Index to Diseases entry: Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
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| Documentation | Code | Code description or cross-reference |
|---|---|---|
| with | — | |
| lung abscess | J85.1 | Abscess of lung with pneumonia |
| influenza | — | see Influenza, with, pneumonia |
| 2019(novel) coronavirus | 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 |
| alveolar | — | see Pneumonia, lobar |
| anaerobes | J15.8 | Pneumonia due to other specified bacteria |
| anthrax | A22.1 | Pulmonary anthrax |
| apex, apical | — | see Pneumonia, lobar |
| Ascaris | B77.81 | Ascariasis pneumonia |
| aspiration | J69.0 | Pneumonitis due to inhalation of food and vomit |
| due to | — | |
| newborn | P24.81 | Other neonatal aspiration with respiratory symptoms |
| postprocedural | J95.4 | Chemical pneumonitis due to anesthesia |
| atypical NEC | J18.9 | Pneumonia, unspecified organism |
| bacillus | J15.9 | Unspecified bacterial pneumonia |
| specified NEC | J15.8 | Pneumonia due to other specified bacteria |
| bacterial | J15.9 | Unspecified bacterial pneumonia |
| specified NEC | J15.8 | Pneumonia due to other specified bacteria |
| Bacteroides(fragilis) (oralis) (melaninogenicus) | J15.8 | Pneumonia due to other specified bacteria |
| basal, basic, basilar | — | see Pneumonia, by type |
| bronchiolitis obliterans organized(BOOP) | J84.89 | Other specified interstitial pulmonary diseases |
| broncho-, bronchial(confluent) (croupous) (diffuse) (disseminated) (hemorrhagic) (involving lobes) (lobar) (terminal) | J18.0 | Bronchopneumonia, unspecified organism |
| allergic | J82.89 | Other pulmonary eosinophilia, not elsewhere classified |
| aspiration | — | see Pneumonia, aspiration |
| bacterial | J15.9 | Unspecified bacterial pneumonia |
| chronic | — | see Fibrosis, lung |
| diplococcal | J13 | Pneumonia due to Streptococcus pneumoniae |
| Eaton's agent | J15.7 | Pneumonia due to Mycoplasma pneumoniae |
| Escherichia coli(E. 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 |
| inhalation | — | see also Pneumonia, aspiration |
| Klebsiella(pneumoniae) | J15.0 | Pneumonia due to Klebsiella pneumoniae |
| lipid, lipoid | J69.1 | Pneumonitis due to inhalation of oils and essences |
| Mycoplasma(pneumoniae) | J15.7 | Pneumonia due to Mycoplasma pneumoniae |
| pleuro-pneumonia-like-organisms(PPLO) | 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 |
| staphylococcal | — | see Pneumonia, staphylococcal |
| streptococcal NEC | J15.4 | Pneumonia due to other streptococci |
| viral, virus | — | see Pneumonia, viral |
| Butyrivibrio(fibriosolvens) | J15.8 | Pneumonia due to other specified bacteria |
| Candida | B37.1 | Pulmonary candidiasis |
| caseous | — | see Tuberculosis, pulmonary |
| catarrhal | — | see Pneumonia, broncho |
| chlamydial | J16.0 | Chlamydial pneumonia |
| congenital | P23.1 | Congenital pneumonia due to Chlamydia |
| cholesterol | J84.89 | Other specified interstitial pulmonary diseases |
| cirrhotic(chronic) | — | see Fibrosis, lung |
| Clostridium(haemolyticum) (novyi) | J15.8 | Pneumonia due to other specified bacteria |
| confluent | — | see Pneumonia, broncho |
| congenital(infective) | P23.9 | Congenital pneumonia, unspecified |
| due to | — | |
| specified NEC | P23.8 | Congenital pneumonia due to other organisms |
| coronavirus(novel) (disease) 2019 | J12.82 | Pneumonia due to coronavirus disease 2019 |
| COVID-19 | J12.82 | Pneumonia due to coronavirus disease 2019 |
| croupous | — | see Pneumonia, lobar |
| cryptogenic organizing | J84.116 | Cryptogenic organizing pneumonia |
| cytomegalic inclusion | B25.0 | Cytomegaloviral pneumonitis |
| cytomegaloviral | B25.0 | Cytomegaloviral pneumonitis |
| deglutition | — | see Pneumonia, aspiration |
| desquamative interstitial | J84.117 | Desquamative interstitial pneumonia |
| diffuse | — | see Pneumonia, broncho |
| diplococcal, diplococcus(broncho-) (lobar) | J13 | Pneumonia due to Streptococcus pneumoniae |
| disseminated(focal) | — | see Pneumonia, broncho |
| Eaton's agent | J15.7 | Pneumonia due to Mycoplasma pneumoniae |
| embolic, embolism | — | see Embolism, pulmonary |
| Enterobacter | J15.69 | Pneumonia due to other Gram-negative bacteria |
