The Center for Medicare and Medicaid Services has released the FY 2025 updates to the ICD-10-CM code classification. There are fewer new codes this year compared to last year, but many interesting new codes are being added.
| Year | New Codes | Deleted Codes | Revised Code Titles |
| 2025 | 252 | 34 | 13 |
| 2024 | 395 | 25 | 13 |
This this table show the breakdown of code updates by chapter of ICD-10-CM.
| ICD-10-CM Chapter | New | Revised | Invalid |
| Chapter 1: Certain Parasitic and Infectious Diseases | 0 | 1 | 0 |
| Chapter 2: Neoplasms | 63 | 0 | 14 |
| Chapter 3: Diseases of the Blood and Blood Forming Organs | 1 | 0 | 0 |
| Chapter 4: Endocrine, Nutritional and Metabolic Diseases | 16 | 0 | 0 |
| Chapter 5: Mental, Behavioral and Neurodevelopmental Disorders | 26 | 1 | 4 |
| Chapter 6: Diseases of the Nervous System | 7 | 1 | 1 |
| Chapter 7: Diseases of the Eye and Adnexa | 0 | 5 | 0 |
| Chapter 8: Diseases of the Ear and Mastoid Process | 0 | 0 | 0 |
| Chapter 9: Diseases of Circulatory System | 4 | 2 | 0 |
| Chapter 10: Diseases of the Respiratory System | 7 | 0 | 0 |
| Chapter 11: Diseases of the Digestive System | 27 | 1 | 3 |
| Chapter 12: Diseases of the Skin and Subcutaneous Tissue | 8 | 0 | 3 |
| Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue | 33 | 0 | 3 |
| Chapter 14: Diseases of the Genitourinary System | 0 | 0 | 0 |
| Chapter 15: Pregnancy, Childbirth and the Puerperium | 0 | 0 | 0 |
| Chapter 16: Certain Conditions Originating in the Perinatal Period | 0 | 0 | 0 |
| Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities | 4 | 1 | 1 |
| Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified | 1 | 0 | 0 |
| Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes | 30 | 0 | 3 |
| Chapter 20: External Causes of Morbidity | 0 | 0 | 0 |
| Chapter 21: Factors Influencing Health Status and Contact with Health Services | 25 | 1 | 2 |
| Chapter 22: Codes for Special Purposes | 0 | 0 | 0 |
| Total | 252 | 13 | 34 |
The updates to the ICD-10-CM Official Guidelines for Coding and Reporting are minimal for 2025. Most of the updates are necessary just to maintain consistency in how things are referenced in the guidelines based on the addition of new codes.
For example, the title of category Z17 has been expanded to Estrogen, and other hormones and factors receptor status. This title change means guideline II.C.21.c.3 had to be updated for consistency.
3) Status
Z17 Estrogen, and other hormones and factors receptor status
Z18 Retained foreign body fragments
Z19 Hormone sensitivity malignancy status
However, there is one completely new guideline, I.C.4.a.1.(a) Presymptomatic Type 1 Diabetes Mellitus being added related to the addition of new codes to report presymptomatic type 1 diabetes mellitus. The new guideline simply indicates that codes from subcategory E10.A- are assigned for early-stage, type 1 diabetes that predates the onset of diabetic symptoms.
1) Type of diabetes
The age of a patient is not the sole determining factor, though most type 1 diabetics develop the condition before reaching puberty. For this reason, type 1 diabetes mellitus is also referred to as juvenile diabetes.
(a) Presymptomatic Type 1 Diabetes Mellitus Codes E10.A-, Type 1 diabetes mellitus, presymptomatic, are assigned for early-stage type 1 diabetes that predates the onset of symptoms.
Most of the entries added to or deleted from the index are related to the addition of new codes or the addition of new inclusion terms being added under some codes. There are several instances though where the index has changed the code directed for use by a particular search of the index or added search terms leading to a more specific code but not due to the introduction of a new code.
Examples:
When the terms Tumor, stromal, gastric and malignant are searched, the index previously directed the assignment of code C16.9 Malignant neoplasm stomach, unspecified. The index now directs assignment of code C49.A2 Gastrointestinal stromal tumor of stomach.
No Change Tumor - see also Neoplasm, unspecified behavior, by site
Revise from - - - malignant C16.9
Revise to - - - malignant C49.A2
A subterm has been added providing the option to specify rupture of the globe of the eye as nontraumatic.
No Change Rupture, ruptured
No Change - globe (eye) (traumatic) - see Injury, eye, laceration
Add - - nontraumatic (see also Disorder, globe) H44.89
Subterms have been added providing the option to specify stenosis/stricture of the celiac artery as arterio/atherosclerotic.
No Change Stenosis, stenotic (cicatricial) - see also Stricture
No Change - artery NEC (see also Arteriosclerosis) I77.1
Revise from - - celiac I77.4
Revise to - - celiac (compression) I77.4
Add - - - arteriosclerotic I70.8
Add - - - atherosclerosis I70.8
No Change Stricture - see also Stenosis
No Change - artery I77.1
Revise from - - celiac I77.4
Revise to - - celiac (compression) I77.4
Add - - - arteriosclerotic I70.8
Add - - - atherosclerosis I70.8
Subterms have been added providing the option to specify thoracic outlet syndrome as arterial or venous.
No Change Syndrome - see also Disease
No Change - thoracic outlet (compression) G54.0
Add - - arterial I77.89
Add - - neurogenic G54.0
Add - - venous I87.1
The greatest number of updates to ICD-10-CM for 2025 were made within the Tabular List. Updates consist primarily of adding new codes or expanding existing codes to provider greater specificity, but there were also a notable number of updates to instructional notes, such as the addition of Code first, Code Also and Use Additional Code notes, and Excludes 1 notes being changed to Excludes 2 notes. When coders begin assigning codes on October 1, 2024, it is recommended to pay particular attention to reviewing any relevant instructional notes in the Tabular List for applicable changes.
The list below highlights some of the significant 2025 updates to ICD-10-CM by chapter.
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The information contained in this coding advice is valid at the time of posting. Viewers are encouraged to research subsequent official guidance in the areas associated with the topic as they can change rapidly.