2024 ICD-10-CM Diagnosis Code B94.9

Sequelae of unspecified infectious and parasitic disease

ICD-10-CM Code:
ICD-10 Code for:
Sequelae of unspecified infectious and parasitic disease
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    • Sequelae of infectious and parasitic diseases
      • Sequelae of other and unspecified infectious and parasitic diseases

B94.9 is a billable diagnosis code used to specify a medical diagnosis of sequelae of unspecified infectious and parasitic disease. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

B94.9 is a sequela code, includes a 7th character and should be used for complications that arise as a direct result of a condition like e of unspecified infectious and parasitic disease. According to ICD-10-CM Guidelines a "sequela" code should be used for chronic or residual conditions that are complications of an initial acute disease, illness or injury. The most common sequela is pain. Usually, two diagnosis codes are needed when reporting sequela. The first code describes the nature of the sequela while the second code describes the sequela or late effect.

Unspecified diagnosis codes like B94.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Acquired bronchiectasis
  • Acute febrile neutrophilic dermatosis
  • Avascular necrosis of bone as late effect of osteomyelitis
  • Chorea due to and following infective disorder
  • Cicatrizing conjunctivitis
  • Cold autoimmune hemolytic anemia
  • Fatal post-viral neurodegenerative disorder
  • Fibrosis of pleura
  • Gastrointestinal sequelae of disorders
  • Gingival recession
  • Gingival recession following infectious disease
  • Hydroa vacciniforme-like lymphoma
  • Hydrocephalus following infectious disease
  • Hypersensitivity disorder mediated by immune complex
  • Hypotrichosis following infectious disease
  • Immunoglobulin A vasculitis
  • Infection-associated purpura
  • Infectious sequelae of disorders
  • Intercostal neuralgia
  • Intercostal neuropathy
  • Kyphosis due to and following infection
  • Lordosis deformity of spine due to and following infection
  • Neoplastic sequelae of disorders
  • Neuroretinitis
  • Neuroretinitis following infectious disease
  • Parkinsonism following infection
  • Paroxysmal cold hemoglobinuria
  • Post infectious grand mal epilepsy
  • Post infectious osteoarthritis
  • Post infectious thrombocytopenic purpura
  • Post-bacterial arthropathy
  • Postinfectious ataxia
  • Post-infectious cicatrizing conjunctivitis
  • Post-infectious cold agglutinin disease
  • Post-infectious disorder
  • Post-infectious glomerulonephritis
  • Post-infectious glomerulonephritis - Garland variety
  • Postinfectious neuralgia
  • Postinfectious neuralgia
  • Postinfectious osteopathy
  • Post-infectious scleredema
  • Post-infective bronchiectasis
  • Post-infective hypomelanosis
  • Post-infective hypopituitarism
  • Postinfective immunoglobulin A vasculitis
  • Postinfective intercostal neuralgia
  • Post-infective malabsorption
  • Post-infective myelitis
  • Postinfective peripheral neuralgia
  • Postinfective peripheral neuralgia
  • Post-infective pleural fibrosis
  • Postinfective segmental neuralgia
  • Postviral depression
  • Post-viral paroxysmal cold hemoglobinuria
  • Scleredema
  • Scoliosis due to and following infection
  • Secondary kyphosis
  • Secondary tic disorder
  • Segmental peripheral neuralgia
  • Sequela of infection caused by bacterium
  • Sequelae of infectious disease
  • Shunt nephritis
  • Sweet's disease following infection
  • Thickening of pleura
  • Thickening of skin
  • Tic due to and following infection

Clinical Classification

Clinical Information

  • Gingival Recession

    exposure of the root surface when the edge of the gum (gingiva) moves apically away from the crown of the tooth. this is common with advancing age, vigorous tooth brushing, diseases, or tissue loss of the gingiva, the periodontal ligament and the supporting bone (alveolar process).

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • post COVID-19 condition (U09.9)

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).

Present on Admission (POA)

B94.9 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA IndicatorReason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Convert B94.9 to ICD-9-CM

  • ICD-9-CM Code: 139.8 - Late eff infect dis NEC
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Infectious Diseases

What are infectious diseases?

Germs, or microbes, are found everywhere - in the air, soil, and water. There are also germs on your skin and in your body. Many of them are harmless, and some can even be helpful. But some of them can make you sick. Infectious diseases are diseases that are caused by germs.

What are the different types of germs that cause infectious diseases?

There are four main types of germs:

  • Bacteria are one-celled germs that multiply quickly. They may give off toxins, which are harmful chemicals that can make you sick. Strep throat and urinary tract infections are common bacterial infections.
  • Viruses are tiny capsules that contain genetic material. They invade your cells so that they can multiply. This can kill, damage, or change the cells and make you sick. Viral infections include HIV and the common cold.
  • Fungi are primitive plant-like organisms such as mushrooms, mold, mildew, and yeasts. Athlete's foot and yeast infections are common fungal infections.
  • Parasites are animals or plants that survive by living on or in other living things. Malaria and head lice are infections that are caused by parasites.

How can you get infectious diseases?

There are many different ways that you can get an infectious disease:

  • Through direct contact with a person who is sick. This includes kissing, touching, sneezing, coughing, and sexual contact. Pregnant people can also pass some germs along to their babies.
  • Through indirect contact, when you touch something that has germs on it. For example, you could get germs if someone who is sick touched a door handle, and then you touch it.
  • Through insect or animal bites.
  • Through contaminated food, water, soil, or plants.

What are the symptoms of infectious diseases?

Infectious diseases can cause many different symptoms. Some are so mild that you may not even notice any symptoms, while others can be life-threatening.

What are the treatments for infectious diseases?

There are treatments for some infectious diseases, such as antibiotic, antiviral, antifungal and anti-parasitic medicines. But for other infections, such as some caused by viruses, you can only treat your symptoms.

Can infectious diseases be prevented?

You can take steps to prevent many infectious diseases:

  • Get vaccinated
  • Wash your hands often
  • Pay attention to food safety
  • Avoid contact with wild animals
  • Practice safe sex (use a condom every time you have anal, vaginal, or oral sex)
  • Don't share items such as toothbrushes, combs, and straws

[Learn More in MedlinePlus]

Parasitic Diseases

Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.

Parasites range in size from tiny, one-celled organisms called protozoa to worms that can be seen with the naked eye. Some parasitic diseases occur in the United States. Contaminated water supplies can lead to Giardia infections. Cats can transmit toxoplasmosis, which is dangerous for pregnant women. Others, like malaria, are common in other parts of the world.

If you are traveling, it's important to drink only water you know is safe. Prevention is especially important. There are no vaccines for parasitic diseases. Some medicines are available to treat parasitic infections.

[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.


[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.