ICD-10-CM Diagnosis Code O26.879 - Cervical shortening, unspecified trimester (original) (raw)

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ICD List 2025-2026 Edition

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Cervical shortening, unspecified trimester

ICD-10-CM Code:

O26.879

ICD-10 Code for:

Cervical shortening, unspecified trimester

Is Billable?

Yes - Valid for Submission

Chronic Condition Indicator: [1]

Not chronic

Code Navigator:

O26.879 is a billable diagnosis code used to specify a medical diagnosis of cervical shortening, unspecified trimester. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2025 through September 30, 2026.

The code O26.879 is applicable to female patients aged 12 through 55 years inclusive. It is clinically and virtually impossible to use this code on a non-female patient outside the stated age range.

This medical diagnosis code is frequently used in OB/GYN medical specialties to designate conditions such maternal disorders related to pregnancy.

Unspecified diagnosis codes like O26.879 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

  1. Code Information
  2. Approximate Synonyms
  3. Clinical Classification
  4. Tabular List of Diseases and Injuries
  5. Code Edits
  6. Diagnostic Related Groups Mapping
  7. Convert to ICD-9 Code
  8. Patient Education
  9. Other Codes Used Similar Conditions
  10. Code History

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.

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.

CCSR Code: PRG011

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.

The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.

The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).

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.

ICD-9-CM: 649.70

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.

Cervix Disorders

What is a cervix disorder?

A cervix disorder is a problem with your cervix. The cervix is part of the female reproductive system. It is the lower, narrow end of the uterus (womb), which opens into the vagina (birth canal). The cervix has a small opening that expands during childbirth. It also allows menstrual blood to leave your body.

You may not have any symptoms of a cervix disorder, but routine pelvic exams and a Pap smear test can help determine if you may need treatment.

Cervix disorders can include:

Who is more likely to develop cervix disorders?

You are more likely to develop a cervix disorder if:

What are the symptoms of cervix disorders?

You may not know that something is wrong since cervix disorders may not have any symptoms. If you have symptoms, they may vary based on the cervix disorder.

Symptoms can include:

If you are pregnant, a few signs of an incompetent cervix could include light vaginal bleeding, a feeling of pelvic pressure, or mild cramps. But you may not have any signs.

How are cervix disorders diagnosed?

Even if you don't have symptoms, your health care provider may notice changes to the cells of your cervix during a pelvic exam. Your provider may look for:

Your provider may perform a Pap test to look for changes in your cervix.

What are the treatments for cervix disorders?

The treatment for cervix disorders depends on the cause. It might include antibiotics or stopping using a product that causes skin irritation.

If you have had an incompetent cervix in the past, you might take medicine or have ultrasound imaging tests to check how your pregnancy is going.

Can cervix disorders be prevented?

You can take steps to prevent some cervix disorders. This can include to:

[Learn More in MedlinePlus]

Health Problems in Pregnancy

What are health problems in pregnancy?

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

But just because you have health problems, it doesn't mean that you, or your fetus, will have a problem during the pregnancy. Taking care of yourself and getting early and regular prenatal care from a health care provider may help you reduce pregnancy risks from health problems.

What raises my risk for health problems during pregnancy?

Every pregnancy has some risk of problems, but your lifestyle, as well as factors like certain conditions and health issues, can raise that risk, such as:

Any of these can affect your health, the health of your fetus, or both.

Can chronic health conditions cause problems in pregnancy?

Every pregnancy is different. If you have specific risks in one pregnancy, it doesn't mean that you will have them in another. But, if you have a chronic condition, you should talk to your provider about how to minimize your risk before you get pregnant. Once you are pregnant, you may need a health care team to monitor your pregnancy. Some common conditions that can complicate a pregnancy include:

Other conditions that may make pregnancy risky can develop during pregnancy - for example, gestational diabetes and Rh incompatibility.

Can health problems in pregnancy be prevented?

You may be able to lower your risk of certain health problems by making healthy lifestyle changes before you get pregnant. These can include reaching a healthy weight, not smoking, and managing any health conditions.

However, health problems during pregnancy are not always preventable. Some chronic conditions can be treated and controlled, while others aren't treatable and carry a higher risk than usual, even if the health problem is well-managed.

Share your symptoms with your provider for early detection and treatment of health problems. Sometimes, it's hard to know what's normal. Some symptoms, like nausea, back pain, and fatigue, are common during pregnancy, while other symptoms, like vaginal bleeding or a severe or long-lasting headache, can be signs of a problem. Call your provider to let them know if something is bothering or worrying you.

[Learn More in MedlinePlus]