J12.3 – Human metapneumovirus pneumonia

ICD-10-CM 2027 diagnosis code · Influenza and pneumonia

Billable code

ICD-10-CM code J12.3

Code: J12.3 (claims format: J123)
Description: Human metapneumovirus pneumonia
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: J09-J18 Influenza and pneumonia
Parent codes: J12

Notes inherited from parent codes

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

J12 – Viral pneumonia, not elsewhere classified

Includes:

bronchopneumonia due to viruses other than influenza viruses

Excludes2 (not included here):

aspiration pneumonia due to anesthesia during labor and delivery (O74.0)
aspiration pneumonia due to anesthesia during pregnancy (O29)
aspiration pneumonia due to anesthesia during puerperium (O89.0)
aspiration pneumonia due to solids and liquids (J69.-)
aspiration pneumonia NOS (J69.0)
congenital pneumonia (P23.0)
congenital rubella pneumonitis (P35.0)
interstitial pneumonia NOS (J84.9)
lipid pneumonia (J69.1)
neonatal aspiration pneumonia (P24.-)

Code first:

associated influenza, if applicable (J09.X1, J10.0-, J11.0-)

Code also:

associated abscess, if applicable (J85.1)

Block J09-J18

Excludes2 (not included here):

allergic or eosinophilic pneumonia (J82)
aspiration pneumonia NOS (J69.0)
meconium pneumonia (P24.01)
neonatal aspiration pneumonia (P24.-)
pneumonia due to solids and liquids (J69.-)
congenital pneumonia (P23.9)
lipid pneumonia (J69.1)
rheumatic pneumonia (I00)
ventilator associated pneumonia (J95.851)

Use additional code:

code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)

Index terms for J12.3

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

Related codes in J12

J12.0 – Adenoviral pneumoniaBillable
J12.1 – Respiratory syncytial virus pneumoniaBillable
J12.2 – Parainfluenza virus pneumoniaBillable
J12.8 – Other viral pneumoniaHeader
J12.9 – Viral pneumonia, unspecifiedBillable

Frequently asked questions

What is ICD-10 code J12.3?

J12.3 is the ICD-10-CM code for human metapneumovirus pneumonia, in the block J09-J18 (Influenza and pneumonia).

Is J12.3 a billable code?

Yes. J12.3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J12.3 belong to?

It belongs to category J12 – Viral pneumonia, not elsewhere classified.

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.