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I50.1 ICD-10-CM Code: Left ventricular failure, unspecified

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
6 inclusion terms · 2 Excludes1 · 2 Excludes2 · 6 code-first instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 85 · RxHCC V08 category 186

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 291 — HEART FAILURE AND SHOCK WITH MCC (MDC 05)
  • MS-DRG 292 — HEART FAILURE AND SHOCK WITH CC (MDC 05)
  • MS-DRG 293 — HEART FAILURE AND SHOCK WITHOUT CC/MCC (MDC 05)
  • MS-DRG 791 — PREMATURITY WITH MAJOR PROBLEMS (MDC 15)
  • MS-DRG 793 — FULL TERM NEONATE WITH MAJOR PROBLEMS (MDC 15)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Risk Adjustment (CMS-HCC)

Payment categories this diagnosis maps to under CMS-HCC V28, payment year 2026.

  • HCC 226 — Heart Failure, Except End-Stage and Acute (supersedes HCC 227)

Other models: CMS-HCC V22 HCC 85 · RxHCC V08 HCC 186

Risk scores depend on the enrollee's full accepted diagnosis set and segment; a category mapping alone does not determine payment.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for I50.1 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on I50.1 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Cardiac asthma
  • Edema of lung with heart disease NOS
  • Edema of lung with heart failure
  • Left heart failure
  • Pulmonary edema with heart disease NOS
  • Pulmonary edema with heart failure

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Source: inherited from I50

Code First

Underlying conditions that must be sequenced before this code.

  • heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8)
  • heart failure due to hypertension (I11.0)
  • heart failure due to hypertension with chronic kidney disease (I13.-)
  • heart failure following surgery (I97.13-)
  • obstetric surgery and procedures (O75.4)
  • rheumatic heart failure (I09.81)

Source: inherited from I50

Coder workflow for I50.1

MedCoder structured workflow — derived from this code’s own official record

Before you code I50.1

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, I50.1 may be the appropriate code. Check the record for detail that supports a more specific sibling. An unspecified code is for records that do not provide the detail a more specific code needs; a query, not an assumption, is the route to specificity (Guidelines I.A.9.b, I.B.18).

    ReviewI50.2, I50.3, I50.4, I50.8

    See the relationships section · Guide: Other vs unspecified (NEC vs NOS) →

  2. Laterality is coded in this family. Confirm the side documented — right, left, or bilateral — and select the matching code (this page’s code: left). The unspecified-side code applies only when the record states no side. Laterality is assigned from the documented side; where a bilateral code exists and both sides are documented, it is used instead of two unilateral codes (Guidelines I.B.13).

    See the relationships section · Guide: Laterality coding →

  3. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with I50.1. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the record document the detail a more specific sibling code needs?
    Yes → Review the specific siblings in this subcategory.
    No → Continue — I50.1 is appropriate when the documentation goes no further.

    ReviewI50.2, I50.3, I50.4, I50.8

  2. Does the documentation support a condition named in I50.1’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewJ81

  3. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then I50.1.
    No → Continue; do not add an underlying condition the record does not document.

    ReviewO08.8, I11.0, I13, I97.13, O75.4, I09.81

  4. Is the side documented?
    Yes → Select the code for the documented side (or the bilateral code when both sides are documented and one exists).
    No → Use the unspecified-side code only when the record states no side; a query is the alternative.

Consider I50.1. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Laterality
Right, left or bilateral as documented; unspecified only when the record states no side (Guidelines I.B.13).
The underlying (etiologic) condition
Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).
Any detail beyond this code’s title
What the record states that a more specific sibling code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes1 — check before selecting I50.1(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with I50.1: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareJ81

    See the official tabular notes · Guidelines I.A.12.a

  • Excludes2 — not part of I50.1(2 notes)

    Coding workflow: The conditions named in this note are not included in I50.1. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareI46, P29.0

    See the official tabular notes · Guidelines I.A.12.b

  • Code First — sequencing check(6 notes)

    Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before I50.1. Do not add an underlying condition the record does not document.

