MCMedicalCodingSoftware
E84.9

E84.9: Cystic fibrosis, unspecified

Billable / specific codeICD-10-CM

E84.9 is a billable, specific ICD-10-CM code for cystic fibrosis, unspecified. It is valid for submission on a claim.

Check E84.9 with the rest of the claim: free scrubber

Other codes that can never be billed with E84.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • P78Other perinatal digestive system disorders
  • Q45.3Other congenital malformations of pancreas and pancreatic duct

Risk adjustment

E84.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 277 Cystic Fibrosis0.998 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

E84.9 is named in 12 Medicare coverage policies: 10 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A52494High Frequency Chest Wall Oscillation Devices - Policy Article
  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

Alphabetic index entries that lead here

  • Mucoviscidosis
  • Fibrosis, fibrotic›cystic(of pancreas)
  • Disease, diseased›pancreas›fibrocystic
  • Fibrocystic›disease›pancreas
  • Jaundice›newborn›due to or associated with›mucoviscidosis

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under E84

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.