E84.9 — Cystic fibrosis, unspecified
E84.9 is a billable, specific ICD-10-CM code for cystic fibrosis, unspecified. It is valid for submission on a claim.
Other codes that can never be billed with E84.9
These codes carry an Excludes1 note pointing at E84.9. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading E84.9 alone.
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.
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 of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- 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
How E84.9 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E84.9.
- Mucoviscidosis
- Fibrosis, fibrotic›cystic(of pancreas)
- Disease, diseased›pancreas›fibrocystic
- Fibrocystic›disease›pancreas
- Jaundice›newborn›due to or associated with›mucoviscidosis
Related codes at this level
Codes that share E84. If E84.9 is not quite right, the correct code is usually one of these.
Questions about E84.9
- Is E84.9 a billable ICD-10-CM code?
- Yes. E84.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does E84.9 sit in the tabular list?
- Endocrine, nutritional and metabolic diseases (E00-E89), in the block Metabolic disorders (E70-E88).