J01.21 – Acute recurrent ethmoidal sinusitis

ICD-10-CM 2027 diagnosis code · Acute upper respiratory infections

Billable code

ICD-10-CM code J01.21

Code: J01.21 (claims format: J0121)
Description: Acute recurrent ethmoidal sinusitis
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 10. Diseases of the respiratory system (J00-J99)
Block: J00-J06 Acute upper respiratory infections
Parent codes: J01 › J01.2

Notes inherited from parent codes

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

J01 – Acute sinusitis

Includes:

acute abscess of sinus
acute empyema of sinus
acute infection of sinus
acute inflammation of sinus
acute suppuration of sinus

Excludes1 (not coded here):

sinusitis NOS (J32.9)

Excludes2 (not included here):

chronic sinusitis (J32.0-J32.8)

Use additional code:

code (B95-B97) to identify infectious agent.

Block J00-J06

Excludes1 (not coded here):

chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)

Index terms for J01.21

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

Related codes in J01.2

J01.20 – Acute ethmoidal sinusitis, unspecifiedBillable

Frequently asked questions

What is ICD-10 code J01.21?

J01.21 is the ICD-10-CM code for acute recurrent ethmoidal sinusitis, in the block J00-J06 (Acute upper respiratory infections).

Is J01.21 a billable code?

Yes. J01.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J01.21 belong to?

It belongs to category J01 – Acute sinusitis.

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.