H40.00
Non-billablePreglaucoma, unspecified
Preglaucoma, unspecified
This is a header/category code. For billing purposes, use a more specific child code from the list below.
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 (4)
Also Known As / Clinical Terms
Frequently Asked Questions
What is the ICD-10 code for preglaucoma, unspecified?
The ICD-10-CM code for preglaucoma, unspecified is H40.00. The full clinical description is "Preglaucoma, unspecified". H40.00 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code H40.00 mean?
ICD-10-CM code H40.00 represents "Preglaucoma, unspecified". 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 H40.00 a billable code?
No, H40.00 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 H40.00.
What chapter is H40.00 in?
H40.00 is in Chapter 7: Diseases of the Eye and Adnexa (codes H00-H59).
What codes cannot be used with H40.00?
H40.00 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).
What are the subcategories under H40.00?
H40.00 has 4 child codes, including: H40.001 (Preglaucoma, unspecified, right eye), H40.002 (Preglaucoma, unspecified, left eye), H40.003 (Preglaucoma, unspecified, bilateral), H40.009 (Preglaucoma, unspecified, unspecified eye).
What are the UMLS CUIs for H40.00?
H40.00 is linked to 1 UMLS Concept Unique Identifier: C0549470. 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.