ICD-10-CM Alphabetic Index · FY 2027 326 Entries
Pneumonia in the ICD-10-CM Index ICD-10-CM
The main term Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) carries 326 index entries pointing to 103 ICD-10-CM codes. The default entry is J18.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2027 index fileEffective Oct 1, 2026 – Sep 30, 2027
326
Index Entries
103
Codes Referenced
J18.9
Default Code
P
Letter
326 of 326 shown
ICD-10-CM
Index Entries Under Pneumonia 326 entries · 103 codes
Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
with
lung abscess J85.1
due to specified organism see Pneumonia, in (due to)
influenza see Influenza, with, pneumonia
adenoviral J12.0
adynamic J18.2
alba A50.04
allergic J82.89 see also Pneumonitis, hypersensitivity
alveolar see Pneumonia, lobar
anaerobes J15.8
anthrax A22.1
apex, apical see Pneumonia, lobar
Ascaris B77.81
aspiration J69.0
due to
aspiration of microorganisms
bacterial J15.9
viral J12.9
food (regurgitated) J69.0
gastric secretions J69.0
milk (regurgitated) J69.0
oils, essences J69.1
solids, liquids NEC J69.8
vomitus J69.0
newborn P24.81
amniotic fluid (clear) P24.11
blood P24.21
liquor (amnii) P24.11
meconium P24.01
milk P24.31
mucus P24.11
food (regurgitated) P24.31
specified NEC P24.81
stomach contents P24.31
postprocedural J95.4
atypical NEC J18.9
bacillus J15.9
specified NEC J15.8
bacterial J15.9
specified NEC J15.8
Bacteroides (fragilis) (oralis) (melaninogenicus) J15.8
basal, basic, basilar see Pneumonia, by type
bronchiolitis obliterans organized (BOOP) J84.89
broncho-, bronchial (confluent) (croupous) (diffuse) (disseminated) (hemorrhagic) (involving lobes) (lobar) (terminal) J18.0
allergic J82.89 see also Pneumonitis, hypersensitivity
aspiration see Pneumonia, aspiration
bacterial J15.9
specified NEC J15.8
chronic see Fibrosis, lung
diplococcal J13
Eaton's agent J15.7
Escherichia coli (E. coli) J15.5
Friedländer's bacillus J15.0
Hemophilus influenzae J14
hypostatic J18.2
inhalation see also Pneumonia, aspiration
due to fumes or vapors (chemical) J68.0
of oils or essences J69.1
Klebsiella (pneumoniae) J15.0
lipid, lipoid J69.1
endogenous J84.89
Mycoplasma (pneumoniae) J15.7
pleuro-pneumonia-like-organisms (PPLO) J15.7
pneumococcal J13
Proteus J15.69
Pseudomonas J15.1
Serratia marcescens J15.69
specified organism NEC J16.8
staphylococcal see Pneumonia, staphylococcal
streptococcal NEC J15.4
group B J15.3
pneumoniae J13
viral, virus see Pneumonia, viral
Butyrivibrio (fibriosolvens) J15.8
Candida B37.1
caseous see Tuberculosis, pulmonary
catarrhal see Pneumonia, broncho
chlamydial J16.0
congenital P23.1
cholesterol J84.89
cirrhotic (chronic) see Fibrosis, lung
Clostridium (haemolyticum) (novyi) J15.8
confluent see Pneumonia, broncho
congenital (infective) P23.9
due to
bacterium NEC P23.6
Chlamydia P23.1
Escherichia coli P23.4
Haemophilus influenzae P23.6
infective organism NEC P23.8
Klebsiella pneumoniae P23.6
Mycoplasma P23.6
Pseudomonas P23.5
Staphylococcus P23.2
Streptococcus (except group B) P23.6
group B P23.3
viral agent P23.0
specified NEC P23.8
COVID-19 J12.82
croupous see Pneumonia, lobar
cryptogenic organizing J84.116
cytomegalic inclusion B25.0
cytomegaloviral B25.0
deglutition see Pneumonia, aspiration
desquamative interstitial J84.117
diffuse see Pneumonia, broncho
diplococcal, diplococcus (broncho-) (lobar) J13
disseminated (focal) see Pneumonia, broncho
Eaton's agent J15.7
embolic, embolism see Embolism, pulmonary
Enterobacter J15.69
eosinophilic J82.81
acute J82.82
chronic J82.81
Escherichia coli (E. coli) J15.5
Eubacterium J15.8
fibrinous see Pneumonia, lobar
fibroid, fibrous (chronic) see Fibrosis, lung
Friedländer's bacillus J15.0
Fusobacterium (nucleatum) J15.8
gangrenous J85.0
giant cell (measles) B05.2
gonococcal A54.84
gram-negative bacteria NEC J15.69
anaerobic J15.8
Hemophilus influenzae (broncho) (lobar) J14
human metapneumovirus J12.3
hypostatic (broncho) (lobar) J18.2
in (due to)
Acinetobacter baumannii J15.61
actinomycosis A42.0
adenovirus J12.0
anthrax A22.1
ascariasis B77.81
aspergillosis B44.9
Bacillus anthracis A22.1
Bacterium anitratum J15.69
candidiasis B37.1
chickenpox B01.2
Chlamydia J16.0
neonatal P23.1
coccidioidomycosis B38.2
acute B38.0
chronic B38.1
cytomegalovirus disease B25.0
Diplococcus (pneumoniae) J13
Eaton's agent J15.7
Enterobacter J15.69
Escherichia coli (E. coli) J15.5
Friedländer's bacillus J15.0
fumes and vapors (chemical) (inhalation) J68.0
gonorrhea A54.84
Hemophilus influenzae (H. influenzae) J14
Herellea J15.69
histoplasmosis B39.2
acute B39.0
