Title: ICD-10 Procedure Coding System
Content:  Each code consists of seven alphanumeric characters. The first character is the 'section'. The second through seventh characters mean different things in each section. Each character can be any of 34 possible values the ten digits 0-9 and the 24 letters A-H, J-N and P-Z may be used in each character. The letters O and I are excluded to avoid confusion with the numbers 0 and 1. There are no decimals in ICD-10-PCS Of the 72,081 codes in ICD-10-PCS, 62,022 are in the first section, "Medical and surgical".
Title: ICD-10
Content:  more than 14,000 different codes and permits the tracking of many new diagnoses compared to the preceding ICD-9. Through the use of optional sub-classifications, ICD-10 allows for specificity regarding the cause, manifestation, location, severity, and type of injury or disease. The adapted versions may differ in a number of ways, and some national editions have expanded the code set even further; with some going so far as to add procedure codes. ICD-10-CM, for example, has over 70,000 codes. The WHO provides detailed information regarding the ICD via its website – including an ICD-10 online browser and ICD training materials. The online training includes a support forum, a self-learning tool and user guide.
Title: ICD-11
Content:  The ICD-11 MMS features a more flexible coding structure. In the ICD-10, every code starts with a letter, indicating the chapter. This is followed by a two digit number (e.g. ), creating 99 slots per chapter, excluding subcategories and blocks. This proved enough for most chapters, but four are so voluminous that they span two letters: chapter 1 (A00–B99), chapter 2 (C00.0–D48.9), chapter 19 (S00–T98), and chapter 20 (V01–Y98). In the ICD-11 MMS, there is a single first character for every chapter. The codes of the first nine chapters begin with the numbers 1 to 9, while the next nineteen chapters start with the letters A to 
Title: ICD-11
Content:  code, although each entity does have a unique id. In the ICD-10, the next level of the hierarchy is indicated in the code by a dot and a single number (e.g. ). This is the lowest available level in the ICD-10 hierarchy, causing an artificial limitation of 10 subcategories per code (.0 to .9). In the ICD-11 MMS, this is no longer the case: after 0-9, the list may continue with A-Z (e.g. – ). Then, following the first character after the dot, a second character may be used in the next level of the hierarchy (e.g. – ). This level is currently the lowest appearing in 
Title: ICD-10
Content:  The expansion of healthcare delivery systems and changes in global health trends prompted a need for codes with improved clinical accuracy and specificity. The alphanumeric coding in ICD-10 is an improvement from ICD-9 which had a limited number of codes and a restrictive structure. Early concerns in the implementation of ICD-10 included the cost and the availability of resources for training healthcare workers and professional coders. Two common complaints in the United States about the ICD-10-CM are 1) the long list of potentially relevant codes for a given condition (such as rheumatoid arthritis) which can be confusing and reduce efficiency and 2) the assigned codes for seldom seen conditions (e.g. W55.22XA: Struck by cow, initial encounter and V91.07XA: Burn due to water-skis on fire, initial encounter).
Title: ICD-11
Content:  The letters I and O are not used, to prevent confusion. The chapter character is then followed by a letter, a number, and a fourth character that starts as a number (0-9, e.g. ) and may then continue as a letter (A-Z, e.g. ). The ICD-11 Reference Guide notes that the WHO opted for a forced number as the third character to prevent the spelling of 'undesirable words'. In the ICD-10, each entity within a chapter either has a code (e.g. ) or a code range (e.g. ). The latter is a block. In the ICD-11 MMS, blocks never have codes, and not every entity necessarily has 
Title: ICD-10
Content:  ICD-10 is the 10th revision of the International Statistical Classification of Diseases and Related Health Problems (ICD), a medical classification list by the World Health Organization (WHO). It contains codes for diseases, signs and symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or diseases. Work on ICD-10 began in 1983, became endorsed by the Forty-third World Health Assembly in 1990, and was first used by member states in 1994. It will be replaced by ICD-11 on January 1, 2022. While WHO manages and publishes the base version of the ICD, several member states have modified it to better suit their needs. In the base classification, the code set allows 
Title: ICD-10
Content:  For disease reporting, the US utilizes its own national variant of ICD-10 called the ICD-10 Clinical Modification (ICD-10-CM). A procedural classification called ICD-10 Procedure Coding System (ICD-10-PCS) has also been developed for capturing inpatient procedures. The ICD-10-CM and ICD-10-PCS were developed by the Centers for Medicare and Medicaid Services (CMS) and the National Center for Health Statistics (NCHS). There are over 70,000 ICD-10-PCS procedure codes and over 69,000 ICD-10-CM diagnosis codes, compared to about 3,800 procedure codes and roughly 14,000 diagnosis codes found in the previous ICD-9-CM. There was much controversy when the transition from the ICD-9-CM to the ICD-10-CM was first announced in the US. Many providers were concerned 
Title: ICD-10
Content:  The following table lists the chapter number (using Roman numerals), the code range of each chapter, and the chapter's title from the international version of the ICD-10.
Title: International Classification of Diseases
Content:  classification system allows more than 55,000 different codes and permits tracking of many new diagnoses and procedures, a significant expansion on the 17,000 codes available in ICD-9. Adoption was relatively swift in most of the world. Several materials are made available online by WHO to facilitate its use, including a manual, training guidelines, a browser, and files for download. Some countries have adapted the international standard, such as the "ICD-10-AM" published in Australia in 1998 (also used in New Zealand), and the "ICD-10-CA" introduced in Canada in 2000. ICD-10-CM Adoption of ICD-10-CM was slow in the United States. Since 1979, the US had required ICD-9-CM codes for Medicare and 

Question: how many characters are present in icd-10 codes?
Answer: 7.