| eosinophilic | J82.81 | Chronic eosinophilic pneumonia |
| acute | J82.82 | Acute eosinophilic pneumonia |
| chronic | J82.81 | Chronic eosinophilic pneumonia |
| Escherichia coli(E. coli) | J15.5 | Pneumonia due to Escherichia coli |
| Eubacterium | J15.8 | Pneumonia due to other specified bacteria |
| fibrinous | — | see Pneumonia, lobar |
| fibroid, fibrous(chronic) | — | see Fibrosis, lung |
| Friedländer's bacillus | J15.0 | Pneumonia due to Klebsiella pneumoniae |
| Fusobacterium(nucleatum) | J15.8 | Pneumonia due to other specified bacteria |
| gangrenous | J85.0 | Gangrene and necrosis of lung |
| giant cell(measles) | B05.2 | Measles complicated by pneumonia |
| gonococcal | A54.84 | Gonococcal pneumonia |
| gram-negative bacteria NEC | J15.69 | Pneumonia due to other Gram-negative bacteria |
| anaerobic | J15.8 | Pneumonia due to other specified bacteria |
| Hemophilus influenzae(broncho) (lobar) | J14 | Pneumonia due to Hemophilus influenzae |
| human metapneumovirus | J12.3 | Human metapneumovirus pneumonia |
| hypostatic(broncho) (lobar) | J18.2 | Hypostatic pneumonia, unspecified organism |
| in(due to) | — | |
| Acinetobacter baumannii | J15.61 | Pneumonia due to Acinetobacter baumannii |
| actinomycosis | A42.0 | Pulmonary actinomycosis |
| adenovirus | J12.0 | Adenoviral pneumonia |
| anthrax | A22.1 | Pulmonary anthrax |
| ascariasis | B77.81 | Ascariasis pneumonia |
| aspergillosis | B44.9 | Aspergillosis, unspecified |
| Bacillus anthracis | A22.1 | Pulmonary anthrax |
| Bacterium anitratum | J15.69 | Pneumonia due to other Gram-negative bacteria |
| candidiasis | B37.1 | Pulmonary candidiasis |
| chickenpox | B01.2 | Varicella pneumonia |
| Chlamydia | J16.0 | Chlamydial pneumonia |
| coccidioidomycosis | B38.2 | Pulmonary coccidioidomycosis, unspecified |
| cytomegalovirus disease | B25.0 | Cytomegaloviral pneumonitis |
| Diplococcus(pneumoniae) | 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 |
| Escherichia coli(E. coli) | J15.5 | Pneumonia due to Escherichia coli |
| Friedländer's bacillus | J15.0 | Pneumonia due to Klebsiella pneumoniae |
| fumes and vapors(chemical) (inhalation) | J68.0 | Bronchitis and pneumonitis due to chemicals, gases, fumes and vapors |
| gonorrhea | A54.84 | Gonococcal pneumonia |
| Hemophilus influenzae(H. influenzae) | J14 | Pneumonia due to Hemophilus influenzae |
| Herellea | J15.69 | Pneumonia due to other Gram-negative bacteria |
| histoplasmosis | B39.2 | Pulmonary histoplasmosis capsulati, unspecified |
| human metapneumovirus | J12.3 | Human metapneumovirus pneumonia |
| Klebsiella(pneumoniae) | J15.0 | Pneumonia due to Klebsiella pneumoniae |
| measles | B05.2 | Measles complicated by pneumonia |
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Frequently asked questions
What is the ICD-10 code for pneumonia?
J18.9 (Pneumonia, unspecified organism) is the code the index assigns to "Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)" with no further detail. Confirm it in the tabular list before reporting it, because the tabular notes can require a different or additional code.
Which documentation changes the code for pneumonia?
The index lists 95 subterms with their own codes, including with lung abscess (J85.1); 2019(novel) coronavirus (J12.82); adenoviral (J12.0); adynamic (J18.2); alba (A50.04).
Sources
Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.
- ICD-10-CM FY2027 tabular order file (category titles)Version FY2027 · effective 2026-10-01 · file icd10cm_order_2027.txtSHA-256 38981fb2c1226e2b…
- ICD-10-CM FY2027 tabular list (chapter titles and ranges)Version FY2027 · effective 2026-10-01 · file 2027-code-tables-tabular-index.zipSHA-256 37baa476323714be…
- ICD-10-CM FY2027 code descriptions addenda (codes added, deleted and revised)Version FY2027 · effective 2026-10-01 · file icd10cm_codes_addenda_2027.txtSHA-256 cfba025073235af4…
Disclaimer
The entry, subterms and codes are reproduced from the FY2027 ICD-10-CM index; code descriptions are from the FY2027 code files. Code from the medical record using both the index and the tabular list, under the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.
Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.