2020 ICD-10-CM Diagnosis Code B59

Pneumocystosis

    2016 2017 2018 2019 2020 Billable/Specific Code
  • B59 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM B59 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of B59 - other international versions of ICD-10 B59 may differ.
Applicable To
  • Pneumonia due to Pneumocystis carinii
  • Pneumonia due to Pneumocystis jiroveci
The following code(s) above B59 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to B59:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • B50-B64
    2020 ICD-10-CM Range B50-B64

    Protozoal diseases

    Type 1 Excludes
    • amebiasis (A06.-)
    • other protozoal intestinal diseases (A07.-)
    Protozoal diseases
Approximate Synonyms
  • Pneumocystis pneumonia
  • Pneumocystosis pneumonia
Clinical Information
  • A pulmonary disease in humans occurring in immunodeficient or malnourished patients or infants, characterized by dyspnea, tachypnea, and hypoxemia. Pneumocystis pneumonia is a frequently seen opportunistic infection in aids. It is caused by the fungus pneumocystis jirovecii. The disease is also found in other mammals where it is caused by related species of pneumocystis.
  • Pneumocystis carinii pneumonia (pcp). Pneumonia resulting from infection with pneumocystis carinii, frequently seen in the immunologically compromised, such as persons with aids, or steroid-treated individuals, the elderly, or premature or debilitated babies during their first three months. Patients may be only slightly febrile (or even afebrile), but are likely to be extremely weak, dyspneic, and cyanotic. This is a major cause of morbidity among patients with aids.
  • Pneumonia resulting from infection with pneumocystis carinii, frequently seen in the immunologically compromised, such as persons with aids, or steroid-treated individuals, the elderly, or premature or debilitated babies during their first three months. Patients may be only slightly febrile (or even afebrile), but are likely to be extremely weak, dyspneic, and cyanotic. This is a major cause of morbidity among patients with aids.
  • Pulmonary disease in humans occurring in immunodeficient or malnourished patients or infants, characterized by dyspnea, tachypnea, and hypoxemia; pneumocystis pneumonia is a frequent opportunistic infection in aids; also found in other mammals where it is caused by related species of pneumocystis.
ICD-10-CM B59 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 177 Respiratory infections and inflammations with mcc
  • 178 Respiratory infections and inflammations with cc
  • 179 Respiratory infections and inflammations without cc/mcc
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems
  • 974 Hiv with major related condition with mcc
  • 975 Hiv with major related condition with cc
  • 976 Hiv with major related condition without cc/mcc

Convert B59 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to B59:
  • Code First: J93.12
    ICD-10-CM Diagnosis Code J93.12

    Secondary spontaneous pneumothorax

      2016 2017 2018 2019 2020 Billable/Specific Code
    Code First
    • underlying condition, such as:
    • catamenial pneumothorax due to endometriosis (N80.8)
    • cystic fibrosis (E84.-)
    • eosinophilic pneumonia (J82)
    • lymphangioleiomyomatosis (J84.81)
    • malignant neoplasm of bronchus and lung (C34.-)
    • Marfan's syndrome (Q87.4)
    • pneumonia due to Pneumocystis carinii (B59)
    • secondary malignant neoplasm of lung (C78.0-)
    • spontaneous rupture of the esophagus (K22.3)
  • Type 1 Excludes: J16
    , J17
    , J17
    , J17
    , J84.11
    , J84.114
    ICD-10-CM Diagnosis Code J16

    Pneumonia due to other infectious organisms, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code First
    Code Also
    • associated abscess, if applicable (J85.1)
    Type 1 Excludes
    • congenital pneumonia (P23.-)
    • ornithosis (A70)
    • pneumocystosis (B59)
    • pneumonia NOS (J18.9)
    ICD-10-CM Diagnosis Code J17

    Pneumonia in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • Q fever (A78)
    • rheumatic fever (I00)
    • schistosomiasis (B65.0-B65.9)
    Type 1 Excludes
    • candidial pneumonia (B37.1)
    • chlamydial pneumonia (J16.0)
    • gonorrheal pneumonia (A54.84)
    • histoplasmosis pneumonia (B39.0-B39.2)
    • measles pneumonia (B05.2)
    • nocardiosis pneumonia (A43.0)
    • pneumocystosis (B59)
    • pneumonia due to Pneumocystis carinii (B59)
    • pneumonia due to Pneumocystis jiroveci (B59)
    • pneumonia in actinomycosis (A42.0)
    • pneumonia in anthrax (A22.1)
    • pneumonia in ascariasis (B77.81)
    • pneumonia in aspergillosis (B44.0-B44.1)
    • pneumonia in coccidioidomycosis (B38.0-B38.2)
    • pneumonia in cytomegalovirus disease (B25.0)
    • pneumonia in toxoplasmosis (B58.3)
    • rubella pneumonia (B06.81)
    • salmonella pneumonia (A02.22)
    • spirochetal infection NEC with pneumonia (A69.8)
    • tularemia pneumonia (A21.2)
    • typhoid fever with pneumonia (A01.03)
    • varicella pneumonia (B01.2)
    • whooping cough with pneumonia (A37 with fifth-character 1)
    ICD-10-CM Diagnosis Code J17

