2026 ICD-10-CM Changes

Effective October 1, 2025, the 2026 ICD-10-CM update is live, with 480+ new codes, 38 revisions, and 28 deletions. The focus this year: sharper clinical detail, clearer guidance around genetics and social determinants of health (SDOH), and better data specificity for patient care and reimbursement.

Why this update matters:

• Greater clinical specificity and laterality
• Expanded recognition of genetic/hereditary conditions
• Better capture of SDOH
• Coding pathways for emerging diseases/treatments

Guideline Updates You'll Use Every Day

“Multiple sites” clarified:

• If documentation specifies each involved site, code each site separately.
• Use a “multiple sites” code only when the provider does not specify individual locations.

HIV coding (B20, Z21, R75) refined:

• B20: Use for HIV disease/AIDS or any HIV-related condition; once assigned, use B20 permanently.
• Z21: Asymptomatic HIV positive.
• R75: Inconclusive serology.
• Pregnancy: Sequence pregnancy codes first, then HIV status.
• New: Z29.81 for PrEP (pre-exposure prophylaxis) encounters.

New: Type 2 diabetes in remission:

• E11.A distinguishes true remission from “resolved/controlled.”
• Requires explicit provider wording: “in remission.”

Hypertension + heart disease linkage:

• If documentation links HTN with heart conditions (e.g., heart failure, myocarditis), assign I11- codes.
• If clearly unrelated, code separately. Rely on provider documentation—avoid assumptions.

Notable Code Set Changes (By Area)

Infectious diseases:

• Expanded HIV-related conditions.
• New detail for Demodex mite infestation.

Neoplasms:

• New codes for inflammatory breast cancers.
• Includes laterality and research-aligned categories.

Blood and endocrine:

• Abnormal autoantibody findings (e.g., rheumatoid factor, anti-CCP) without clinical RA.
• Hyperoxaluria now broken out (primary, secondary, dietary-related).
• Familial hypercholesterolemia split into homozygous vs heterozygous.
• Lipodystrophy subtypes, including HIV-associated.

Neurology and genetics:

• Multiple sclerosis: relapsing vs progressive, active/inactive status.
• Primary apraxia of speech: new code supports neuro/speech data capture.
• Limb-girdle muscular dystrophy: genetic-specific expansion.

Eyes/ears and congenital:

• Thyroid eye disease and secondary angle-closure glaucoma now laterality-specific.
• Usher syndrome type-specific codes.
• New codes for syndromes such as Kabuki, CTNNB1, Howell Foundation, and others.
• Neurodevelopmental disorders reflect specific gene variants (e.g., FOXG1, DLG4, SLC6A1).

Skin and ulcers:

• Chronic non-pressure ulcers (abdomen, face, arms, groin) now severity-specific.
• New codes for abscesses, contusions, puncture wounds of flank/groin/abdominal wall.

Pain and lab findings:

• Expanded abdominal and flank pain with laterality.
• R11.16: Cannabis hyperemesis syndrome.
• Costovertebral angle tenderness added.
• Codable abnormal immunologic labs even without a definitive diagnosis.

External causes and SDOH:

• New external-cause detail (e.g., fishing-hook piercings, sharp objects via orifices).
• Additions for Gulf War illness/war-related exposures.
• Clearer capture of prophylactic surgeries (even without family history).
• New Z codes for financial insecurity and utility access.

Action Checklist for Coding Leaders

To comply with the recent changes, be sure to:

• Update charge masters, problem lists, EHR pick-lists, and templates.
• Educate providers to use phrases like “in remission,” site-specific detail, and explicit HTN-heart links.
• Tune CDI queries for HIV status, diabetes remission, “multiple sites,” and ulcer severity.
• Audit hot spots early (HIV status sequencing, E11.A use, I11- linkage, SDOH Z-codes).
• Refresh training: Share quick guides and example notes that meet new specificity.

Quick reminders:

• Once B20, always B20.
• E11.A requires documented remission—not just “controlled.”
• Don't default to “multiple sites” when documentation lists distinct locations.
• Use SDOH Z-codes when clearly documented and relevant to care.

Bottom Line

2026 continues the push toward precision. Pair clear provider documentation with the new options (remission, genetic variants, SDOH, laterality/severity) to protect reimbursement and improve data quality.

BC Advantage Magazine: BC Advantage is the largest independent resource provider in the industry for Medical Coders, Medical Billers, Healthcare Auditors, Practice Managers, Compliance Officers, and Documentation Experts.