Version 2024

2024 ICD-10-CM Diagnosis Code A31.8

Other mycobacterial infections

ICD-10-CM Code:: A31.8
ICD-10 Code for:: Other mycobacterial infections
Is Billable?: Yes - Valid for Submission
Chronic Condition Indicator: ^[1]: Not chronic
Code Navigator:

Code Information
Approximate Synonyms
Clinical Classification
Clinical Information
Tabular List of Diseases and Injuries
Index to Diseases and Injuries References
Diagnostic Related Groups Mapping
Convert to ICD-9 Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Certain infectious and parasitic diseases
(A00–B99)
- Other bacterial diseases
  (A30-A49)
  - Infection due to other mycobacteria
    (A31)

A31.8 is a billable diagnosis code used to specify a medical diagnosis of other mycobacterial infections. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Abscess of spinal subdural space caused by bacterium
Abscess of spinal subdural space caused by Mycobacterium
Atypical mycobacterial lymphadenitis
Bacterial arthritis of sacroiliac joint
Bacterial arthritis of vertebral column
Bacterial arthritis of vertebral column
Bacterial duodenitis
Bacterial duodenitis
Bacterial esophagitis
Bacterial esophagitis
Bacterial spondyloarthritis
Bacterial tenosynovitis
Bursitis caused by bacterial infection
Cervical atypical mycobacterial lymphadenitis
Cervical lymphadenitis
Disseminated atypical mycobacterial infection
Disseminated atypical mycobacterial infection
Disseminated atypical mycobacterial infection
Disseminated atypical mycobacterial infection
Disseminated atypical mycobacterial infection
Disseminated atypical mycobacterial infection
Disseminated Mycobacterium chelonei infection
Disseminated Mycobacterium fortuitum infection
Disseminated Mycobacterium gordonae infection
Disseminated Mycobacteroides abscessus infection
Encephalomyelitis caused by bacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Gastrointestinal infection caused by non-tuberculous Mycobacterium
Granuloma of spinal epidural space caused by bacterium
Granuloma of spinal epidural space caused by Mycobacterium
Granuloma of spinal subdural space caused by bacterium
Granuloma of spinal subdural space caused by Mycobacterium
Infection caused by Mycobacterium mageritense
Infection causing encephalomyelitis
Infection causing granuloma of extradural space of spinal cord
Infection due to Mycobacterium africanum
Infection due to Mycobacterium agri
Infection due to Mycobacterium aichiense
Infection due to Mycobacterium alvei
Infection due to Mycobacterium asiaticum
Infection due to Mycobacterium aurum
Infection due to Mycobacterium austroafricanum
Infection due to Mycobacterium avium
Infection due to Mycobacterium avium brunese
Infection due to Mycobacterium borstelense
Infection due to Mycobacterium bovis
Infection due to Mycobacterium branderi
Infection due to Mycobacterium brumae
Infection due to Mycobacterium celatum
Infection due to Mycobacterium chelonei
Infection due to Mycobacterium chitae
Infection due to Mycobacterium chubuense
Infection due to Mycobacterium confluentis
Infection due to Mycobacterium conspicuum
Infection due to Mycobacterium cookii
Infection due to Mycobacterium diernhoferi
Infection due to Mycobacterium duvalii
Infection due to Mycobacterium fallax
Infection due to Mycobacterium farcinogenes
Infection due to Mycobacterium flavescens
Infection due to Mycobacterium fortuitum
Infection due to Mycobacterium gadium
Infection due to Mycobacterium gastri
Infection due to Mycobacterium genavense
Infection due to Mycobacterium gilvum
Infection due to Mycobacterium goodii
Infection due to Mycobacterium gordonae
Infection due to Mycobacterium haemophilum
Infection due to Mycobacterium hassiacum
Infection due to Mycobacterium hiberniae
Infection due to Mycobacterium hodleri
Infection due to Mycobacterium interjectum
Infection due to Mycobacterium intermedium
Infection due to Mycobacterium intracellulare
Infection due to Mycobacterium komossence
Infection due to Mycobacterium lentiflavum
Infection due to Mycobacterium lepraemurium
Infection due to Mycobacterium madagascariense
Infection due to Mycobacterium malmoense
Infection due to Mycobacterium microti
Infection due to Mycobacterium moriokaense
Infection due to Mycobacterium mucogenicum
Infection due to Mycobacterium neoaurum
Infection due to Mycobacterium nonchromogenicum
Infection due to Mycobacterium novocastrense
Infection due to Mycobacterium obuense
Infection due to Mycobacterium parafortuitum
Infection due to Mycobacterium paratuberculosis
Infection due to Mycobacterium peregrinum
Infection due to Mycobacterium phlei
Infection due to Mycobacterium piscium
Infection due to Mycobacterium porcinum
Infection due to Mycobacterium poriferae
Infection due to Mycobacterium pulveris
Infection due to Mycobacterium rhodesiae
Infection due to Mycobacterium scrofulaceum
Infection due to Mycobacterium senegalense
Infection due to Mycobacterium shimoidei
Infection due to Mycobacterium simiae
Infection due to Mycobacterium smegmatis
Infection due to Mycobacterium sphagni
Infection due to Mycobacterium szulgai
Infection due to Mycobacterium terrae
Infection due to Mycobacterium thamnophis
Infection due to Mycobacterium thermoresistibile
Infection due to Mycobacterium tokaiense
Infection due to Mycobacterium triplex
Infection due to Mycobacterium triviale
Infection due to Mycobacterium vaccae
Infection due to Mycobacterium wolinskyi
Infection due to Mycobacterium xenopi
Infection due to Mycobacteroides abscessus
Infection of intervertebral disc caused by bacterium
Mycobacterial arthritis
Mycobacterial bursitis
Mycobacterial colitis
Mycobacterial discitis
Mycobacterial duodenitis
Mycobacterial encephalomyelitis
Mycobacterial enteritis of intestine
Mycobacterial enteritis of small intestine
Mycobacterial enteritis of small intestine
Mycobacterial enteritis of small intestine
Mycobacterial esophagitis
Mycobacterial gastritis
Mycobacterial gastritis
Mycobacterial lymphadenitis
Mycobacterial myositis
Mycobacterial spondyloarthritis
Mycobacterial tenosynovitis
Mycobacterium avium intracellulare group choroiditis
Mycobacterium avium intracellulare, localized
Mycobacterium avium-intracellulare gastritis
Mycobacterium fortuitum or Mycobacterium peregrinum
Mycobacterium senegalense or Mycobacterium conceptionense
Mycobacterium tuberculosis or Mycobacterium canettii
Mycobacterium xenopi or Mycobacterium celatum
Myelitis caused by bacterium
Non-tuberculous mycobacterial colitis
Non-tuberculous mycobacterial duodenitis
Non-tuberculous mycobacterial enteritis of intestine
Non-tuberculous mycobacterial enteritis of intestine
Non-tuberculous mycobacterial enteritis of small intestine
Non-tuberculous mycobacterial enteritis of small intestine
Non-tuberculous mycobacterial esophagitis
Non-tuberculous mycobacterial gastritis
Subdural abscess