    ReviewO08.8, I11.0, I13, I97.13, O75.4, I09.81

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The provider documents the condition in the terms of this code’s title and records no further detail.

Coding question: Is a more specific sibling code supportable?

Path: Review the specific siblings in this subcategory and what each requires the record to state.

Reason: A more specific code needs documentation of the distinguishing element; without it the unspecified code is appropriate, and a provider query is the route to specificity (Guidelines I.A.9.b, I.B.18).

ReviewI50.2, I50.3, I50.4, I50.8

Documentation: Both the condition I50.1 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewJ81

Documentation: The record documents the condition on one side only.

Coding question: Which code in this family applies?

Path: Select the sibling code for the documented side.

Reason: Laterality is assigned from the documented side; the unspecified-side code is for records that state no side (Guidelines I.B.13).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Left ventricular failure, unspecified is a billable ICD-10-CM diagnosis code (I50.1).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (10)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Official Coding Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Official source data — quoted verbatim from the CMS/NCHS Official Guidelines

Verbatim excerpts from the ICD-10-CM Official Guidelines for Coding and Reporting (CMS/NCHS) that govern this code.

Chapter 9: Diseases of the Circulatory System (I00 -I99)

1) Hypertension with Heart Disease Hypertension with heart conditions classified to I50.-, Heart failure, I51.4, Myocarditis, unspecified, I51.89, Other ill-defined heart diseases, and I51.9, Heart disease, unspecified, is assigned to a code from category I11, Hypertensive heart disease. Use additional code(s) from category I50, Heart failure, or I51, Complications and ill-defined descriptions of heart disease, to identify the heart condition.

Chapter 9: Diseases of the Circulatory System (I00 -I99)

The same heart conditions (I50.-, I51.4-I51.7, I51.89, I51.9) with hypertension are coded separately if the provider has documented they are unrelated to the hypertension. The applicable hypertension code I10, Essential (primary) hypertension, or a code from category I15, Secondary hypertension, should be assigned. Sequence according to the circumstances of the admission/encounter.

Chapter 9: Diseases of the Circulatory System (I00 -I99)

3) Hypertensive Heart and Chronic Kidney Disease The codes in category I13, Hypertensive heart and chronic kidney disease, are combination codes that include hypertension, heart disease and chronic kidney disease. Assign codes from combination category I13, Hypertensive heart and chronic kidney disease, when there is hypertension with both heart and chronic kidney disease. If heart failure is present, assign an additional code from category I50 to identify the type of heart failure.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. Laterality is coded in this family. Confirm the documented side matches the code — the opposite-side siblings are in the relationships section. See the opposite-side sibling codes
  2. Sequencing: 6 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  3. 2 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  4. 2 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name I50.1 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 1 Excludes1 note: J81 — Pulmonary edema.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Excludes2 note: J91 — Pleural effusion in conditions classified elsewhere (via I50.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 1 Code First instruction: I5A — Non-ischemic myocardial injury (non-traumatic) (via I50.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 5 Use Additional Code instructions: I09.81 — Rheumatic heart failure (via I50.-), I11.0 — Hypertensive heart disease with heart failure (via I50.-), I13.0 — Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease (via I50.-), I13.2 — Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease (via I50.-), I97.13 — Postprocedural heart failure (via I50.-).

These codes instruct coders to additionally report this code when it applies.

Referenced by 4 Code Also instructions across 2 chapters: E83.820 — Generalized arterial calcification of infancy with unspecified genetic causality (via I50.-), E83.821 — ENPP1 deficiency causing generalized arterial calcification of infancy (via I50.-), E83.823 — ABCC6 deficiency causing generalized arterial calcification of infancy (via I50.-), I16.1 — Hypertensive emergency (via I50.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 33 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 5 MS-DRGs: DRG 291 (MDC 05), DRG 292 (MDC 05), DRG 293 (MDC 05), DRG 791 (MDC 15), DRG 793 (MDC 15).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):CIR019 — Heart failure (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as CC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

