ICD-10 Code for Pneumonia

Also indexed as (acute) (double) (migratory) (purulent) (septic) (unresolved)

The ICD-10-CM code for pneumonia is J18.9 — Pneumonia, unspecified organism. This is the code the Alphabetic Index gives for pneumonia with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

J18.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which pneumonia code should you use?

The Alphabetic Index lists 104 codes under Pneumonia. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

2019coronavirus	J12.82	Pneumonia due to coronavirus disease 2019
adenoviral	J12.0	Adenoviral pneumonia
adynamic	J18.2	Hypostatic pneumonia, unspecified organism
alba	A50.04	Early congenital syphilitic pneumonia
allergic	J82.89	Other pulmonary eosinophilia, not elsewhere classified
anaerobes	J15.8	Pneumonia due to other specified bacteria
anthrax	A22.1	Pulmonary anthrax
Ascaris	B77.81	Ascariasis pneumonia
aspiration	J69.0	Pneumonitis due to inhalation of food and vomit
atypical NEC	J18.9	Pneumonia, unspecified organism
bacillus	J15.9	Unspecified bacterial pneumonia
bacterial	J15.9	Unspecified bacterial pneumonia
Bacteroides	J15.8	Pneumonia due to other specified bacteria
bronchiolitis obliterans organized	J84.89	Other specified interstitial pulmonary diseases
broncho-, bronchial	J18.0	Bronchopneumonia, unspecified organism
Butyrivibrio	J15.8	Pneumonia due to other specified bacteria
Candida	B37.1	Pulmonary candidiasis
chlamydial	J16.0	Chlamydial pneumonia
cholesterol	J84.89	Other specified interstitial pulmonary diseases
Clostridium	J15.8	Pneumonia due to other specified bacteria
congenital	P23.9	Congenital pneumonia, unspecified
coronavirus2019	J12.82	Pneumonia due to coronavirus disease 2019
COVID-19	J12.82	Pneumonia due to coronavirus disease 2019
cryptogenic organizing	J84.116	Cryptogenic organizing pneumonia
cytomegalic inclusion	B25.0	Cytomegaloviral pneumonitis
cytomegaloviral	B25.0	Cytomegaloviral pneumonitis
desquamative interstitial	J84.117	Desquamative interstitial pneumonia
diplococcal, diplococcus	J13	Pneumonia due to Streptococcus pneumoniae
Eaton's agent	J15.7	Pneumonia due to Mycoplasma pneumoniae
Enterobacter	J15.69	Pneumonia due to other Gram-negative bacteria
eosinophilic	J82.81	Chronic eosinophilic pneumonia
Escherichia coli	J15.5	Pneumonia due to Escherichia coli
Eubacterium	J15.8	Pneumonia due to other specified bacteria
Friedländer's bacillus	J15.0	Pneumonia due to Klebsiella pneumoniae
Fusobacterium	J15.8	Pneumonia due to other specified bacteria
gangrenous	J85.0	Gangrene and necrosis of lung
giant cell	B05.2	Measles complicated by pneumonia
gonococcal	A54.84	Gonococcal pneumonia
gram-negative bacteria NEC	J15.69	Pneumonia due to other Gram-negative bacteria
Hemophilus influenzae	J14	Pneumonia due to Hemophilus influenzae
human metapneumovirus	J12.3	Human metapneumovirus pneumonia
hypostatic	J18.2	Hypostatic pneumonia, unspecified organism
interstitial	J84.9	Interstitial pulmonary disease, unspecified
Klebsiella	J15.0	Pneumonia due to Klebsiella pneumoniae
lipid, lipoid	J69.1	Pneumonitis due to inhalation of oils and essences
lobar	J18.1	Lobar pneumonia, unspecified organism
Löffler's	J82.89	Other pulmonary eosinophilia, not elsewhere classified
lymphoid interstitial	J84.2	Lymphoid interstitial pneumonia
meconium	P24.01	Meconium aspiration with respiratory symptoms
MRSA	J15.212	Pneumonia due to Methicillin resistant Staphylococcus aureus
MSSA	J15.211	Pneumonia due to Methicillin susceptible Staphylococcus aureus
Mycoplasma	J15.7	Pneumonia due to Mycoplasma pneumoniae
necrotic	J85.0	Gangrene and necrosis of lung
neonatal	P23.9	Congenital pneumonia, unspecified
nitrogen dioxide	J68.0	Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors
organizing	J84.89	Other specified interstitial pulmonary diseases
orthostatic	J18.2	Hypostatic pneumonia, unspecified organism
parainfluenza virus	J12.2	Parainfluenza virus pneumonia
passive	J18.2	Hypostatic pneumonia, unspecified organism
Peptococcus	J15.8	Pneumonia due to other specified bacteria
Peptostreptococcus	J15.8	Pneumonia due to other specified bacteria
plasma cell	B59	Pneumocystosis
pleuro-pneumonia-like organism	J15.7	Pneumonia due to Mycoplasma pneumoniae
pneumococcal	J13	Pneumonia due to Streptococcus pneumoniae
Pneumocystis	B59	Pneumocystosis
postinfectional NEC	B99	Other and unspecified infectious diseases	not billable
postmeasles	B05.2	Measles complicated by pneumonia
Proteus	J15.69	Pneumonia due to other Gram-negative bacteria
Pseudomonas	J15.1	Pneumonia due to Pseudomonas
psittacosis	A70	Chlamydia psittaci infections
radiation	J70.0	Acute pulmonary manifestations due to radiation
respiratory syncytial virus	J12.1	Respiratory syncytial virus pneumonia
resulting from a procedure	J95.89	Other postprocedural complications and disorders of respiratory system, not elsewhere classified
rheumatic	I00	Rheumatic fever without heart involvement
Salmonella	A02.22	Salmonella pneumonia
SARS-associated coronavirus	J12.81	Pneumonia due to SARS-associated coronavirus
SARS-CoV-2	J12.82	Pneumonia due to coronavirus disease 2019
Serratia marcescens	J15.69	Pneumonia due to other Gram-negative bacteria
specified NEC	J18.8	Other pneumonia, unspecified organism
spirochetal NEC	A69.8	Other specified spirochetal infections
staphylococcal	J15.20	Pneumonia due to staphylococcus, unspecified
static, stasis	J18.2	Hypostatic pneumonia, unspecified organism
streptococcal NEC	J15.4	Pneumonia due to other streptococci
Streptococcus pneumoniae	J13	Pneumonia due to Streptococcus pneumoniae
syphilitic, congenital	A50.04	Early congenital syphilitic pneumonia
traumatic	T79.8	Other early complications of trauma	not billable
tularemic	A21.2	Pulmonary tularemia
varicella	B01.2	Varicella pneumonia
Veillonella	J15.8	Pneumonia due to other specified bacteria
ventilator associated	J95.851	Ventilator associated pneumonia
viral, virus	J12.9	Viral pneumonia, unspecified
white	A50.04	Early congenital syphilitic pneumonia

