Is H21.301 a billable ICD-10 code?

Yes. H21.301 (Idiopathic cysts of iris, ciliary body or anterior chamber, right eye) is billable and can be used for insurance claims. Always verify payer-specific requirements.

H21.301 ✓ Billable

Idiopathic cysts of iris, ciliary body or anterior chamber, right eye

Q: What is ICD-10 code H21.301?

ICD-10-CM code H21.301 stands for "Idiopathic cysts of iris, ciliary body or anterior chamber, right eye". It is a billable code in the Diseases of the Eye and Adnexa chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Diseases of the Eye and Adnexa

Code

H21.301

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Diseases of the Eye and Adnexa

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code H21.301?

ICD-10-CM code H21.301 represents Idiopathic cysts of iris, ciliary body or anterior chamber, right eye. It is a billable diagnosis code in the Diseases of the Eye and Adnexa chapter, effective October 1, 2025 – September 30, 2026.

Is H21.301 billable?

Yes. H21.301 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is H21.301 in?

H21.301 belongs to the Diseases of the Eye and Adnexa chapter (H00–H59) of ICD-10-CM.

Related codes in the H21 category

H21 Other disorders of iris and ciliary body Non-billable H21.0 Hyphema Non-billable H21.1 Other vascular disorders of iris and ciliary body Non-billable H21.2 Degeneration of iris and ciliary body Non-billable H21.3 Cyst of iris, ciliary body and anterior chamber Non-billable H21.4 Pupillary membranes Non-billable H21.5 Other and unspecified adhesions and disruptions of iris and ciliary body Non-billable H21.8 Other specified disorders of iris and ciliary body Non-billable

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