ICD-10 Code H04.123: Dry Eye Syndrome Billing Guide for Ophthalmology

What Is ICD-10 Code H04.123?

ICD-10 code H04.123 is a billable diagnosis code that represents dry eye syndrome of bilateral lacrimal glands, classified under Chapter 7 of the ICD-10-CM system (Diseases of the Eye and Adnexa). This code is used when a provider documents dry eye syndrome caused by insufficient tear production or excessive tear evaporation affecting the lacrimal glands of both eyes. H04.123 falls within the H00-H05 code block covering disorders of the eyelid, lacrimal system, and orbit, and it has been valid and unchanged through the FY2027 ICD-10-CM release (effective October 1, 2026).

Billable status: H04.123 is a fully billable, specific code that can be submitted directly to Medicare, Medicaid, and commercial insurance carriers. Unlike its parent code H04.12 (which is a non-billable header), H04.123 requires no additional characters.

Laterality requirement: The “3” at the end of H04.123 designates bilateral involvement. If only one eye is affected, use H04.121 (right lacrimal gland) or H04.122 (left lacrimal gland) instead. Submitting H04.129 (unspecified) when laterality is documented invites payer scrutiny and potential downcoding.

Excludes1 note: Congenital malformations of the lacrimal system (Q10.4 through Q10.6) cannot be coded alongside H04.123. If the dry eye stems from a congenital lacrimal abnormality, the Q10 code takes precedence.

How ICD-10 Classifies Dry Eye Syndrome

Dry eye syndrome is one of the most commonly diagnosed ocular conditions in the United States, yet the ICD-10-CM system splits it across multiple code families depending on the underlying cause, laterality, and associated conditions. Understanding which code to use starts with identifying where H04.123 fits within this framework.

H04.123 sits under category H04 (Disorders of lacrimal system), specifically within subcategory H04.12 (Dry eye syndrome). The H04.12 family contains four child codes:

Code	Description	Billable?
H04.121	Dry eye syndrome of right lacrimal gland	Yes
H04.122	Dry eye syndrome of left lacrimal gland	Yes
H04.123	Dry eye syndrome of bilateral lacrimal glands	Yes
H04.129	Dry eye syndrome of unspecified lacrimal gland	Yes

The parent code H04.12 is non-billable and cannot be submitted on claims. Payers require one of the four child codes above, selected based on documented laterality.

Providers often come to us after receiving denials because their billing team submitted H04.12 as the diagnosis code. That single missing digit turns a clean claim into an automatic rejection at the clearinghouse level. The fix is straightforward: always code to the highest specificity. If clinical documentation says “bilateral dry eye syndrome,” H04.123 is the correct selection.

It is important to note that H04.123 specifically covers dry eye syndrome involving the lacrimal glands. Dry eye conditions originating from other causes may map to different code families entirely. Keratoconjunctivitis sicca associated with Sjogren’s syndrome, for example, is coded under M35.01 (Sjogren’s syndrome with keratoconjunctivitis), not under H04.12. The distinction is clinically and financially significant because Sjogren’s-related dry eye often qualifies for different coverage pathways and treatment authorizations.

For practices navigating 2027 ophthalmology Medicare payment changes, staying current on which dry eye codes are affected by fee schedule adjustments is critical.

What Is the Difference Between H04.123 and Other Dry Eye Codes?

H04.123 codes bilateral dry eye syndrome of the lacrimal glands, but ophthalmology practices encounter multiple ICD-10 codes that can apply to dry eye presentations. Selecting the wrong code leads to claim mismatches, medical necessity denials, and lost revenue on procedures like punctal plug insertion.