Pneumonia with

lung abscess

J85.1

Abscess of lung with pneumonia

Pneumonia aspiration

newborn	P24.81	Other neonatal aspiration with respiratory symptoms
postprocedural	J95.4	Chemical pneumonitis due to anesthesia

Pneumonia bacillus

specified NEC

J15.8

Pneumonia due to other specified bacteria

Pneumonia bacterial

specified NEC

J15.8

Pneumonia due to other specified bacteria

Pneumonia broncho-, bronchial

allergic	J82.89	Other pulmonary eosinophilia, not elsewhere classified
bacterial	J15.9	Unspecified bacterial pneumonia
diplococcal	J13	Pneumonia due to Streptococcus pneumoniae
Eaton's agent	J15.7	Pneumonia due to Mycoplasma pneumoniae
Escherichia coli	J15.5	Pneumonia due to Escherichia coli
Friedländer's bacillus	J15.0	Pneumonia due to Klebsiella pneumoniae
Hemophilus influenzae	J14	Pneumonia due to Hemophilus influenzae
hypostatic	J18.2	Hypostatic pneumonia, unspecified organism
Klebsiella	J15.0	Pneumonia due to Klebsiella pneumoniae
lipid, lipoid	J69.1	Pneumonitis due to inhalation of oils and essences
Mycoplasma	J15.7	Pneumonia due to Mycoplasma pneumoniae
pleuro-pneumonia-like-organisms	J15.7	Pneumonia due to Mycoplasma pneumoniae
pneumococcal	J13	Pneumonia due to Streptococcus pneumoniae
Proteus	J15.69	Pneumonia due to other Gram-negative bacteria
Pseudomonas	J15.1	Pneumonia due to Pseudomonas
Serratia marcescens	J15.69	Pneumonia due to other Gram-negative bacteria
specified organism NEC	J16.8	Pneumonia due to other specified infectious organisms
streptococcal NEC	J15.4	Pneumonia due to other streptococci

Pneumonia chlamydial

congenital

P23.1

Congenital pneumonia due to Chlamydia

Pneumonia congenital

specified NEC

P23.8

Congenital pneumonia due to other organisms

Pneumonia eosinophilic

acute	J82.82	Acute eosinophilic pneumonia
chronic	J82.81	Chronic eosinophilic pneumonia

Pneumonia gram-negative bacteria NEC

anaerobic

J15.8

Pneumonia due to other specified bacteria

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources