Paroxysmal atrial fibrillation
- I48.0Paroxysmal atrial fibrillationICD-10-CMBillableExact title match
Why this matched
- The official ICD-10-CM title is the searched wording.
Atrial fibrillation ICD-10-CM Codes
Atrial fibrillation ICD-10-CM search: Atrial fibrillation and the related coding concepts MedCoder holds for it. Concepts covered: Paroxysmal atrial fibrillation, Persistent atrial fibrillation, Chronic and permanent atrial fibrillation, Unspecified atrial fibrillation. Results are organised from ICD-10-CM, HCPCS Level II.
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources
Why these results?
How MedCoder read the search, which code set answered first, and why these codes are shown.
What MedCoder understood
- You searched
- atrial fibrillation
- Search type
- ICD-10-CM diagnosis / coding concept
- Primary registry
- ICD-10-CM
- Primary concept
- Atrial fibrillation
“Atrial fibrillation” is classified in ICD-10-CM by pattern rather than by severity: paroxysmal, persistent (with longstanding persistent separated out), chronic or permanent, and unspecified. Atrial flutter is a different category, and the two are not interchangeable.
Direct match in the official descriptions
- Understood as a diagnosis or condition search, so ICD-10-CM is ranked first.
Search results are not a code assignment. Review the documentation, official coding instructions, and applicable rules before selecting a code.
Coding pathways
The distinct coding situations the concept covers — acute, subsequent, history, complication, related condition — and the primary family’s own subdivisions.
What are you looking for?
Selecting a pathway filters the results below. It does not select a code.
Recommended codes
The codes the published release carries for each pathway, each with the official evidence for the match.
Best coding matches
The ICD-10-CM coding concepts this search covers, and the codes the published release carries for each.
Persistent atrial fibrillation
Subcategory I48.1 separates longstanding persistent from other persistent.
- I48.1Persistent atrial fibrillationICD-10-CMSubcategoryNot billableExact title matchOfficial instructionsExcludes1 1
Why this matched
- The official ICD-10-CM title is the searched wording.
2 codes below, all billable
- I48.11Longstanding persistent atrial fibrillationBillable
- I48.19Other persistent atrial fibrillationBillable
- I48.11Longstanding persistent atrial fibrillationICD-10-CMBillableOfficial index term
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Fibrillation, atrial or auricular, persistent, longstanding”
- I48.19Other persistent atrial fibrillationICD-10-CMBillableOfficial index term
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Fibrillation, atrial or auricular, persistent”
Chronic and permanent atrial fibrillation
- I48.20Chronic atrial fibrillation, unspecifiedICD-10-CMBillableOfficial index termOfficial instructionsExcludes1 1
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Fibrillation, atrial or auricular, chronic”
- I48.2Chronic atrial fibrillationICD-10-CMSubcategoryNot billableOfficial tabular terminology
Why this matched
- Matched through official tabular terminology.
- I48.21Permanent atrial fibrillationICD-10-CMBillableHierarchy match
Why this matched
- Related through the ICD-10-CM tabular hierarchy.
- Sits under I48.2 in the tabular.
Unspecified atrial fibrillation
- I48.91Unspecified atrial fibrillationICD-10-CMBillableExact title match
Why this matched
- The official ICD-10-CM title is the searched wording.
Atrial flutter
A separate category from fibrillation, for records that name flutter.
- I48.3Typical atrial flutterICD-10-CMBillableOfficial index term
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Flutter, atrial or auricular, type I”
- I48.4Atypical atrial flutterICD-10-CMBillableOfficial index term
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Flutter, atrial or auricular, type II”
- I48.92Unspecified atrial flutterICD-10-CMBillableOfficial index term
Why this matched
- Matched through the ICD-10-CM Alphabetic Index.
- Official term: “Flutter, atrial or auricular”
Continue with MedCoder
For I48.0 Paroxysmal atrial fibrillation
Have multiple diagnosis codes? Run Claim Check.
Claim Check reads the official ICD-10-CM instructions for the codes entered. It is not a payer edit, a claims scrubber or a certified coding validator.
Related codes
Neighbouring concepts, the primary code’s own tabular relationships, and every code set’s full results.
Strongest matches across registries
I48Atrial fibrillation and flutter
ICD-10-CM · FY2027 · CURRENTCategoryNot billable
Title match · Official description matches the search terms
Why this matched
- The official description contains the search terms.
- The tabular carries it at category level.
- 12 codes below, 9 billable in the tabular hierarchy.
12 codes below, 9 billable
- I48.0Paroxysmal atrial fibrillationBillable
- I48.1Persistent atrial fibrillationNot billable
- I48.2Chronic atrial fibrillationNot billable
- I48.3Typical atrial flutterBillable
- I48.4Atypical atrial flutterBillable
- I48.9Unspecified atrial fibrillation and atrial flutterNot billable
Explore I48
I48 Atrial fibrillation and flutter — what its code page carries, from the official tables.
ICD-10-CM: 10 matches
See all in ICD-10-CM →5 of them are shown above under Best coding matches.
HCPCS Level II: 3 matches
Show HCPCS Level II results 3 related results
Official source
Code titles, billable status and tabular instructions on this page are read from the published release files in force today: ICD-10-CM FY2027 (CMS and CDC), HCPCS October 2026 (CMS). Open a code to see its official instructions quoted as published, the release and file it came from, its relationships and its change history. A search result is MedCoder’s match of your words to those files, not a code assignment.