2026 ICD-10-CM Diagnosis Code T26.00XABurn of unspecified eyelid and periocular area, initial encounter
T26.00XA is a billable ICD-10-CM diagnosis code for burn of unspecified eyelid and periocular area, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 124 through 125. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Burn and corrosion, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abrasion and/or friction burn of eyelids and/or periocular area
- Burn of eye region with burn of face
- Burn of eye region with epidermal burn of face
- Burn of eye region with epidermal burn of head and/or neck
- Burn of eye region with full thickness burn of face
- Burn of eye region with full thickness burn of head and/or neck
- Burn of eye region with partial thickness burn of face
- Burn of eye region with partial thickness burn of head and/or neck
- Burn of lower eyelid
- Burn of periocular tissue
- Burn of periorbital region
- Burn of skin of eye region
- Burn of upper eyelid
- Burn to eyelid - blister
- Epidermal burn of eyelid
- Epidermal burn of periorbital region
- Eyelid burn
- Full thickness burn of eyelid
- Full thickness burn of periorbital region
- Partial thickness burn of periorbital region
- Thermal burn of eyelid
Coding GuidelinesGuidance
The ICD-10-CM makes a distinction between burns and corrosions. The burn codes are for thermal burns, except sunburns, that come from a heat source, such as a fire or hot appliance. The burn codes are also for burns resulting from electricity and radiation. Corrosions are burns due to chemicals. The guidelines are the same for burns and corrosions.
Sequence first the code that reflects the highest degree of burn when more than one burn is present.
- When the reason for the admission or encounter is for treatment of external multiple burns, sequence first the code that reflects the burn of the highest degree.
- When a patient has both internal and external burns, the circumstances of admission govern the selection of the principal diagnosis or first-listed diagnosis.
- When a patient is admitted for burn injuries and other related conditions such as smoke inhalation and/or respiratory failure, the circumstances of admission govern the selection of the principal or first-listed diagnosis.
Burns of the eye and internal organs (T26-T28) are classified by site, but not by degree.
Classify burns of the same local site (three-character category level, T20-T28) but of different degrees to the subcategory identifying the highest degree recorded in the diagnosis.
The appropriate 7th character is to be added to each code from block Burn and corrosion confined to eye and adnexa (T26). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Burns
A burn is damage to your body's tissues caused by heat, chemicals, electricity, sunlight, or radiation. Scalds from hot liquids and steam, building fires and flammable liquids and gases are the most common causes of burns. Another kind is an inhalation injury, caused by breathing smoke.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T26.00XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T26.00XAOverview
Is T26.00XA (Burn of unspecified eyelid and periocular area) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report burn of unspecified eyelid and periocular area, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T26.00XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for burn of unspecified eyelid and periocular area, such as an emergency visit or first evaluation.
What MS-DRG does T26.00XA group to?
When burn of unspecified eyelid and periocular area, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 124, 125, with relative weights from 0.7678 to 1.3231 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T26.00XA?
Under the General Equivalence Mappings, burn of unspecified eyelid and periocular area, initial encounter converts to ICD-9-CM 940.1 (burn periocular area NEC). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
