ICD-10-CM Diagnosis Code A07.1: Giardiasis [Lambliasis]

A07.1 is a billable and specific ICD-10-CM code. Accurate documentation of A07.1 facilitates proper diagnosis, effective management, and correct reimbursement.

This guideline will provide the use, official coding guidelines, and historical background of A07.1.

What is the ICD-10-CM Diagnosis Code for Giardiasis [Lambliasis]?

The ICD-10-CM diagnosis code for Giardiasis [Lambliasis] is A07.1.

Giardiasis is a common intestinal infection caused by the Giardia parasite. It spreads through unsafe water, food, or contact with infected people.

Symptoms include cramps, bloating, nausea, and watery diarrhea. It can last for weeks and may lead to lasting stomach issues if not treated.

Proper documentation using A07.1 ensures patients receive appropriate care and enables accurate healthcare reimbursement.

History Background of ICD-10-CM Diagnosis Code A07.1

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 Giardiasis [Lambliasis] is 007.1.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 Giardiasis [Lambliasis].

The 2025 edition of ICD-10-CM A07.1 became effective on October 1, 2024.

Year	ICD-10-CM Code	Description
2020	A07.1	No Change
2021	A07.1	No Change
2022	A07.1	No Change
2023	A07.1	No Change
2024	A07.1	No Change
2025	A07.1	No Change

Other ICD-10-CM Diagnosis Codes in A07

ICD-10-CM code A07 | Other protozoal intestinal diseases has following sub categories including A07.1 :

A07.0 Balantidiasis.
A07.1 Giardiasis [lambliasis].
A07.2 Cryptosporidiosis.
A07.3 Isosporiasis.
A07.4 Cyclosporiasis.
A07.8 Other specified protozoal intestinal diseases.
A07.9 Protozoal intestinal disease, unspecified.

Final Thought

Proper coding of A07.1 is essential for diagnosing and managing Giardiasis [lambliasis]. 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.

Dr. Sehrish Bano, CPB & CPC

As a certified professional in both billing and coding, I specialize in streamlining healthcare revenue cycles and ensuring accurate claim submissions. With more than five years of experience serving the healthcare industry in the USA, I bring expertise in coding accuracy, compliance, and reimbursement optimization. My work focuses on reducing errors, improving efficiency, and supporting providers in delivering quality care without administrative hurdles. I am committed to helping healthcare organizations achieve financial stability and compliance through reliable billing and coding practices.