Clinical Classification

Clinical Category is Bacterial infections
CCSR Category Code: INF003
Inpatient Default CCSR: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

Bacterial Esophagitis
an acute bacterial infection that affects the esophagus. symptoms include severe pain on swallowing and retrosternal pain. endoscopic examination reveals esophageal mucosal ulcerations and pseudomembranous formations.
Cervical Lymphadenitis
inflammation of the cervical lymph nodes.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

- Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) - M19.90
- - due to or associated with
  - - mycobacteria - See Also: category M01; - A31.8

- Lymphadenitis - I88.9
- - mycobacterial - A31.8

- Mycobacterium, mycobacterial (infection) - A31.9
- - atypical - A31.9
  - - specified site NEC - A31.8
- - chelonei - A31.8
- - extrapulmonary systemic - A31.8
- - fortuitum - A31.8
- - kakaferifu - A31.8
- - kasongo - A31.8
- - scrofulaceum - A31.8
- - simiae - A31.8
- - systemic, extrapulmonary - A31.8
- - szulgai - A31.8
- - terrae - A31.8
- - triviale - A31.8
- - xenopi - A31.8

A31.8 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
867	OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH MCC	18	2.0923
868	OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH CC	18	1.0855
869	OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITHOUT CC/MCC	18	0.6907

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert A31.8 to ICD-9-CM

ICD-9-CM Code: 031.8 - Mycobacterial dis NEC

Patient Education

Mycobacterial Infections

Mycobacteria are a type of germ. There are many different kinds. The most common one causes tuberculosis. Another one causes leprosy. Still others cause infections that are called atypical mycobacterial infections. They aren't "typical" because they don't cause tuberculosis. But they can still harm people, especially people with other problems that affect their immunity, such as AIDS.

Sometimes you can have these infections with no symptoms at all. At other times, they can cause lung symptoms similar to tuberculosis:

Cough
Weight loss
Coughing up blood or mucus
Weakness or fatigue
Fever and chills
Night sweats
Lack of appetite and weight loss

Medicines can treat these infections, but often more than one is needed to cure the infection.

[Learn More in MedlinePlus]

Code History

FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.