AutoICD API

H40.21

Non-billable

Acute angle-closure glaucoma

Acute angle-closure glaucoma

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

Status

Non-billable / Header

Block

H40-H42

Parent Code

H40.2

Child Codes

4

Coding Notes

Inclusion Terms

Alternative clinical terms for this condition

  • Acute angle-closure glaucoma attack
  • Acute angle-closure glaucoma crisis

Excludes 1

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

  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)
  • aqueous misdirection (H40.83-)
  • malignant glaucoma (H40.83-)

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 (4)

H40.211

Acute angle-closure glaucoma, right eye

BillableH40.212

Acute angle-closure glaucoma, left eye

BillableH40.213

Acute angle-closure glaucoma, bilateral

BillableH40.219

Acute angle-closure glaucoma, unspecified eye

Billable

Also Known As / Clinical Terms

UMLS

Frequently Asked Questions

What is the ICD-10 code for acute angle-closure glaucoma?

The ICD-10-CM code for acute angle-closure glaucoma is H40.21. The full clinical description is "Acute angle-closure glaucoma". H40.21 is a non-billable header code. Use a more specific child code for billing purposes.

What does ICD-10 code H40.21 mean?

ICD-10-CM code H40.21 represents "Acute angle-closure glaucoma". It is classified under Chapter 7: Diseases of the Eye and Adnexa and is a non-billable header code. Use a more specific child code for billing purposes.

Is H40.21 a billable code?

No, H40.21 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under H40.21.

What chapter is H40.21 in?

H40.21 is in Chapter 7: Diseases of the Eye and Adnexa (codes H00-H59).

What codes cannot be used with H40.21?

H40.21 has Excludes1 notes indicating codes that cannot be used together with it, including: absolute glaucoma (H44.51-); congenital glaucoma (Q15.0); traumatic glaucoma due to birth injury (P15.3); and 2 more.

What are the subcategories under H40.21?

H40.21 has 4 child codes, including: H40.211 (Acute angle-closure glaucoma, right eye), H40.212 (Acute angle-closure glaucoma, left eye), H40.213 (Acute angle-closure glaucoma, bilateral), H40.219 (Acute angle-closure glaucoma, unspecified eye).

What are the UMLS CUIs for H40.21?

H40.21 is linked to 3 UMLS Concept Unique Identifiers: C0154946, C3161424, C3161425. 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.