Among the various improvements to ICD-10-CM is the addition of two new chapters to represent the eye and adnexa, and the ear and mastoid process.
In ICD-9-CM all diseases of the nervous system, including the eye/adnexa and the ear/mastoid processes, are represented in chapter 6. In ICD-10-CM only those diseases of the nervous system are represented in chapter 6. Diseases of the sense organs each have their own chapter in ICD-10-CM.
Chapter 6 of ICD-10-CM includes categories G00-G99, diseases of the nervous system, arranged in blocks. Here is a quick glimpse at those blocks:
| G-00-G09 Inflammatory diseases of the central nervous system
G10-G14 Systemic atrophies primarily affecting the central nervous system G20-G26 Extrapyramidal and movement disorders G30-G32 Other degenerative diseases of the nervous system G35-G37 Demyelinating diseases of the nervous system G40-G47 Episodic and Paroxysmal disorders G50-G59 Nerve, nerve root and plexus disorders G60-G65 Polyneuropathies and other disorders of the peripheral nervous system G70-G73 Diseases of the myoneural junction and muscle G80-G83 Cerebral Palsy and other paralytic syndromes G89-G99 Other disorders of the nervous system |
Chapter 7 of ICD-10-CM is an entirely new chapter. Chapter 7 represents the diseases of eyes and adnexa, formerly appearing in chapter 6 with the diseases of the nervous system in ICD-9-CM. Chapter 7 includes categories H00-H59 arranged in the following blocks.
Here is a quick glimpse at those blocks:
| H00-H05 Disorders of the eyelid, lacrimal system and orbit
H1-H11 Disorders of the conjunctiva H15-H22 Disorders of the sclera, cornea, iris and ciliary body H25-H28 Disorders of the lens H30-H36 Disorders of the choroid and retina H40-H42 Glaucoma H43-H44 Disorders of the vitreous body and globe H46-H47 Disorders of the optic nerve and visual pathways H49-H52 Disorders of ocular muscles, binocular movement, accommodation and refraction H53-H54 Other disorders of the eye and adnexa H59 Intraoperative and postprocedural complications and disorders of the eye and Adnexa, not elsewhere classified |
Finally, chapter 8 also is entirely new in ICD-10-CM. This chapter of diseases of the ear and mastoid process includes categories H60-H95 represented in the following blocks. The arrangement of these blocks makes it easier to identify the types of conditions that occur in the external ear (block 1), middle ear (block 2), and inner ear (block 3).
Here is a quick glimpse at those blocks:
| H60-H62 Diseases of the external ear
H65-H75 Diseases of the middle ear and mastoid H80-H83 Diseases of the inner ear H90-H94 Other disorders of the ear H95 Intraoperative and post-procedural complications and disorders of ear and mastoid process, Not elsewhere classified |
Each one of these chapters encompasses quite a few changes. The changes include greater specificity, the delineation of laterality, and several more “code first underlying disease” notes, with the addition also of bilateral sides for diseases of the eye and adnexa.
In the currently published version of ICD-10-CM, we have chapter-specific guidelines related to chapter 6 (diseases of the nervous system) and chapter 7 (diseases of the eye and adnexa), but do not have chapter-specific guidelines for chapter 8 (diseases of the ear and mastoid process).
In the articles to follow, we will dive into each one of these chapters to look at the specific differences, changes, and updates to terminology.
Stay tuned!
For more ICD-10 articles, please visit our ICD-10 Updates page.
— Compiled by former CIPROMS ICD-10 Coordinator, Angela Hickman, CPC, CEDC, AHIMA-Approved ICD-10 CM/PCS Trainer, AHIMA Ambassador. All rights reserved. For use or reprint in your blog, website, or publication, please contact us at cipromsmarketing@ciproms.com.
