AutoICD API

H18.4

Non-billable

Corneal degeneration

Corneal degeneration

This is a header/category code. For billing purposes, use a more specific child code from the list below.

Status

Non-billable / Header

Block

H15-H22

Parent Code

H18

Child Codes

8

Coding Notes

Excludes 1

Codes that cannot be used together with this code (mutual exclusion)

Excludes 2

Conditions not included here, but the patient may have both

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury (trauma) of eye and orbit (S05.-)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

Child Codes (8)

H18.40

Unspecified corneal degeneration

BillableH18.41

Arcus senilis

H18.42

Band keratopathy

H18.43

Other calcerous corneal degeneration

BillableH18.44

Keratomalacia

H18.45

Nodular corneal degeneration

H18.46

Peripheral corneal degeneration

H18.49

Other corneal degeneration

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is ICD-10 code H18.4?

ICD-10-CM code H18.4 represents "Corneal degeneration". It is a non-billable header code — use a more specific child code for billing purposes.

Is H18.4 a billable code?

No, H18.4 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 8 child codes under H18.4.

What chapter is H18.4 in?

H18.4 is in Chapter 7: Diseases of the Eye and Adnexa (codes H00-H59).

What codes cannot be used with H18.4?

H18.4 has Excludes1 notes indicating codes that cannot be used together with it, including: Mooren's ulcer (H16.0-); recurrent erosion of cornea (H18.83-).

What are the subcategories under H18.4?

H18.4 has 8 child codes, including: H18.40 (Unspecified corneal degeneration), H18.41 (Arcus senilis), H18.42 (Band keratopathy), H18.43 (Other calcerous corneal degeneration), and 4 more.

What are the UMLS CUIs for H18.4?

H18.4 is linked to 1 UMLS Concept Unique Identifier: C0155118. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.

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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.