Results 1 to 1 of 1

Brief history of ICD

  1. Post ICD-10-CM Code Structure
    Medical Coding Books
    ICD-10-CM codes can be up to seven digits and are alpha-numeric.

    First three characters of the code describe the “category” example H60 is for otitis externa. First character is always an alphabet from A through Z (except U). Just for remembering – this first character may indicate the chapter to which the code belongs to; like ‘M' for musculoskeletal, example M19 belongs to the chapter ‘diseases of the musculoskeletal system and connective tissue'. Second character is always numeric. Third character is also numeric but could be an alphabet also, example O9A category.

    Fourth, fifth, and sixth characters can be numeric or an alphabet and describes etiology, anatomic site, location, laterality, severity, or other clinical detail. For example, in J02.x category for acute pharyngitis, fourth character describes etiology - ‘0' for streptococcal, ‘8' for other specified organisms and ‘9' for unspecified. In S41.0x category for open wound of shoulder, fifth character describes clinical detail – ‘0' for unspecified open wound, ‘1' for laceration without foreign body, ‘3' for puncture wound without foreign body, etc. In S82.00x category for unspecified fracture of patella, sixth character describes laterality – ‘1' for right patella and ‘2' for left patella.

    Seventh character again can be numeric or an alphabet and describes extension. For example in T33.011x category for superficial frostbite of right ear, seventh character describes extension – ‘A' for initial encounter, ‘D' for subsequent encounter, and ‘S' for sequela.

    If we study the above example of T33.011A superficial frostbite of right ear initial encounter, we can see that all seven characters describing their own story – first character ‘T' for chapter ‘injury' (or T for trauma), second and third character ‘33' for category ‘superficial frostbite', fourth character ‘0' for location ‘head', fifth character ‘1' for anatomic site ‘ear', sixth character ‘1' for laterality ‘right', and seventh character ‘A' for extension ‘initial encounter'.

    Visit My Blog
    Last edited by rahulasrivastava; 03-05-2013 at 05:54 AM.
    Rahul Srivastava, CPC

Similar Threads

  1. History code for DKA ICD-10
    By laurabvarga in forum Diagnosis Coding
    Replies: 3
    Last Post: 10-30-2015, 08:35 AM
  2. History of ICD.10 ???
    By summerh75 in forum Internal Medicine
    Replies: 1
    Last Post: 10-02-2015, 01:33 PM
  3. ICD-9 remission vs history codes
    By ppoole in forum Medical Coding General Discussion
    Replies: 3
    Last Post: 08-28-2014, 10:07 AM
  4. ICD-9-CM history of endometriosis
    By Charlescoder in forum Medical Coding General Discussion
    Replies: 1
    Last Post: 09-20-2011, 08:29 AM
  5. Hematemesis by history - ICD-9-CM Code
    By heatherwinters in forum Employment General Discussion
    Replies: 1
    Last Post: 03-15-2008, 05:54 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Enjoying Our Forums?

AAPC forums are a benefit of membership. Joining AAPC grants you unlimited access, allowing you to post questions and participate with our community of over 150,000 professionals.

Join Now Continue Reading Without Full Access

Already a Member?


Close Message

In addition to full participation on AAPC forums, as a member you will be able to:

  • Access to the largest healthcare job database in the world.
  • Join over 150,000 members of the healthcare network in the world.
  • Be a part of an industry leading organization that drives the business side of healthcare.
  • Save anywhere from 10%-50% with exclusive member discounts on courses, books, study materials, and conferences.
  • Access to discounts at hundreds of restaurants, travel destinations, retail stores, and service providers. AAPC members also have opportunities to save on heath, life, and liability insurance.
  • Become a member of a local chapter and attend regular meetings.