Code	Description	When to Use
H04.123	Dry eye syndrome of bilateral lacrimal glands	Bilateral lacrimal gland-related dry eye documented on exam
H04.121	Dry eye syndrome of right lacrimal gland	Unilateral dry eye, right eye only
H04.122	Dry eye syndrome of left lacrimal gland	Unilateral dry eye, left eye only
H04.129	Dry eye syndrome of unspecified lacrimal gland	Laterality not documented (avoid when possible)
H16.229	Keratoconjunctivitis sicca, unspecified eye	Dry eye with corneal involvement, non-Sjogren’s
M35.01	Sjogren’s syndrome with keratoconjunctivitis	Dry eye confirmed secondary to Sjogren’s autoimmune disease
H11.30	Conjunctivochalasis, unspecified eye	Redundant conjunctival tissue contributing to tear film instability

The most common issue we see providers run into is defaulting to H04.129 (unspecified) even when the exam clearly documents bilateral involvement. Unspecified codes send a signal to payers that the clinical documentation was incomplete, which can trigger additional documentation requests or reduce reimbursement on associated procedures.

One question we hear constantly from practice managers involves when to use H04.123 versus H16.229. The key distinction is anatomical origin. H04.123 describes a lacrimal gland disorder, meaning the tear production mechanism itself is deficient. H16.229 applies when the dry eye has progressed to involve the corneal surface (keratoconjunctivitis). In cases where both conditions are present, both codes can be reported on the same claim, with H04.123 listed first as the primary condition driving the encounter.

Which CPT Codes Pair with H04.123?

The CPT codes billed alongside H04.123 depend on the services rendered during the encounter. Dry eye evaluation visits, diagnostic testing, and therapeutic procedures each carry different coding requirements. Using H04.123 as the supporting diagnosis, the following CPT codes are most frequently paired:

Evaluation and management codes. Use the E/M code set (99202-99215) for dry eye evaluation visits. The ophthalmologic exam codes (92002-92014) were deleted effective January 1, 2023, so E/M codes are now the only option. Consider 99213 for mild to moderate dry eye evaluation and 99214 for severe or complex presentations.

Diagnostic testing. Diagnostic tests for dry eye syndrome, including Schirmer testing, tear film break-up time (TFBUT), and tear osmolarity testing, do not carry separate CPT procedure codes. According to AMA CPT guidelines, these tests are considered part of the comprehensive eye examination and are included in the exam code. Billing them separately risks duplicate payment flags.

Punctal plug insertion (CPT 68761). CPT 68761 covers closure of the lacrimal punctum by plug insertion and is the primary procedural code for dry eye treatment beyond artificial tears and prescription drops. This code applies to both temporary collagen plugs and permanent silicone plugs. Key billing rules for 68761:

Bill one unit per punctum occluded. Use E-modifiers (E1 through E4) for Medicare to designate the specific lid and eye. Apply modifier -50 for bilateral procedures when required by the payer. The global period for 68761 is 10 days. Medicare typically reimburses for two plugs per beneficiary per date of service unless documentation supports all four. Most non-Medicare payers allow separate billing for plug supplies using HCPCS codes A4262 (temporary absorbable plug) or A4263 (permanent nondissolvable plug).

In our experience matching providers with billing partners, practices that perform punctal plug insertion without understanding the E-modifier and bilateral billing rules leave significant revenue on the table. A practice inserting four plugs and billing 68761 as a single line item is losing up to 75% of the procedure reimbursement. For detailed CPT 68761 billing rules, see our guide on CPT code 68761 for punctal plug insertion.

For related ophthalmology diagnostic coding, see our guide on CPT code 92133 for OCT scanning, which may be billed alongside dry eye evaluations when clinical documentation supports additional testing, and our guide on why the 92002-92014 eye exam codes were deleted.

What Documentation Do Payers Require for Dry Eye Claims?

Documentation is the single biggest factor in whether dry eye claims pay or deny. Across the billing companies we vet, the pattern is consistent: practices that follow a structured documentation checklist for dry eye encounters see denial rates well below the specialty average, while practices that document dry eye casually see denial rates that drag down the entire revenue cycle.

