I49.40 is the authoritative medical code for Unspecified premature depolarization. This classification is used in medical billing and clinical recording to specify the clinical criteria for unspecified premature depolarization (ICD-10-CM I49.40), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Unspecified premature depolarization is a billable ICD-10-CM diagnosis code I49.40. Inclusion terms: Premature beats NOS. Excludes2 (not included here): bradycardia NOS R00.1; neonatal dysrhythmia P29.1-; sinoatrial bradycardia R00.1; sinus bradycardia R00.1; vagal bradycardia R00.1. Code first: cardiac arrhythmia complicating:; abortion or ectopic or molar pregnancy (O00-O07, O08.8); obstetric surgery and procedures O75.4.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for I49.40 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- bradycardia NOS R00.1
- neonatal dysrhythmia P29.1-
- sinoatrial bradycardia R00.1
- sinus bradycardia R00.1
- vagal bradycardia R00.1
Code First
Underlying conditions that must be sequenced before this code.
- cardiac arrhythmia complicating:
- abortion or ectopic or molar pregnancy (O00-O07, O08.8)
- obstetric surgery and procedures O75.4
Frequently Asked Questions (FAQ) & Clinical Guidance
Can I49.40 be reported alongside related conditions?
Per official ICD-10-CM Excludes2 instructions, I49.40 and the following are not considered part of each other and may both be reported when both conditions are present: bradycardia NOS (R00.1); neonatal dysrhythmia (P29.1-); sinoatrial bradycardia (R00.1); sinus bradycardia (R00.1).
Does I49.40 need to be sequenced after another code?
Yes. Code first: cardiac arrhythmia complicating:; abortion or ectopic or molar pregnancy (O00-O07, O08.8); obstetric surgery and procedures (O75.4).
What conditions are included under I49.40?
Unspecified premature depolarization includes: Premature beats NOS.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to I49.40 in its code family, with their registry titles.
- I49 — Other cardiac arrhythmias
- I49.0 — Ventricular fibrillation and flutter
- I49.01 — Ventricular fibrillation
- I49.02 — Ventricular flutter
- I49.1 — Atrial premature depolarization
- I49.2 — Junctional premature depolarization
- I49.3 — Ventricular premature depolarization
- I49.4 — Other and unspecified premature depolarization
- I49.49 — Other premature depolarization
- I49.5 — Sick sinus syndrome
View all 12 codes in the I49 family
Indexed Clinical Terms (3)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Beat (s), premature
- Depolarization, premature
- Premature, beats