MCMedicalCodingSoftware
I44.1

I44.1: Atrioventricular block, second degree

Billable / specific codeICD-10-CM

I44.1 is a billable, specific ICD-10-CM code for atrioventricular block, second degree. It is valid for submission on a claim.

Check I44.1 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Atrioventricular block, type I and II
  • Möbitz block, type I and II
  • Second degree block, type I and II
  • Wenckebach's block

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

I44.1 is named in 35 Medicare coverage policies: 35 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52423Billing and Coding: Infliximab and biosimilars
  • A54799Billing and Coding: Urine Drug Testing
  • A54831Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemaker
  • A54909Billing and Coding: Single Chamber and Dual Chamber Permanent Cardiac Pacemakers

Alphabetic index entries that lead here

  • Mobitz heart block(atrioventricular)
  • Wenckebach's block or phenomenon
  • Block, blocked›Mobitz(types I and II)
  • Block, blocked›second degree(types I and II)
  • Block, blocked›Wenckebach(types I and II)
  • Phenomenon›Wenckebach's
  • Block, blocked›atrioventricular›second degree(types I and II)
  • Block, blocked›atrioventricular›types I and II
  • Block, blocked›heart›second degree(atrioventricular)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I44

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.