chronic B39.1
human metapneumovirus J12.3
Klebsiella (pneumoniae) J15.0
measles B05.2
Mycoplasma (pneumoniae) J15.7
nocardiosis, nocardiasis A43.0
ornithosis A70
parainfluenza virus J12.2
pleuro-pneumonia-like-organism (PPLO) J15.7
pneumococcus J13
pneumocystosis (Pneumocystis carinii) (Pneumocystis jirovecii) B59
Proteus J15.69
Pseudomonas NEC J15.1
pseudomallei A24.1
psittacosis A70
Q fever A78
respiratory syncytial virus (RSV) J12.1
rubella B06.81
Salmonella (infection) A02.22
typhi A01.03
Serratia marcescens J15.69
specified
bacterium NEC J15.8
organism NEC J16.8
spirochetal NEC A69.8
Staphylococcus J15.20
aureus (methicillin susceptible) (MSSA) J15.211
methicillin resistant (MRSA) J15.212
specified NEC J15.29
Streptococcus J15.4
group B J15.3
pneumoniae J13
specified NEC J15.4
toxoplasmosis B58.3
tularemia A21.2
typhoid (fever) A01.03
varicella B01.2
virus see Pneumonia, viral
whooping cough A37.91
due to
Bordetella parapertussis A37.11
Bordetella pertussis A37.01
specified NEC A37.81
Yersinia pestis A20.2
inhalation of food or vomit see Pneumonia, aspiration
interstitial J84.9
chronic J84.111
desquamative J84.117
due to
collagen vascular disease J84.178
known underlying cause J84.178
idiopathic NOS J84.111
in disease classified elsewhere J84.178
lymphocytic (due to collagen vascular disease) (in diseases classified elsewhere) J84.178
lymphoid J84.2
non-specific J84.89
due to
collagen vascular disease J84.178
known underlying cause J84.178
idiopathic J84.113
in diseases classified elsewhere J84.178
plasma cell B59
pseudomonas J15.1
usual J84.112
due to collagen vascular disease J84.178
idiopathic J84.112
in diseases classified elsewhere J84.178
Klebsiella (pneumoniae) J15.0
lipid, lipoid (exogenous) J69.1
endogenous J84.89
lobar (disseminated) (double) (interstitial) J18.1
bacterial J15.9
specified NEC J15.8
chronic see Fibrosis, lung
Escherichia coli (E. coli) J15.5
Friedländer's bacillus J15.0
Hemophilus influenzae J14
hypostatic J18.2
Klebsiella (pneumoniae) J15.0
pneumococcal J13
Proteus J15.69
Pseudomonas J15.1
specified organism NEC J16.8
staphylococcal see Pneumonia, staphylococcal
streptococcal NEC J15.4
Streptococcus pneumoniae J13
viral, virus see Pneumonia, viral
lobular see Pneumonia, broncho
Löffler's J82.89
lymphoid interstitial J84.2
massive see Pneumonia, lobar
meconium P24.01
MRSA (Methicillin resistant Staphylococcus aureus) J15.212
MSSA (methicillin susceptible Staphylococcus aureus) J15.211
multilobar see Pneumonia, by type
Mycoplasma (pneumoniae) J15.7
necrotic J85.0
neonatal P23.9
aspiration see Aspiration, by substance, with pneumonia
nitrogen dioxide J68.0
organizing J84.89
due to
collagen vascular disease J84.178
known underlying cause J84.178
in diseases classified elsewhere J84.178
orthostatic J18.2
parainfluenza virus J12.2
parenchymatous see Fibrosis, lung
passive J18.2
patchy see Pneumonia, broncho
Peptococcus J15.8
Peptostreptococcus J15.8
plasma cell (of infants) B59
pleurolobar see Pneumonia, lobar
pleuro-pneumonia-like organism (PPLO) J15.7
pneumococcal (broncho) (lobar) J13
Pneumocystis (carinii) (jirovecii) B59
postmeasles B05.2
Proteus J15.69
Pseudomonas J15.1
psittacosis A70
radiation J70.0
respiratory syncytial virus (RSV) J12.1
resulting from a procedure J95.89
Salmonella (arizonae) (cholerae-suis) (enteritidis) (typhimurium) A02.22
typhi A01.03
typhoid fever A01.03
SARS-CoV-2 J12.82
segmented, segmental see Pneumonia, broncho-
Serratia marcescens J15.69
specified NEC J18.8
bacterium NEC J15.8
organism NEC J16.8
virus NEC J12.89
spirochetal NEC A69.8
staphylococcal (broncho) (lobar) J15.20
aureus (methicillin susceptible) (MSSA) J15.211
methicillin resistant (MRSA) J15.212
specified NEC J15.29
static, stasis J18.2
streptococcal NEC (broncho) (lobar) J15.4
group
A J15.4
B J15.3
specified NEC J15.4
Streptococcus pneumoniae J13
syphilitic, congenital (early) A50.04
traumatic (complication) (early) (secondary) T79.8 Non-billable
tuberculous (any) see Tuberculosis, pulmonary
tularemic A21.2
varicella B01.2
Veillonella J15.8
ventilator associated J95.851
viral, virus (broncho) (interstitial) (lobar) J12.9
adenoviral J12.0
congenital P23.0
human metapneumovirus J12.3
parainfluenza J12.2
respiratory syncytial (RSV) J12.1
specified NEC J12.89
white (congenital) A50.04
The info icon previews the code's description and billable status; the code link opens its full page with all notations.
Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2027 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2026 through September 30, 2027.
