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  6. 2025 ICD-10-CM Code R73.03

2025 ICD-10-CM Diagnosis Code R73.03

Prediabetes

ICD-10-CM Code:
R73.03
ICD-10 Code for:
Prediabetes
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

R73.03 is a billable diagnosis code used to specify a medical diagnosis of prediabetes. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.

According to ICD-10-CM guidelines this code should not to be used as a principal diagnosis code when a related definitive diagnosis has been established.

Code Classification

  • Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
    R00–R99
    • Abnormal findings on examination of blood, without diagnosis
      R70-R79
      • Elevated blood glucose level
        R73

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.

  • Prediabetes
  • Prediabetes
  • Prediabetes in mother during pregnancy

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.

Abnormal findings without diagnosis

CCSR Code: SYM017

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.

Replaced Code

This code was replaced in the 2025 ICD-10-CM code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2024. This code was replaced for the FY 2025 (October 1, 2024 - September 30, 2025).


  • E10.A0 - Type 1 diabetes mellitus, presymptomatic, unspecified
  • E10.A1 - Type 1 diabetes mellitus, presymptomatic, Stage 1
  • E10.A2 - Type 1 diabetes mellitus, presymptomatic, Stage 2

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.
  • Latent diabetes

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).

Replacement Code

R7303 replaces the following previously assigned ICD-10-CM code(s):

  • R73.09 - Other abnormal glucose

Convert R73.03 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.

Abnormal glucose NEC

ICD-9-CM: 790.29

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

Patient Education


Prediabetes

What is prediabetes?

Prediabetes means that your blood glucose, or blood sugar, levels are higher than normal but not high enough to be called diabetes. Glucose comes from the foods you eat. Too much glucose in your blood can damage your body over time.

If you have prediabetes, you are more likely to develop type 2 diabetes, heart disease, and stroke. But if you make some lifestyle changes now, you may be able to delay or prevent type 2 diabetes.

What causes prediabetes?

Prediabetes usually happens when your body has a problem with insulin. Insulin is a hormone that helps the glucose get into your cells to give them energy. A problem with insulin could be:

  • Insulin resistance, a condition in which the body can't use its insulin properly. It makes it hard for your cells to get glucose from your blood. This can cause your blood sugar levels to rise.
  • Your body can't make enough insulin to keep your blood sugar levels at a healthy level

Researchers think that being overweight and not getting regular physical activity are major factors in causing prediabetes.

Who is at risk for prediabetes?

About 1 out of every 3 adults has prediabetes. It is more common in people who:

  • Are overweight or have obesity
  • Are age 45 or older
  • Have a parent, brother, or sister with diabetes
  • Are African American, Alaska Native, American Indian, Asian American, Hispanic/Latino, Native Hawaiian, or Pacific Islander American
  • Are not physically active
  • Have health conditions such as high blood pressure and high cholesterol
  • Have had gestational diabetes (diabetes in pregnancy)
  • Have a history of heart disease or stroke
  • Have metabolic syndrome
  • Have polycystic ovary syndrome (PCOS)

What are the symptoms of prediabetes?

Most people don't know they have prediabetes because usually there are no symptoms.

Some people with prediabetes may have darkened skin in the armpit or on the back and sides of the neck. They may also have many small skin growths in those same areas.

How is prediabetes diagnosed?

There are a few different blood tests that can diagnose prediabetes. The most common ones are:

  • Fasting plasma glucose (FPG) test, which measures your blood sugar at a single point in time. You need to fast (not eat or drink) for at least 8 hours before the test. The results of the test are given in mg/dL (milligrams per deciliter):
    • A normal level is 99 or below
    • Prediabetes is 100 to 125
    • Type 2 diabetes is 126 and above
  • A1C test, which measures your average blood sugar over the past 3 months. The results of an A1C test are given as a percentage. The higher the percentage, the higher your blood sugar levels have been.
    • A normal level is below 5.7%
    • Prediabetes is between 5.7 to 6.4%
    • Type 2 diabetes is above 6.5%

If I have prediabetes, will I get diabetes?

If you have prediabetes, you may be able to delay or prevent type 2 diabetes through lifestyle changes:

  • Losing weight, if you are overweight
  • Getting regular physical activity
  • Following a healthy, reduced-calorie eating plan

In some cases, your health care provider may also recommend taking diabetes medicines.

Can prediabetes be prevented?

If you are at risk for prediabetes, those same lifestyle changes (losing weight, regular physical activity, and a healthy eating plan) may prevent you from getting it.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


[Learn More in MedlinePlus]

Diabetes Tests & Diagnosis

Learn when you should get a diabetes test, which tests you may need, and how to prepare for each test.
[Learn More in MedlinePlus]

Insulin Resistance & Prediabetes

Learn about the causes of insulin resistance and prediabetes, how prediabetes is diagnosed, and steps you can take to help prevent or reverse these conditions.
[Learn More in MedlinePlus]

Risk Factors for Type 2 Diabetes

Risk factors for developing type 2 diabetes include overweight, lack of physical activity, history of other diseases, age, race, and ethnicity.
[Learn More in MedlinePlus]

What Is Diabetes?

Diabetes occurs when your blood glucose is too high, which can lead to health problems. The main types of diabetes are type 1, type 2, and gestational.
[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

Footnotes

[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.