2024 ICD-10-CM Diagnosis Code A55

Chlamydial lymphogranuloma (venereum)

ICD-10-CM Code:
ICD-10 Code for:
Chlamydial lymphogranuloma (venereum)
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    • Infections with a predominantly sexual mode of transmission
      • Chlamydial lymphogranuloma (A55)

A55 is a billable diagnosis code used to specify a medical diagnosis of chlamydial lymphogranuloma (venereum). The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Chlamydial dermatological disorders
  • Chlamydial dermatological disorders
  • Chlamydial dermatological disorders
  • Chlamydial dermatological disorders
  • Chlamydial dermatological disorders
  • Chronic acquired lymphedema
  • Chronic disease of lymphatic vessels
  • Early lymphogranuloma venereum
  • Esthiomene
  • Infectious edema
  • Late lymphogranuloma venereum
  • Latent lymphogranuloma venereum
  • Lymphedema due to infection
  • Lymphedema due to lymphogranuloma venereum
  • Lymphogranuloma venereum
  • Venereal disease due to Chlamydia trachomatis
  • Venereal disease due to Chlamydia trachomatis
  • Venereal disease due to Chlamydia trachomatis
  • Venereal disease due to Chlamydia trachomatis
  • Venereal disease due to Chlamydia trachomatis

Clinical Classification

Clinical Information

  • Lymphogranuloma Venereum

    subacute inflammation of the inguinal lymph glands caused by certain immunotypes of chlamydia trachomatis. it is a sexually transmitted disease in the u.s. but is more widespread in developing countries. it is distinguished from granuloma venereum (see granuloma inguinale), which is caused by calymmatobacterium granulomatis.
  • Lymphogranuloma Venereum

    infection with the organism mycobacterium.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Climatic or tropical bubo
  • Durand-Nicolas-Favre disease
  • Esthiomene
  • Lymphogranuloma inguinale

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert A55 to ICD-9-CM

  • ICD-9-CM Code: 099.1 - Lymphogranuloma venereum

Patient Education

Chlamydia Infections

What is chlamydia?

Chlamydia is a common sexually transmitted disease (STD). It is caused by bacteria called Chlamydia trachomatis. Anyone can get chlamydia. It often doesn't cause symptoms, so people may not know that they have it. Antibiotics can cure it. But if it's not treated, chlamydia can cause serious health problems.

How is chlamydia spread?

You can get chlamydia during oral, vaginal, or anal sex with someone who has chlamydia. A pregnant person can also pass chlamydia to the baby during childbirth.

If you've had chlamydia and were treated in the past, you can get re-infected if you have unprotected sex with someone who has it.

Who is more likely to get chlamydia?

Chlamydia is more common in young people, especially young women. You are more likely to get infected with chlamydia if you don't consistently use a condom or if you have multiple partners.

What are the symptoms of chlamydia?

Chlamydia doesn't usually cause any symptoms. So you may not realize that you have it. But even if you don't have symptoms, you can still pass the infection to others.

If you do have symptoms, they may not appear until several weeks after you have sex with someone who has chlamydia.

Symptoms in women include:

  • Abnormal vaginal discharge, which may have a strong smell
  • A burning sensation when urinating

If the infection spreads, you might get lower abdominal (belly) pain, pain during sex, nausea, and fever.

Symptoms in men include:

  • Discharge from your penis
  • A burning sensation when urinating (peeing)
  • Pain and swelling in one or both testicles (although this is less common)

If the chlamydia infects the rectum (in men or women), it can cause rectal pain, discharge, and bleeding.

How is chlamydia diagnosed?

There are lab tests to diagnose chlamydia. Your health care provider may ask you to provide a urine sample. Or your provider may use (or ask you to use) a cotton swab to get a sample from your vagina to test for chlamydia.

Who should be tested for chlamydia?

You should go to your provider for a test if you have symptoms of chlamydia or if you have a partner who has an STD. Pregnant people should get a test when they go to their first prenatal visit.

People at higher risk should get checked for chlamydia every year:

  • Sexually active women 25 and younger
  • Older women who have new or multiple sex partners or a sex partner who has an STD
  • Men who have sex with men (MSM)

What other problems can chlamydia cause?

In women, an untreated infection can spread to your uterus and fallopian tubes, causing pelvic inflammatory disease (PID). PID can cause permanent damage to your reproductive system. This can lead to long-term pelvic pain, infertility, and ectopic pregnancy. Women who have had chlamydia infections more than once are at higher risk of serious reproductive health complications.

Men often don't have health problems from chlamydia. Sometimes it can infect the epididymis (the tube that carries sperm). This can cause pain, fever, and, rarely, infertility.

Both men and women can develop reactive arthritis because of a chlamydia infection. Reactive arthritis is a type of arthritis that happens as a "reaction" to an infection in the body.

Babies born to infected mothers can get eye infections and pneumonia from chlamydia. It may also make it more likely for your baby to be born too early.

Untreated chlamydia may also increase your chances of getting or giving HIV.

What are the treatments for chlamydia?

Antibiotics will cure the infection. You may get a one-time dose of the antibiotics, or you may need to take medicine every day for 7 days. It is important to take all the medicine that your provider prescribed for you. Antibiotics cannot repair any permanent damage that the disease has caused.

To prevent spreading the disease to your partner, you should not have sex until the infection has cleared up. If you got a one-time dose of antibiotics, you should wait 7 days after taking the medicine to have sex again. If you have to take medicine every day for 7 days, you should not have sex again until you have finished taking all of the doses of your medicine.

It is common to get a repeat infection, so you need to get tested again about three months after treatment.

Can chlamydia be prevented?

The only sure way to prevent chlamydia is to not have vaginal, anal, or oral sex.

Correct usage of latex condoms greatly reduces, but does not eliminate, the risk of catching or spreading chlamydia. If your or your partner is allergic to latex, you can use polyurethane condoms.

Centers for Disease Control and Prevention

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[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.