To support an H04.123 diagnosis and any associated procedures on a claim, your documentation must include:

• Symptom history. Document the patient’s specific complaints: burning, foreign body sensation, excessive tearing, light sensitivity, or blurred vision. Include symptom duration, frequency, and aggravating factors. Standardized dry eye questionnaires (OSDI, DEQ-5, or SPEED) strengthen the chart.
• Clinical findings. Record objective exam results including tear film break-up time, Schirmer test values, corneal and conjunctival staining patterns (fluorescein or lissamine green), meibomian gland assessment, and lid margin evaluation.
• Laterality confirmation. Explicitly document whether findings are present in the right eye, left eye, or both eyes. This is the direct link to selecting H04.121, H04.122, or H04.123.
• Severity assessment. Payers increasingly expect documentation of dry eye severity (mild, moderate, severe). Severity drives medical necessity for treatments beyond artificial tears, including prescription medications like cyclosporine or lifitegrast, and procedural interventions like punctal plugs.
• Treatment plan and progression. Document the treatment approach, including over-the-counter artificial tear trial (many carriers require this before authorizing prescription therapy or procedures), any prescription therapy prescribed, and the rationale for escalation to procedural intervention.
• Failed conservative therapy. Before billing CPT 68761 for punctal plugs, most Medicare Administrative Contractors (MACs) and commercial payers require documentation showing that the patient failed or showed insufficient response to conservative treatment. Without this documentation trail, punctal plug claims face a high denial rate.

According to Medicare’s Local Coverage Determination (LCD) policies for punctal occlusion (CPT 68761), carriers require a documented diagnosis of dry eye syndrome (H04.12x codes), evidence of failed conservative therapy, and objective clinical findings supporting medical necessity. The specific LCD requirements vary by MAC jurisdiction, so practices should review their regional MAC’s current policy.

Common H04.123 Billing Mistakes That Cause Denials

Dry eye is among the most frequently billed diagnoses in ophthalmology, which also makes it one of the most audited. Here are the six coding and billing errors that most commonly trigger denials on H04.123 claims:

• Submitting H04.12 instead of H04.123. The parent code H04.12 is non-billable. Every claim must use one of the four child codes (H04.121, H04.122, H04.123, or H04.129). Claims with H04.12 are rejected automatically.
• Using H04.129 (unspecified) when laterality is documented. If the exam notes state “bilateral dry eye,” coding H04.129 tells the payer you did not read your own documentation. Default to the laterality-specific code every time.
• Billing diagnostic tests separately from the exam code. Schirmer testing, TFBUT, and tear osmolarity are bundled into the E/M visit code. Billing these as standalone procedures generates duplicate payment flags and potential fraud indicators.
• Missing the conservative therapy documentation trail before punctal plug insertion. Most payers require evidence that the patient tried and failed artificial tears before they will cover CPT 68761. Without this documentation, the plug claim will deny for lack of medical necessity.
• Billing 68761 as a single line for multiple plugs. Each punctum occluded gets its own line. Two lower puncta should be billed as two units with appropriate E-modifiers (E2 and E4 for Medicare) or modifier -50 for non-Medicare bilateral procedures. One line for four plugs leaves reimbursement on the table.
• Failing to distinguish between lacrimal gland dry eye (H04.12x) and Sjogren’s-related keratoconjunctivitis (M35.01). If a patient has a documented Sjogren’s diagnosis, using H04.123 as the primary code may not trigger the appropriate coverage pathway. Sjogren’s-related dry eye may qualify for different treatment authorizations, and M35.01 should be listed as the primary diagnosis with H04.123 as secondary.

Across the billing companies we vet, practices that implement a pre-submission coding audit for dry eye encounters see a measurable reduction in denial rates within the first 60 days. The audit does not need to be complex. A simple laterality check, conservative therapy documentation confirmation, and E-modifier verification catches the majority of preventable denials.

Frequently Asked Questions

Next Steps

Billing punctal plugs? See our full guide on CPT code 68761 for punctal plug insertion.

Need ophthalmologic exam coding rules? Start with our guide on why the 92002-92014 eye exam codes were deleted and what replaced them.

Navigating 2027 Medicare changes? Read how ophthalmology Medicare cuts and modifier 25 changes affect your billing.

Ready to stop losing revenue on dry eye claims? Get matched with an ophthalmology billing partner who knows the code family and the payer rules behind it.