I09.81 — Rheumatic heart failure, I11.0 — Hypertensive heart disease with heart failure, I13.2 — Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease, I27.841 — Fontan-associated lymphatic dysfunction, I27.848 — Other Fontan-associated condition, I27.849 — Fontan related circulation, unspecified, I50.20 — Unspecified systolic (congestive) heart failure, I50.21 — Acute systolic (congestive) heart failure, I50.22 — Chronic systolic (congestive) heart failure, I50.23 — Acute on chronic systolic (congestive) heart failure, I50.30 — Unspecified diastolic (congestive) heart failure, I50.31 — Acute diastolic (congestive) heart failure, I50.32 — Chronic diastolic (congestive) heart failure, I50.33 — Acute on chronic diastolic (congestive) heart failure, I50.40 — Unspecified combined systolic (congestive) and diastolic (congestive) heart failure, I50.41 — Acute combined systolic (congestive) and diastolic (congestive) heart failure, I50.42 — Chronic combined systolic (congestive) and diastolic (congestive) heart failure, I50.43 — Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure, I50.810 — Right heart failure, unspecified, I50.811 — Acute right heart failure, +12 more

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Heart Failure, Except End-Stage and Acute) for risk-adjusted payment.

I27.24 — Chronic thromboembolic pulmonary hypertension, I27.29 — Other secondary pulmonary hypertension, I27.81 — Cor pulmonale (chronic), I27.83 — Eisenmenger's syndrome, I27.89 — Other specified pulmonary heart diseases, I27.9 — Pulmonary heart disease, unspecified, I28.0 — Arteriovenous fistula of pulmonary vessels, I28.1 — Aneurysm of pulmonary artery, I28.8 — Other diseases of pulmonary vessels, I28.9 — Disease of pulmonary vessels, unspecified, I50.20 — Unspecified systolic (congestive) heart failure, I50.22 — Chronic systolic (congestive) heart failure, I50.30 — Unspecified diastolic (congestive) heart failure, I50.32 — Chronic diastolic (congestive) heart failure, I50.40 — Unspecified combined systolic (congestive) and diastolic (congestive) heart failure, I50.42 — Chronic combined systolic (congestive) and diastolic (congestive) heart failure, I50.810 — Right heart failure, unspecified, I50.812 — Chronic right heart failure, I50.814 — Right heart failure due to left heart failure, I50.82 — Biventricular heart failure, +13 more

Related risk categories

These categories interact through CMS's HCC hierarchy — one can suppress the other's risk-adjustment weight when both are present on a claim.

Heart Failure with Heart Assist Device/Artificial Heart, Acute on Chronic Heart Failure, Acute Heart Failure (Excludes Acute on Chronic), Cardiomyopathy/Myocarditis

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Heart failure).

I09.81 — Rheumatic heart failure, I11.0 — Hypertensive heart disease with heart failure, I13.0 — Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease, I13.2 — Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease, I50.20 — Unspecified systolic (congestive) heart failure, I50.21 — Acute systolic (congestive) heart failure, I50.22 — Chronic systolic (congestive) heart failure, I50.23 — Acute on chronic systolic (congestive) heart failure, I50.30 — Unspecified diastolic (congestive) heart failure, I50.31 — Acute diastolic (congestive) heart failure, I50.32 — Chronic diastolic (congestive) heart failure, I50.33 — Acute on chronic diastolic (congestive) heart failure, I50.40 — Unspecified combined systolic (congestive) and diastolic (congestive) heart failure, I50.41 — Acute combined systolic (congestive) and diastolic (congestive) heart failure, I50.42 — Chronic combined systolic (congestive) and diastolic (congestive) heart failure, I50.43 — Acute on chronic combined systolic (congestive) and diastolic (congestive) heart failure, I50.810 — Right heart failure, unspecified, I50.811 — Acute right heart failure, I50.812 — Chronic right heart failure, I50.813 — Acute on chronic right heart failure, +14 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Failure, failed”, “Edema, edematous”, “Asthma, asthmatic”; these codes share that main term but sit in a different category of the Tabular List.

