2027 ICD-10-CM Diagnosis Code H40.50X0Glaucoma secondary to other eye disorders, unspecified eye, stage unspecified

ICD-10-CM Codes›H00–H59›H40-H42›H40

ICD-10-CM H40.50X0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

H40.50X0 is a billable ICD-10-CM diagnosis code for glaucoma secondary to other eye disorders, unspecified eye, stage unspecified. The 7th character 0 means stage unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Glaucoma.

H40.50X0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 244 for payment year 2027.

Code Identity

ICD-10-CM Code
H40.50X0
Billable Status
Yes — Valid for Submission
Code Describes
Glaucoma secondary to other eye disorders, unspecified eye, stage unspecified
Short Description
Glaucoma secondary to oth eye disord, unsp eye, stage unsp
Parent Code
H40.50
Glaucoma secondary to other eye disorders, unspecified eye

Code Classification

ChapterH00–H59Diseases of the eye and adnexa
SectionH40-H42Glaucoma
CategoryH40Glaucoma
This CodeH40.50X0Glaucoma secondary to other eye disorders, unspecified eye, stage unspecified

Medicare Risk Adjustment (HCC)Billing

H40.50X0 does not risk-adjust for Medicare Advantage under the CMS-HCC V28 model, but it maps to payment categories in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
no payment category in the model that pays 100% of MA risk scores
Prior Model (CMS-HCC V24)
Not mapped under V24
this diagnosis newly risk-adjusts under the V28 model
Part D (RxHCC)
RxHCC 244 — Other Non-Acute Glaucoma
also risk-adjusts in the Part D prescription drug model (V08)

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Angle closure glaucoma due to intraocular neoplasm
  • Bilateral congenital cataract of eyes
  • Cataract glaucoma syndrome
  • Congenital glaucoma of bilateral eyes
  • Congenital glaucoma of left eye
  • Congenital glaucoma of right eye
  • Ghost cell glaucoma
  • Glaucoma and corneal anomaly
  • Glaucoma associated with ocular disorder
  • Glaucoma caused by contact lens
  • Glaucoma due to and following retinopathy of prematurity
  • Glaucoma due to anterior segment anomaly
  • Glaucoma due to congenital chamber angle anomaly
  • Glaucoma due to cyst of ciliary body
  • Glaucoma due to cyst of iris
  • Glaucoma due to intraocular neoplasm
  • Glaucoma due to iris anomaly
  • Glaucoma due to ocular cyst
  • Glaucoma due to retinal detachment
  • Glaucoma with intraocular hemorrhage
  • Lens particle glaucoma
  • Mature cataract
  • Megalocornea
  • Megalocornea, spherophakia, secondary glaucoma syndrome
  • Neovascular angle closure glaucoma
  • Neovascular glaucoma due to central retinal vein occlusion
  • Neovascular glaucoma due to hyphema
  • Neovascularization of angle due to central retinal vein occlusion
  • Open angle glaucoma due to ocular vascular disorder
  • Open angle glaucoma due to vascular disorder
  • Phacogenic glaucoma
  • Phacolytic glaucoma
  • Phacomorphic glaucoma
  • Schwartz-Matsuo syndrome
  • Secondary angle-closure due to iridocorneal endothelial syndrome
  • Secondary angle-closure glaucoma - synechial
  • Secondary angle-closure glaucoma due to iridocorneal endothelial syndrome
  • Secondary angle-closure glaucoma with pupillary block
  • Secondary glaucoma
  • Secondary glaucoma due to combination mechanisms
  • Secondary open angle glaucoma due to neovascularization
  • Secondary open-angle glaucoma

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to H40.50X0: its own notes plus those printed at H40.5, H40, and Chapter 7. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From H40 Glaucoma applies to 252 codes
  • absolute glaucoma (H44.51-)
  • congenital glaucoma (Q15.0)
  • traumatic glaucoma due to birth injury (P15.3)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • 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)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From H40.5 Glaucoma secondary to other eye disorders applies to 20 codes
  • underlying eye disorder

Notes

General instructions on how these codes are used.

From Chapter 7 (H00-H59) Diseases of the eye and adnexa applies to 2,677 codes
  • Use an external cause code following the code for the eye condition, if applicable, to identify the cause of the eye condition

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From H40.5 Glaucoma secondary to other eye disorders applies to 20 codes
  • One of the following 7th characters is to be assigned to each code in subcategory H40.5 to designate the stage of glaucoma
Values for category H40.5 Glaucoma Stage
  • 0stage unspecified this code
  • 1mild stage
  • 2moderate stage
  • 3severe stage
  • 4indeterminate stage

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR EYE003
Glaucoma
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Glaucoma

    an ocular disease, occurring in many forms, having as its primary characteristics an unstable or a sustained increase in the intraocular pressure which the eye cannot withstand without damage to its structure or impairment of its function. the consequences of the increased pressure may be manifested in a variety of symptoms, depending upon type and severity, such as excavation of the optic disk, hardness of the eyeball, corneal anesthesia, reduced visual acuity, seeing of colored halos around lights, disturbed dark adaptation, visual field defects, and headaches. (dictionary of visual science, 4th ed)

Patient EducationClinical

Glaucoma

Glaucoma is a group of diseases that can damage the optic nerve of one, or both, of your eyes. This can result in vision loss. There are different types of glaucoma, but the most common type is open-angle glaucoma. Other less common types include angle-closure glaucoma, and congenital glaucoma.

The full article covers:

  • What is glaucoma?
  • What causes glaucoma?
  • What are the symptoms of glaucoma?
  • How is glaucoma diagnosed?
  • What are the treatments for glaucoma?
  • Can glaucoma be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert H40.50X0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
365.59 Glaucoma w lens dis NEC
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
365.60 Glauc w ocular dis NOS
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
365.61 Glauc w pupillary block
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
365.64 Glaucoma w tumor or cyst
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
365.70 Glaucoma stage NOS
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About H40.50X0Overview

Is H40.50X0 (Glaucoma secondary to other eye disorders, unspecified eye) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report glaucoma secondary to other eye disorders, unspecified eye, stage unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character 0 in H40.50X0 mean?

The final character 0 means stage unspecified, in this case for the glaucoma secondary to other eye disorders. It comes from the 7th character list in the CMS Tabular List for this category.

What MS-DRG does H40.50X0 group to?

When glaucoma secondary to other eye disorders, unspecified eye, stage unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 125, 124, with relative weights from 0.7699 to 1.2470 depending on complications. Higher weights mean higher Medicare reimbursement.

Can H40.50X0 be reported with a code from H44.51?

Not as a rule. The Excludes1 note at H40, which applies to H40.50X0, lists "absolute glaucoma (H44.51-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of H40.50X0?

Under the General Equivalence Mappings, glaucoma secondary to other eye disorders, unspecified eye, stage unspecified converts to ICD-9-CM 365.59 (glaucoma w lens dis NEC), 365.60 (glauc w ocular dis NOS), and 365.61 (glauc w pupillary block). The mapping is approximate, so confirm the match fits the documentation.

Does H40.50X0 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage: H40.50X0 maps to no category in the CMS-HCC V28 model. It still risk-adjusts in the RxHCC Part D (V08) category 244 (Other Non-Acute Glaucoma).