I44.1 — Atrioventricular block, second degree
I44.1 is a billable, specific ICD-10-CM code for atrioventricular block, second degree. It is valid for submission on a claim.
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
I44.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I44.1 is named in 40 Medicare coverage policies — 40 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- 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
How I44.1 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 I44.1.
- 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)
Related codes at this level
Codes that share I44. If I44.1 is not quite right, the correct code is usually one of these.
Questions about I44.1
- Is I44.1 a billable ICD-10-CM code?
- Yes. I44.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I44.1 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).