ICD-10-CM Codes
A00-B99 Certain infectious and parasitic diseases
A30-A49 Other bacterial diseases
A43- Nocardiosis
2021 ICD-10-CM Diagnosis Code A43.0

2021 ICD-10-CM Diagnosis Code A43.0

Pulmonary nocardiosis

2016

2017

2018

2019

2020

2021

Billable/Specific Code

A43.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM A43.0 became effective on October 1, 2020.
This is the American ICD-10-CM version of A43.0 - other international versions of ICD-10 A43.0 may differ.

The following code(s) above A43.0 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 A43.0:

A00-B99
2021 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

ICD-10-CM A43.0 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

177 Respiratory infections and inflammations with mcc
178 Respiratory infections and inflammations with cc
179 Respiratory infections and inflammations without cc/mcc
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 A43.0 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
2021 (effective 10/1/2020): No change

Code annotations containing back-references to A43.0:

Type 1 Excludes: J17

ICD-10-CM Diagnosis Code J17
Pneumonia in diseases classified elsewhere
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)

Diagnosis Index entries containing back-references to A43.0:

Nocardiosis, nocardiasis A43.9
ICD-10-CM Diagnosis Code A43.9
Nocardiosis, unspecified
- lung A43.0
- pneumonia A43.0
- pulmonary A43.0
Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
ICD-10-CM Diagnosis Code J18.9
Pneumonia, unspecified organism
- in (due to)
  - nocardiosis, nocardiasis A43.0

ICD-10-CM Codes Adjacent To A43.0

A42.0 Pulmonary actinomycosis

A42.1 Abdominal actinomycosis

A42.2 Cervicofacial actinomycosis

A42.7 Actinomycotic sepsis

A42.8 Other forms of actinomycosis

A42.81 Actinomycotic meningitis

A42.82 Actinomycotic encephalitis

A42.89 Other forms of actinomycosis

A42.9 Actinomycosis, unspecified

A43 Nocardiosis

A43.0 Pulmonary nocardiosis

A43.1 Cutaneous nocardiosis

A43.8 Other forms of nocardiosis

A43.9 Nocardiosis, unspecified

A44 Bartonellosis

A44.0 Systemic bartonellosis

A44.1 Cutaneous and mucocutaneous bartonellosis

A44.8 Other forms of bartonellosis

A44.9 Bartonellosis, unspecified

A46 Erysipelas

A48 Other bacterial diseases, not elsewhere classified

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

2021 ICD-10-CM Diagnosis Code A43.0

Pulmonary nocardiosis

Certain infectious and parasitic diseases

Pneumonia in diseases classified elsewhere

Nocardiosis, unspecified

Pneumonia, unspecified organism