2027 ICD-10-CM Diagnosis Code B02.33Zoster keratitis
ICD-10-CM Codes›A00–B99›B00-B09›B02
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
B02.33 is a billable ICD-10-CM diagnosis code for zoster keratitis. 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, 791, 793, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 6 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Cornea and external disease and Viral infection.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral conjunctivitis of eyes caused by herpes zoster virus
- Bilateral herpes zoster corneal epitheliopathy
- Bilateral herpes zoster keratoconjunctivitis
- Bilateral interstitial keratitis caused by Human alphaherpesvirus 3
- Bilateral interstitial keratitis of eyes
- Bilateral keratitis caused by Varicellovirus humanalpha3
- Bilateral keratoconjunctivitis of eyes
- Bilateral superficial keratitis
- Bilateral viral conjunctivitis
- Conjunctivitis of left eye caused by herpes zoster virus
- Conjunctivitis of right eye caused by herpes zoster virus
- Corneal dendrite
- Corneal endotheliitis
- Herpes zoster conjunctivitis
- Herpes zoster corneal endotheliitis
- Herpes zoster corneal epitheliopathy
- Herpes zoster corneal epitheliopathy of left eye
- Herpes zoster corneal epitheliopathy of right eye
- Herpes zoster interstitial keratitis
- Herpes zoster keratitis
- Herpes zoster keratoconjunctivitis
- Herpes zoster pseudodendrites
- Herpes zoster subepithelial infiltrates
- Infectious epithelial keratitis
- Interstitial keratitis of left eye caused by Herpes zoster virus
- Interstitial keratitis of right eye caused by Herpes zoster virus
- Keratitis of eye caused by Varicellovirus humanalpha3
- Keratitis of left eye caused by Varicellovirus humanalpha3
- Keratitis of left eye due to herpes zoster
- Keratitis of right eye caused by Varicellovirus humanalpha3
- Keratitis of right eye due to herpes zoster
- Keratoconjunctivitis of left eye due to herpes zoster
- Keratoconjunctivitis of right eye due to herpes zoster
- Superficial keratitis of left eye
- Superficial keratitis of right eye
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B02.33: its own notes plus those printed at B02 and Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- shingles
- zona
- diseases generally recognized as communicable or transmissible
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Herpes zoster keratoconjunctivitis
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.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B02.33, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming B02.33: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 4
These codes carry an Excludes2 note naming B02.33: its condition is not part of those codes, and both may be reported when the patient has both.
- B10 Other human herpesvirusesherpes zoster (B02.-) names B02.-, which includes this code
- B10 Other human herpesviruseshuman herpesvirus 3 (B01.-, B02.-) names B02.-, which includes this code
- B10 Other human herpesviruseszoster (B02.-) names B02.-, which includes this code
- Block L00-L08 Infections of the skin and subcutaneous tissuezoster (B02.-) names B02.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Herpes, herpesvirus, herpetic B00.9
cornea B02.33
keratitis (simplex) (dendritic) (disciform) (interstitial) B00.52
zoster (interstitial) B02.33
keratoconjunctivitis (simplex) B00.52
zoster B02.33
zoster See Also: condition; B02.9
keratitis (interstitial) B02.33
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Shingles
Shingles (herpes zoster) is an infection that causes a painful rash. It is caused by the varicella-zoster virus (VZV). This is the same virus that causes chickenpox. After you have chickenpox, the virus stays in your body. It may not cause problems for many years. But as you get older, the virus may become active again and cause shingles.
The full article covers:
- What is shingles?
- Is shingles contagious?
- Who is at risk for shingles?
- What are the symptoms of shingles?
- What other problems can shingles cause?
- How is shingles diagnosed?
- What are the treatments for shingles?
- Can shingles be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B02.33 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B02.33Overview
What is the ICD-10 code for zoster keratitis?
The ICD-10-CM code for zoster keratitis is B02.33 (sometimes written as B0233). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B02.33 (Zoster ocular disease) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report zoster keratitis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B02.33 group to?
When zoster keratitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 974, 125, 976, 975, 124, with relative weights from 0.7699 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is B02.33 a CC or MCC?
CMS lists B02.33 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 6 closely related codes in its exclusion list.
What is the ICD-9 equivalent of B02.33?
Under the General Equivalence Mappings, zoster keratitis converts to ICD-9-CM 053.21 (h zoster keratoconjunct). The mapping is a direct match.
