A21.1 is a billable and specific ICD-10-CM code. Accurate documentation of A21.1 facilitates proper diagnosis, effective management, and correct reimbursement.
This guideline will provide the use, official coding guidelines, and historical background of A21.1.
What is the ICD-10-CM Diagnosis Code for Oculoglandular tularemia?
The ICD-10-CM diagnosis code for Oculoglandular tularemia is A21.1.
Tularemia is a rare but serious infectious disease caused by the bacterium Francisella tularensis. It is often transmitted to humans through tick or deer fly bites, contact with infected animals, or contaminated food, water, or air.
Oculoglandular tularemia is a rare form of tularemia caused by Francisella tularensis entering the eye.
It usually happens when contaminated hands, water, or materials touch the eye. Symptoms include eye redness, pain, swelling, tearing, and sensitivity to light.
The nearby lymph nodes, especially in front of the ear, may become swollen and tender. It can also cause fever and general weakness.
Diagnosis is made through eye exam and lab tests. Treatment includes antibiotics such as streptomycin, gentamicin, or doxycycline. Early treatment is important to prevent eye damage and promote full recovery.
Proper documentation using A21.1 ensures patients receive appropriate care and enables accurate healthcare reimbursement.
History Background of ICD-10-CM Diagnosis Code A21.1
The ICD-9-CM system, first introduced in 1979, provided the initial framework for coding diseases and health-related conditions in the United States.
The ICD-9-CM diagnosis code for Oculoglandular tularemia was 021.3.This coding remained consistent from 1979 to 2015.
While the ICD-9-CM system offered a basic approach to disease classification, modern healthcare needs more detail and specificity.
To address this, the ICD-10-CM system was launched in 2015, introducing a more comprehensive and accurate coding structure.
The transition from ICD-9-CM to ICD-10-CM significantly improved the ability to document and analyze conditions such as Oculoglandular tularemia.
The 2025 edition of ICD-10-CM A21.1 became effective on October 1, 2024.
| Year | ICD-10-CM Code | Description |
| 2020 | A21.1 | No Change |
| 2021 | A21.1 | No Change |
| 2022 | A21.1 | No Change |
| 2023 | A21.1 | No Change |
| 2024 | A21.1 | No Change |
| 2025 | A21.1 | No Change |
Other ICD-10-CM Diagnosis Codes in A21
ICD-10-CM code A21 | Tularemia has following sub categories including A21.1 :
- A21 Tularemia.
- A21.0 Ulceroglandular tularemia
- A21.1 Oculoglandular tularemia
- A21.2 Pulmonary tularemia
- A21.3 Gastrointestinal tularemia
- A21.7 Generalized tularemia
- A21.8 Other forms of tularemia
- A21.9 Tularemia, unspecified
Final Thoughts
Proper coding of A21.1 is essential for diagnosing and managing Oculoglandular tularemia. A clear understanding of its History, and correct usage enhances medical documentation and ensures effective treatment, patient care, supports healthcare planning, and guarantees proper reimbursement for medical services.