H35.81 — Retinal edema (retina), I01.8 — Other acute rheumatic heart disease (heart, congestive, rheumatic, active or acute), I02.0 — Rheumatic chorea with heart involvement (heart, congestive, rheumatic, active or acute, with chorea), I05.8 — Other rheumatic mitral valve diseases (mitral), I06.8 — Other rheumatic aortic valve diseases (aortic, rheumatic), I09.81 — Rheumatic heart failure (heart, congestive, rheumatic), I09.9 — Rheumatic heart disease, unspecified (heart, rheumatic), I12.0 — Hypertensive chronic kidney disease with stage 5 chronic kidney disease or end stage renal disease (renal, end stage, due to hypertension), I13.2 — Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease (cardiorenal, hypertensive), I35.8 — Other nonrheumatic aortic valve disorders (aortic), I67.9 — Cerebrovascular disease, unspecified (cerebrovascular), I70.90 — Unspecified atherosclerosis (heart, arteriosclerotic), I73.9 — Peripheral vascular disease, unspecified (angiospastic), I87.1 — Compression of vein (legs, due to venous obstruction), I89.0 — Lymphedema, not elsewhere classified (lymphatic), I97.13 — Postprocedural heart failure (heart, postprocedural), I97.130 — Postprocedural heart failure following cardiac surgery (heart, following cardiac surgery), I97.131 — Postprocedural heart failure following other surgery (heart, following other surgery), I97.2 — Postmastectomy lymphedema syndrome (lymphatic, due to mastectomy), J38.4 — Edema of larynx (glottis, glottic, glottidis), +203 more

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Iron Panel, Lipid Panel, Prothrombin Time Test and INR (PT/INR), Thyroid Stimulating Hormone (TSH)

Contextual Map

Every relationship of I50.1 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run I50.1 with these 12 related codes in Claim Check

Hierarchy

Excludes1

  • J81 — Pulmonary edema[Excludes1]: “edema of lung without heart disease or heart failure (J81.-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes1 notes

  • J81 — Pulmonary edema[Excludes1]: “pulmonary edema with heart disease NOS (I50.1)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2026

Referenced by Excludes2 notes

Referenced by Code First instructions

Referenced by Use Additional Code instructions

Referenced by Code Also instructions

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 226 — Heart Failure, Except End-Stage and Acute [CMS-HCC]: “Heart Failure, Except End-Stage and Acute — supersedes HCC 227 (Cardiomyopathy/Myocarditis)”— CMS-HCC V28 · 2026

MS-DRG Grouper

MDC crossing

  • MDC 05 — Diseases and Disorders of the Circulatory System[MDC crossing]: “Diseases and Disorders of the Circulatory System — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 17,209 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026
  • MDC 15 — Newborns and Other Neonates with Conditions Originating in Perinatal Period[MDC crossing]: “Newborns and Other Neonates with Conditions Originating in Perinatal Period — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (10)

  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic), cardiobronchial[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic), heart[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Asthma, asthmatic (bronchial) (catarrh) (spasmodic), Rostan's[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Disease, diseased, heart (organic), with, pulmonary edema (acute)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Edema, edematous (infectious) (pitting) (toxic), lung, meaning failure, left ventricle[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Failure, failed, ventricular, left[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Stone (s), heart syndrome[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Syndrome, cardiac asthma[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • and 2 more

Nearest codes (28)

Change history (3)

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Coding guidelines Official source data
ICD-10-CM Official Guidelines for Coding and Reporting (FY2026), quoted by section Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Risk adjustment Official source data
2026 Mid-Year Final ICD-10 Mappings + Model Software (cms.gov/files/zip/2026-midyear-final-icd-10-mappings.zip, 2026-midyear-final-model-software.zip) — CMS-HCC V28, PY2026 mid-year final release Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "I50.1 — Left ventricular failure, unspecified." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/i50.1-left-ventricular-failure-unspecified

Change history

  • FY2018 — October 1, 2017
    Description revised
    Left ventricular failure → Left ventricular failure, unspecified
    FY2018 changes
  • FY2018 — October 1, 2017
    Short description revised
    Left ventricular failure → Left ventricular failure, unspecified
    FY2018 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Left ventricular failure

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I50.1 in its code family, with their registry titles.

View all codes in the I50 family