68.19 Other nonspecific symptoms peculiar to infancy
• R68.2 Dry mouth, unspecified
• R68.3 Clubbing of fingers
• R68.8 Other general symptoms and signs