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.