F98.21 – Rumination disorder of infancy and childhood

ICD-10-CM 2027 diagnosis code · Behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Billable code

ICD-10-CM code F98.21

Code: F98.21 (claims format: F9821)
Description: Rumination disorder of infancy and childhood
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F90-F98 Behavioral and emotional disorders with onset usually occurring in childhood and adolescence
Parent codes: F98 › F98.2

Notes for F98.21

Applicable to:

Rumination disorder in infancy or childhood, in remission

Excludes1 (not coded here):

rumination disorder in adults (F50.84)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

F98 – Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence

Excludes2 (not included here):

breath-holding spells (R06.89)
gender identity disorder of childhood (F64.2)
Kleine-Levin syndrome (G47.13)
obsessive-compulsive disorder (F42.-)
sleep disorders not due to a substance or known physiological condition (F51.-)

F98.2 – Other feeding disorders of infancy and childhood

Excludes2 (not included here):

anorexia nervosa and other eating disorders (F50.-)
feeding difficulties (R63.3-)
feeding problems of newborn (P92.-)
pica of infancy or childhood (F98.3)

Block F90-F98

Notes:

Codes within categories F90-F98 may be used regardless of the age of a patient. These disorders generally have onset within the childhood or adolescent years, but may continue throughout life or not be diagnosed until adulthood

Index terms for F98.21

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in F98.2

F98.29 – Other feeding disorders of infancy and early childhoodBillable

Frequently asked questions

What is ICD-10 code F98.21?

F98.21 is the ICD-10-CM code for rumination disorder of infancy and childhood, in the block F90-F98 (Behavioral and emotional disorders with onset usually occurring in childhood and adolescence).

Is F98.21 a billable code?

Yes. F98.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F98.21 belong to?

It belongs to category F98 – Other behavioral and emotional disorders with onset usually occurring in childhood and adolescence.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.