    Pneumonia in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • Q fever (A78)
    • rheumatic fever (I00)
    • schistosomiasis (B65.0-B65.9)
    Type 1 Excludes
    • candidial pneumonia (B37.1)
    • chlamydial pneumonia (J16.0)
    • gonorrheal pneumonia (A54.84)
    • histoplasmosis pneumonia (B39.0-B39.2)
    • measles pneumonia (B05.2)
    • nocardiosis pneumonia (A43.0)
    • pneumocystosis (B59)
    • pneumonia due to Pneumocystis carinii (B59)
    • pneumonia due to Pneumocystis jiroveci (B59)
    • pneumonia in actinomycosis (A42.0)
    • pneumonia in anthrax (A22.1)
    • pneumonia in ascariasis (B77.81)
    • pneumonia in aspergillosis (B44.0-B44.1)
    • pneumonia in coccidioidomycosis (B38.0-B38.2)
    • pneumonia in cytomegalovirus disease (B25.0)
    • pneumonia in toxoplasmosis (B58.3)
    • rubella pneumonia (B06.81)
    • salmonella pneumonia (A02.22)
    • spirochetal infection NEC with pneumonia (A69.8)
    • tularemia pneumonia (A21.2)
    • typhoid fever with pneumonia (A01.03)
    • varicella pneumonia (B01.2)
    • whooping cough with pneumonia (A37 with fifth-character 1)
    ICD-10-CM Diagnosis Code J17

    Pneumonia in diseases classified elsewhere

      2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
    Code First
    • underlying disease, such as:
    • Q fever (A78)
    • rheumatic fever (I00)
    • schistosomiasis (B65.0-B65.9)
    Type 1 Excludes
    • candidial pneumonia (B37.1)
    • chlamydial pneumonia (J16.0)
    • gonorrheal pneumonia (A54.84)
    • histoplasmosis pneumonia (B39.0-B39.2)
    • measles pneumonia (B05.2)
    • nocardiosis pneumonia (A43.0)
    • pneumocystosis (B59)
    • pneumonia due to Pneumocystis carinii (B59)
    • pneumonia due to Pneumocystis jiroveci (B59)
    • pneumonia in actinomycosis (A42.0)
    • pneumonia in anthrax (A22.1)
    • pneumonia in ascariasis (B77.81)
    • pneumonia in aspergillosis (B44.0-B44.1)
    • pneumonia in coccidioidomycosis (B38.0-B38.2)
    • pneumonia in cytomegalovirus disease (B25.0)
    • pneumonia in toxoplasmosis (B58.3)
    • rubella pneumonia (B06.81)
    • salmonella pneumonia (A02.22)
    • spirochetal infection NEC with pneumonia (A69.8)
    • tularemia pneumonia (A21.2)
    • typhoid fever with pneumonia (A01.03)
    • varicella pneumonia (B01.2)
    • whooping cough with pneumonia (A37 with fifth-character 1)
    ICD-10-CM Diagnosis Code J84.11

    Idiopathic interstitial pneumonia

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • lymphoid interstitial pneumonia (J84.2)
    • pneumocystis pneumonia (B59)
    ICD-10-CM Diagnosis Code J84.114

    Acute interstitial pneumonitis

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Hamman-Rich syndrome
    Type 1 Excludes
    • pneumocystis pneumonia (B59)

Diagnosis Index entries containing back-references to B59:
  • Disease, diseased - see also Syndrome
    • protozoal B64
      ICD-10-CM Diagnosis Code B64

      Unspecified protozoal disease

        2016 2017 2018 2019 2020 Billable/Specific Code
      • pneumocystosis B59
  • Infection, infected, infective (opportunistic) B99.9
    ICD-10-CM Diagnosis Code B99.9

    Unspecified infectious disease

      2016 2017 2018 2019 2020 Billable/Specific Code
    • Pneumocystis carinii B59 (pneumonia)
    • Pneumocystis jiroveci B59 (pneumonia)
  • Pneumocystis carinii pneumonia B59
  • Pneumocystis jiroveci B59 (pneumonia)
  • Pneumocystosis B59 (with pneumonia)
  • Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
    ICD-10-CM Diagnosis Code J18.9

    Pneumonia, unspecified organism

      2016 2017 2018 2019 2020 Billable/Specific Code
    • in (due to)
      • pneumocystosis B59 (Pneumocystis carinii) (Pneumocystis jiroveci)
    • interstitial J84.9
      ICD-10-CM Diagnosis Code J84.9

      Interstitial pulmonary disease, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      Applicable To
      • Interstitial pneumonia NOS
      • plasma cell B59
    • plasma cell B59 (of infants)
    • Pneumocystis B59 (carinii) (jiroveci)

ICD-10-CM Codes Adjacent To B59
B58.09 Other toxoplasma oculopathy
B58.1 Toxoplasma hepatitis
B58.2 Toxoplasma meningoencephalitis
B58.3 Pulmonary toxoplasmosis
B58.8 Toxoplasmosis with other organ involvement
B58.81 Toxoplasma myocarditis
B58.82 Toxoplasma myositis
B58.83 Toxoplasma tubulo-interstitial nephropathy
B58.89 Toxoplasmosis with other organ involvement
B58.9 Toxoplasmosis, unspecified
B59 Pneumocystosis
B60 Other protozoal diseases, not elsewhere classified
B60.0 Babesiosis
B60.1 Acanthamebiasis
B60.10 …… unspecified
B60.11 Meningoencephalitis due to Acanthamoeba (culbertsoni)
B60.12 Conjunctivitis due to Acanthamoeba
B60.13 Keratoconjunctivitis due to Acanthamoeba
B60.19 Other acanthamebic disease
B60.2 Naegleriasis
B60.8 Other specified protozoal diseases

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.