Mary Jo Bowie MS, BS, AAS, RHIA, RHIT

Infectious and Parasitic Diseases CHAPTER 6 Infectious and Parasitic Diseases

Infectious and Parasitic Diseases— Code Range A00-B99 Infectious and parasitic diseases are reported from Chapter 1 of ICD-10-CM. Infectious diseases occur when a pathogen invades the body and causes disease.

Bacterial Infections Bacteria are one-celled organisms that are named according to their shapes and arrangements. Bacterial infections include: Salmonella E. coli Streptococci Mycobacterium tuberculosis

Bacterial Shapes © Cengage Learning 2014

Fungal Infections Fungi—Microscopic plant life that lacks chlorophyll and must have a source of matter for nutrition. Common fungal infection: Yeast infections Molds

Parasites Parasites are organisms that feed on other organisms to nourish themselves. Common parasites include: Protozoa Helminths Arthropods

Viral Infections Viruses are the smallest of infectious pathogens. Common viral infections include: Herpes zoster—shingles Varicella—chickenpox HIV—AIDS Herpes simplex—genital herpes RNA virus—German measles

Intestinal Infectious Diseases—A00-A09 This range of codes includes cholera, shingellosis, and other bacterial infections. Food poisoning and viral intestinal infections are also found here. Common symptoms include: nausea, vomiting, anorexia, abdominal pain, fever, muscular aches, and malaise.

Tuberculosis- A15-A19 Tuberculosis is caused by Mycobacterium tuberculosis. Reference the instructional notations found at the beginning of the section. Symptoms include: fatigue, weakness, loss of appetite and weight, coughing, hemoptysis, night sweats, and increased temperature later in the day and evening.

Other Infectious Diseases Certain Zoonotic Bacterial Disease—A20-A28 Other Bacterial Diseases—A30-A49 Infections with a Predominantly Sexual Mode of Transmission—A50-A64 Other Spirochetal Diseases—A65-A69

Additional Infectious Diseases Other Diseases Caused by Chlamydiae—A70-A74 Richettsioses—A75- A79 Viral Infections of the Central Nervous System—A80-A89 Arthropod-Borne Viral Fevers and Viral Hemorrhagic Fevers—A90-A99

Viral Diseases Viral Infections Characterized by Skin and Mucous Membrane Lesions—B00-B09 Other Human Herpesviruses—B10 Viral Hepatitis- B15-B19 Human Immunodeficiency Virus Disease—B20 Other Viral Diseases—B25-B34

Other Infectious Diseases Mycoses—B35-B49 Protozoal Diseases—B50-B64 Helminthiases—B65-B83 Pediculosis, Acariasis, and Other Infestations—B85-B89 Sequelae of Infectious and Parasitic Diseases—B90-B94 Bacterial and Viral Infectious Agents—B95-B97 Other Infectious Diseases—B99

Key Points to Remember Single, combination, and dual code assignment are used for coding in this chapter of ICD-10-CM. An underlying condition/infection is sequenced first, followed by the manifestation code. Coders should be cautious when reporting HIV cases and reference documentation prior to code assignment.

Key Points (cont.) Reference the Official ICD-10-CM Coding Guidelines for chapter-specific guidelines on: HIV infections Infectious agents as the cause of diseases classified to other chapters Infections resistant to antibiotics Sepsis, severe sepsis, and septic shock

Key Points (cont.) Additional guidelines: Methicillin resistant Staphylococcus aureus (MRSA) conditions

Select the correct code for: Coding Practice Select the correct code for: Amebic liver abscess

Coding Practice Solution Main term to reference in index: Abscess Modifying term: Liver, then amebic Code Assignment: A06.4