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Official Description

Ophthalmic mucous membrane tests

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

Ophthalmic mucous membrane tests, commonly referred to as conjunctival challenge tests, are diagnostic procedures designed to identify specific allergens that impact the mucous membrane of the eye. During this test, an allergenic extract is introduced into the conjunctival sac, which is the thin membrane covering the front of the eye and the inner eyelids. The primary objective of these tests is to provoke an allergic response, allowing for the assessment of symptoms such as redness, itchiness, tearing, and other reactions that may indicate an allergy. It is important to note that multiple allergens can be tested simultaneously, providing a comprehensive evaluation of potential sensitivities. Following the test, the physician carefully observes and evaluates any symptoms that arise in response to each allergen, ultimately compiling a detailed written report of the findings to guide further management and treatment of the patient's allergic conditions.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The ophthalmic mucous membrane tests are indicated for the evaluation of patients who exhibit symptoms suggestive of allergic conjunctivitis or other allergic reactions affecting the eyes. These symptoms may include:

  • Redness of the eyes - A common sign of irritation or allergic response.
  • Itchiness - Patients may experience significant discomfort due to itching, which is often associated with allergies.
  • Tearing - Excessive tearing can occur as a reaction to allergens affecting the mucous membranes.
  • Other allergic symptoms - This may include swelling, discharge, or a sensation of grittiness in the eyes.

2. Procedure

The procedure for conducting ophthalmic mucous membrane tests involves several key steps to ensure accurate identification of allergens. The following outlines the procedural steps:

  • Preparation of the patient - The patient is first informed about the procedure, including its purpose and what to expect. Informed consent is obtained prior to proceeding with the test.
  • Selection of allergens - The physician selects one or more allergenic extracts to be tested based on the patient's history and symptoms. These extracts are typically derived from common allergens known to cause ocular allergic reactions.
  • Administration of the allergenic extract - The selected allergenic extract is carefully placed into the conjunctival sac of one eye. This is done using a sterile technique to minimize the risk of infection or contamination.
  • Observation for reactions - After the allergen is administered, the physician monitors the eye for any signs of an allergic response. This includes assessing for redness, swelling, tearing, and itchiness at specified intervals.
  • Documentation of findings - The physician evaluates the symptoms that occur in response to each allergen and documents the findings meticulously. This documentation is crucial for understanding the patient's allergic profile and for future management.

3. Post-Procedure

Post-procedure care for patients undergoing ophthalmic mucous membrane tests typically involves monitoring for any delayed allergic reactions. Patients may be advised to avoid rubbing their eyes and to report any significant discomfort or worsening of symptoms. The physician will provide a written report detailing the findings of the test, which may include recommendations for further allergy testing or treatment options based on the identified allergens. Follow-up appointments may be scheduled to discuss the results and to develop a comprehensive management plan for the patient's allergic conditions.

Short Descr OPH MUCOUS MEMBRANE TESTS
Medium Descr OPHTHALMIC MUCOUS MEMBRANE TESTS
Long Descr Ophthalmic mucous membrane tests
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 3 - Technical Component Only Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 03 - Procedure must be performed under the personal supervision of physician.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator STV-Packaged Codes
Type of Service (TOS) 1 - Medical Care
Berenson-Eggers TOS (BETOS) T2D - Other tests - other
MUE 1
CCS Clinical Classification 173 - Other diagnostic procedures on skin and subcutaneous tissue
RT Right side (used to identify procedures performed on the right side of the body)
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
LT Left side (used to identify procedures performed on the left side of the body)
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
GC This service has been performed in part by a resident under the direction of a teaching physician
GW Service not related to the hospice patient's terminal condition
GZ Item or service expected to be denied as not reasonable and necessary
Date
Action
Notes
2025-01-01 Changed Short Description changed.
Pre-1990 Added Code added.
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