 Created by Alejandra Munoz, CPC, NCICS

 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.

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

Fungi – Microscopic plant life that lacks chlorophyll and must have a source of matter for nutrition.  Common fungal infections: o Yeast infections o Molds

 Organisms that feed on other organisms to nourish themselves.  Common parasites include: o Protozoa o Helminths o Arthropods

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

 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 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.

 Certain Zoonotic Bacterial Diseases- A20- A28  Other Bacterial Diseases- A30-A49  Infections with a Predominantly Sexual Mode of Transmission- A50-A64  Other Spirochetal Diseases

 Other Diseases caused by Chlamydiae- A70- A74  Richettioses- A75-A79  Viral Infections of the Central Nervous System- A80-A89  Arthropod-Borne Viral Fevers and Viral Hemorrhagic Fevers- A90-A99

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

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

 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.

 Reference the Official ICD-10-CM Coding Guidelines for chapter-specific guidelines on: o HIV infections o Infectious agents as the cause of disease classified to other chapters o Infections resistant to antibiotics o Sepsis, severe sepsis, and septic shock

 Bowie, M. (2014). Understanding ICD-10-CM & ICD-10-PCS. Cengage