What is ICD-10 code H18.322?

H18.322 is the ICD-10-CM diagnosis code for Folds in Descemet's membrane, left eye. It belongs to the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59). H18.322 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. H18.322 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. H18.322 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. H18.322 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

Which HCC does H18.322 map to under V28?

H18.322 has no payable CMS-HCC V28 mapping in the final FY2026 CMS file.

What RAF reference is published for H18.322?

H18.322 has no V28 reference coefficient because the final FY2026 source verifies no payable V28 mapping.

What is the V28 vs V24 difference for H18.322?

H18.322 has verified no payable V28 mapping in the final FY2026 source. Select a historical effective period before making any V24 comparison.

2026 ICD-10-CM H18.322: Folds in Descemet's membrane, left

H18.322 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools

ICD-10-CM Code View

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Code lookupH18.322

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the eye and adnexa (H00-H59) / Disorders of sclera, cornea, iris and ciliary body (H15-H22)

H18.322

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Folds in Descemet's membrane, left eye

This condition involves wrinkles or creases that form in Descemet's membrane, which is a thin layer in the cornea (the clear front part of the eye). This occurs in the left eye and can affect vision clarity.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

H18.3Changes of corneal membranes H18.32Folds in Descemet's membrane H18.322Folds in Descemet's membrane, left eye

Inclusion Terms

Official

No inclusion terms are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Excludes 2

Official

certain conditions originating in the perinatal period (P04-P96)Inherited from H00-H59
certain infectious and parasitic diseases (A00-B99)Inherited from H00-H59
complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from H00-H59
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from H00-H59
diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)Inherited from H00-H59
endocrine, nutritional and metabolic diseases (E00-E88)Inherited from H00-H59
injury (trauma) of eye and orbit (S05.-)Inherited from H00-H59
injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from H00-H59
neoplasms (C00-D49)Inherited from H00-H59
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from H00-H59
syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)Inherited from H00-H59

Related Codes

Official

H18.321Folds in Descemet's membrane, right eye H18.323Folds in Descemet's membrane, bilateral H18.329Folds in Descemet's membrane, unspecified eye

Includes

Official

No Includes notes are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Excludes 1

Official

No Excludes 1 notes are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for H18.322. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Ensure you have documentation specifying the left eye (H18.322) versus right eye (H18.321) or bilateral (H18.323) to assign the correct code

This code is typically used for corneal conditions identified during eye examination; verify the condition is documented as folds in Descemet's membrane and not other corneal pathology

Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →

Is H18.322 an HCC code?

No. H18.322 is a billable ICD-10-CM code with no mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models.

Code: H18.322
Description: Folds in Descemet's membrane, left eye
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

H18.322 is the ICD-10-CM diagnosis code for folds in descemet's membrane, left eye. This condition involves wrinkles or creases that form in Descemet's membrane, which is a thin layer in the cornea (the clear front part of the eye). This occurs in the left eye and can affect vision clarity. H18.322 sits in the ICD-10-CM chapter for diseases of the eye and adnexa (h00-h59), within the section covering disorders of sclera, cornea, iris and ciliary body (h15-h22).

H18.322 is a billable ICD-10-CM code, but the current payload does not show a mapping under the CMS-HCC V28 or V24 community payment models, and none under the ESRD, Part D RxHCC, or HHS-HCC models. Do not assign risk adjustment value from this page when no source-backed mapping is shown; verify the applicable model and payment year.

Ensure you have documentation specifying the left eye (H18.322) versus right eye (H18.321) or bilateral (H18.323) to assign the correct code.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for H18.322 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Ensure you have documentation specifying the left eye (H18.322) versus right eye (H18.321) or bilateral (H18.323) to assign the correct code
•This code is typically used for corneal conditions identified during eye examination; verify the condition is documented as folds in Descemet's membrane and not other corneal pathology