J01.9 – Acute sinusitis, unspecified

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

Non-billable header

ICD-10-CM code J01.9

Code: J01.9 (claims format: J019)
Description: Acute sinusitis, unspecified
Billable: No – use a more specific code below
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

Billable codes under J01.9

J01.9 is a header code and cannot be used on claims. Choose the most specific code:

J01.90 – Acute sinusitis, unspecifiedBillable
J01.91 – Acute recurrent sinusitis, unspecifiedBillable

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)

Related codes in J01

J01.0 – Acute maxillary sinusitisHeader
J01.1 – Acute frontal sinusitisHeader
J01.2 – Acute ethmoidal sinusitisHeader
J01.3 – Acute sphenoidal sinusitisHeader
J01.4 – Acute pansinusitisHeader
J01.8 – Other acute sinusitisHeader

Frequently asked questions

What is ICD-10 code J01.9?

J01.9 is the ICD-10-CM code for acute sinusitis, unspecified, in the block J00-J06 (Acute upper respiratory infections).

Is J01.9 a billable code?

No. J01.9 is a header code with more specific child codes; report one of the billable codes listed above.

What category does J01.9 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.