2026 ICD-10-CM Diagnosis Code A56.11

Chlamydial female pelvic inflammatory disease

ICD-10-CM Code:: A56.11
ICD-10 Code for:: Chlamydial female pelvic inflammatory disease
Is Billable?: Yes - Valid for Submission
Chronic Condition Indicator: ^[1]: Not chronic
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A56.11 is a billable diagnosis code used to specify a medical diagnosis of chlamydial female pelvic inflammatory disease. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

Table of Contents

Code Information
Approximate Synonyms
Clinical Classification
Tabular List of Diseases and Injuries
Index to Diseases and Injuries References
Diagnostic Related Groups Mapping
Convert to ICD-9 Code
Patient Education
Other Codes Used Similar Conditions
Code History

Code Classification

Certain infectious and parasitic diseases
A00–B99
- Infections with a predominantly sexual mode of transmission
  A50-A64
  - Other sexually transmitted chlamydial diseases
    A56

Approximate Synonyms

The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.

Chlamydia trachomatis infection of genital structure
Chlamydia trachomatis infection of genital structure
Chlamydial pelvic inflammatory disease
Chlamydial pelvic inflammatory disease
Chlamydial salpingitis
Fallopian tube infection
Infection of cervix caused by Chlamydia trachomatis
Infertility due to infection
Pelvic inflammation with female sterility caused by Chlamydia trachomatis

Clinical Classification

Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.

They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.

Inflammatory diseases of female pelvic organs

CCSR Code: GEN018

Inpatient Default: N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.

Sexually transmitted infections (excluding HIV and hepatitis)

CCSR Code: INF010

Inpatient Default: Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.

Outpatient Default: Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

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).

- Chlamydia, chlamydial - A74.9
- - endometritis - A56.11
- - female
  - - pelvic inflammatory disease - A56.11
  - - pelviperitonitis - A56.11
- - salpingitis - A56.11

- Disease, diseased - See Also: Syndrome;
- - pelvis, pelvic
  - - inflammatory (female) - N73.9
    - - chlamydial - A56.11

- Endometritis (decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative) - N71.9
- - chlamydial - A56.11

- Salpingitis (catarrhal) (fallopian tube) (nodular) (pseudofollicular) (purulent) (septic) - N70.91
- - chlamydial - A56.11

Index of External Cause of Injuries

References found for this diagnosis code in the External Cause of Injuries Index:

Chlamydia, chlamydial

endometritis

Chlamydia, chlamydial

female

pelvic inflammatory disease

Chlamydia, chlamydial

female

pelviperitonitis

Chlamydia, chlamydial

salpingitis

Disease, diseased

pelvis, pelvic

inflammatory (female)

chlamydial

Endometritis(decidual) (nonspecific) (purulent) (senile) (atrophic) (suppurative)

chlamydial

Salpingitis(catarrhal) (fallopian tube) (nodular) (pseudofollicular) (purulent) (septic)

chlamydial

Convert A56.11 to ICD-9-CM

Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.

Oth VD chlm trch oth gu

ICD-9-CM: 099.54

Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.

View Conversion

Fem pelv inflam dis NOS

ICD-9-CM: 614.9

View Conversion

Patient Education

Chlamydia Infections

What is chlamydia?

Chlamydia is a common sexually transmitted infection (STI). 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. Chlamydia can also be passed 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 STI. If you are pregnant, you should get a test when you go to your 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 STI
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]

Pelvic Inflammatory Disease

What is pelvic inflammatory disease?

Pelvic inflammatory disease (PID) is an infection of the uterus, ovaries, and other female reproductive organs. PID causes scarring in these organs. This can lead to infertility, ectopic pregnancy, pelvic pain, abscesses (a collection of pus), and other serious problems. PID is the most common preventable cause of infertility in the United States.

What causes pelvic inflammatory disease?

Many types of bacteria can cause PID, but it's often caused by sexually transmitted infections (STIs). Gonorrhea and chlamydia are the most common causes of PID.

You are at greater risk for PID if you:

Are sexually active and younger than age 25.
Have more than one sex partner.
Douche. Douching can push bacteria into your reproductive organs. It may also hide the signs of PID.
Have an STI and do not get treated.
Have had PID or an STI before.

It's not as common, but sometimes using an intrauterine device (IUD) for birth control can increase your risk for PID. However, your risk is usually only during the first three weeks after the IUD is placed inside your uterus.

What are the symptoms of pelvic inflammatory disease?

If you have PID, you may have mild or no symptoms. If you do have symptoms, the most common symptom is pain in the lower abdomen (belly). Other symptoms can include:

Fever
Foul-smelling vaginal discharge
Bleeding between periods
Pain or bleeding during sex
Painful urination (peeing)

See your health care provider if you have any symptoms of PID or if you think you or your partner were exposed to an STI. Early treatment is important. Waiting too long for treatment increases the risk of infertility.

How is pelvic inflammatory disease diagnosed?

There is no one test for PID. To check for PID, your provider may:

Ask about your medical and sexual history
Review your symptoms
Do a pelvic exam
Order blood, urine, and imaging tests

What is the treatment for pelvic inflammatory disease?

Antibiotics are used to treat PID. You must take all the medicine, even if your symptoms go away to make sure the infection is cured. You will likely need to follow up with your provider to make sure the treatment is working.

Tell your recent sex partner(s) so they can get tested and treated. Don't have sex until you finish treatment, otherwise you can reinfect each other.

If you're pregnant, have an abscess, or your symptoms don't go away, you may need to have surgery or be hospitalized for treatment.

Treatment cannot fix any permanent damage already done to your internal organs.

If you don't get treated, complications can occur, such as:

Scar tissue may develop in your fallopian tubes.
Infertility.
An abscess may develop in your reproductive organs. If untreated, this could become a life-threatening infection.
Long-term pelvic or abdominal (belly) pain.

Can pelvic inflammatory disease be prevented?

The best way to protect yourself against STIs is not to have sex.

If you do decide to have sex, a few ways you can lower your risk include to:

Practice safe sex by using a condom every time you have sex, limit your number of sex partners, and ask your partners about their sexual history.
Get tested for chlamydia and gonorrhea every year and ask your partner to get tested.
Don't douche since this can upset the balance of bacteria in your vagina.