ICD-10-CM Chapters

Question 1

Chapter 1
Certain Infectious and Parasitic Diseases

Answer 1

Code range A00-B99
This chapter includes diseases generally recognized as communicable or transmissible.

Question 2

Chapter 2
Neoplasms

Answer 2

Code range C00-D49
This chapter contains code assignments for malignant, benign, carcinoma in situ, and neoplasms of uncertain and unspecified behavior.

Question 3

Chapter 3
Diseases of the Blood and Blood forming Organs and Certain disorders involving the Immune Mechanism

Answer 3

Code range D50-D89
Contained within this chapter are:
Types of Anemia
Coagulation defects
Hemorrhagic conditions
Diseases of white blood cells and other components of the blood
Some diseases of the spleen and lymphatic system.

Question 4

Chapter 4
Endocrine, Nutritional, and Metabolic Diseases

Answer 4

Code range E00-E89
In this chapter are:
Disorders and diseases of the thyroid and other endocrine glands
Nutritional deficiencies
Metabolic disorders
Disorders of the immune mechanism and immunity deficiencies.

Question 5

Chapter 5
Mental, Behavioral, and Neurodevelopmental Disorders

Answer 5

Code range F01-F99
This chapter contains:
Mental disorders, including psychotic, personality, neurotic, and non psychotic disorders
Chemical dependencies, such as alcoholism and drug dependence
Intellectual disabilities and developmental disorders
Psychopathic symptoms that are not part of an organic illness.

Question 6

Chapter 6
Diseases of the Nervous System

Answer 6

Code range G00-G99
This chapter contains diseases if the central and peripheral nervous systems that include brain, spinal cord, meninges, and nerves.

Question 7

Chapter 7
Diseases of the Eye and Adnexa

Answer 7

Code range H00-H59
This chapter includes diseases of the eye and adnexa.

Question 8

Chapter 8
Diseases of the Ear and Mastoid Process

Answer 8

Code range H60-H95
This chapter includes diseases of the ear and mastoid process.

Question 9

Chapter 9
Diseases of the Circulatory System

Answer 9

Code range I00-I99
The circulatory system includes the heart, arteries, veins, and lymphatic system. Therefore, this chapter contains:
Cardiac disorders
Arterial, venous, and some lymphatic diseases.

Question 10

Chapter 10
Diseases of the Respiratory System

Answer 10

Code range J00-J99
In this chapter are diseases of:
Pharynx
Larynx
Trachea
Bronchus
Vocal cords
Sinuses
Nose
Tonsils and adenoids
Parts of the lung

Question 11

Chapter 11
Diseases of the Digestive System

Answer 11

Code range K00-K95
This chapter deals with diseases of:
Oral cavity, Salivary glands, jaws, esophagus, stomach, duodenum, appendix, abdominal cavity, small and large intestines, peritoneum, anus, liver, gallbladder, biliary tract, and pancreas

Question 12

Chapter 12
Diseases of the skin and subcutaneous Tissue

Answer 12

Code range L00-L99
This chapter includes:
Inflammatory and infectious conditions of the skin and subcutaneous tissue.
Diseases of the nail, hair and hair follicles, sweat and sebaceous glands.

Question 13

Chapter 13
Diseases of the Musculoskeletal System and Connective Tissue

Answer 13

Code range M00-M99
This chapter includes diseases of:
Bones
Joints
Bursa
Muscles
Ligaments
Tendons
Soft tissues

Question 14

Chapter 14
Diseases of the Genitourinary System

Answer 14

Code range N00-N99
Coded from this chapter are diseases of the:
Kidney
Ureter
Urinary bladder
Urethra
Male genital organs
Male and female breast, and female genital organs (not related to pregnancy, childbirth, and the postpartum period)

Question 15

Chapter 15
Pregnancy, Childbirth, and the Puerperium

Answer 15

Code range O00-O9A
This chapter includes:
Ectopic and molar pregnancies
Spontaneous abortions
Legally and illegally induced abortions
Complications of pregnancy, abortions, labor and delivery, and the postpartum period

Question 16

Chapter 16
Certain Conditions Originating in the Perinatal Period

Answer 16

Code range P00-P96
This chapter includes conditions that have their origin in the perinatal period, a period of time before birth through the first 28 days after birth.

Question 17

Chapter 17
Congenital Malformations, Deformations, and Chromosomal Abnormalities

Answer 17

Code range Q00-Q99
This chapter contains any congenital anomaly or malformation, regardless of the body system involved. A congenital anomaly is an anomaly present at or existing from the time of birth.

Question 18

Chapter 18
Symptoms, signs, and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified

Answer 18

Code range R00-R99
This chapter includes symptoms, signs, abnormal results of laboratory tests and investigative procedures, as well as I’ll defined conditions.

Question 19

Chapter 19
Injury and Poisoning and Certain Other Consequences of External Causes

Answer 19

Code range S00-T88
This chapter includes:
Fractures, dislocations, sprains and strains of joints and muscles.
Intracranial injuries
Internal injuries to the chest, abdomen, and pelvis.
Open wounds
Superficial injuries
Contusions
Burns
Poisonings by drugs and by medicinal and biological substances.
Effects of external cause

Question 20

Chapter 20
External Causes of Morbidity

Answer 20

Code range V00-Y99
This chapter includes the classification of environmental events and circumstances as the cause of injury and other adverse effects. These codes are intended to be secondary codes to accompany those from other chapters.

Question 21

Chapter 21
Factors Influencing Health Status and Contact with Health Services

Answer 21

Code range Z00-Z99
This chapter codes reasons for encounters when a person may or may not be sick and when some circumstance or problem influences the person’s health status but is not in itself a current illness or injury.

Question 22

Chapter 22
Codes for Special Purposes

Answer 22

Code range U00-U85
This chapter was added in October of 2020 to report codes for special purposes. At this time the chapter only contained one block of codes.