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I82.A23 ICD-10-CM Code: Chronic embolism and thrombosis of axillary vein, bilateral

Compare with another code for I82.A23Check this code on a claim

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

Coding at a Glance

Tabular directives
9 Excludes2 · 3 code-first instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 108 · RxHCC V08 category 215

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too, and is marked with where it comes from.

Code firstfrom I82Sequence the underlying condition before this code
  • venous embolism and thrombosis complicating:
  • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
  • pregnancy, childbirth and the puerperium (O22.-, O87.-)
Excludes2from I82Not included here; may be reported together
  • venous embolism and thrombosis (of):
  • cerebral (I63.6, I67.6)
  • coronary (I21-I25)
  • intracranial and intraspinal, septic or NOS (G08)

+5 more in Instructions

Where it sits Source: CMS/NCHS

Under:Chapter 9: Diseases of the Circulatory SystemI80-I89 Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classifiedI82 Other venous embolism and thrombosisI82.A Embolism and thrombosis of axillary veinI82.A2 Chronic embolism and thrombosis of axillary vein

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

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 v44, Appendix B.

  • MS-DRG 299 — PERIPHERAL VASCULAR DISORDERS WITH MCC (MDC 05)
  • MS-DRG 300 — PERIPHERAL VASCULAR DISORDERS WITH CC (MDC 05)
  • MS-DRG 301 — PERIPHERAL VASCULAR DISORDERS WITHOUT CC/MCC (MDC 05)

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 267 — Deep Vein Thrombosis and Pulmonary Embolism

Other models: CMS-HCC V22 HCC 108 · RxHCC V08 HCC 215

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 I82.A23 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on I82.A23 itself; “inherited from” names the category or block whose note applies here.

Excludes2 — Not Included Here

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

Source: inherited from I82

Code First

Underlying conditions that must be sequenced before this code.

  • venous embolism and thrombosis complicating:
  • abortion, ectopic or molar pregnancy (O00-O07, O08.7)
  • pregnancy, childbirth and the puerperium (O22.-, O87.-)

Source: inherited from I82

Coder workflow for I82.A23

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

Before you code I82.A23

  1. Laterality is coded in this family. Confirm the side documented — right, left, or bilateral — and select the matching code (this page’s code: bilateral). 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 →

Choose the right path

  1. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then I82.A23.
    No → Continue; do not add an underlying condition the record does not document.

    ReviewO08.7, O22, O87

  2. 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 I82.A23. 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).
Acuity
Acute or chronic as documented; when both are documented and separate codes exist, both are reported with the acute code first (Guidelines I.B.8).
The underlying (etiologic) condition
Named in the Code First note; sequenced before this code when documented (Guidelines I.A.13).

Official instructions as workflow

  • Excludes2 — not part of I82.A23(9 notes)

    Coding workflow: The conditions named in this note are not included in I82.A23. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareI63.6, I67.6, G08, G95.1, K55.0, I81

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

  • Code First — sequencing check(3 notes)

    Coding workflow: Check whether the underlying or etiologic condition the note names is documented. When it is, sequence it before I82.A23. Do not add an underlying condition the record does not document.

    ReviewO08.7, O22, O87

    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 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).

Documentation: The underlying condition the Code First note names is documented alongside this condition.

Coding question: How are the two sequenced?

Path: Review the Code First note.

Reason: The underlying condition is sequenced first and the manifestation follows (Guidelines I.A.13).

ReviewO08.7, O22, O87

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.

Don’t confuse I82.A23 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of I82.A23 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • I82.A29— Specificity relationship (Review)

    Overlapping diagnoses in the same category.

    Overlapping codes in the same category — the documentation decides which is the more specific fit.

    What moves you there: A record that documents no more than “Chronic embolism and thrombosis of unspecified axillary vein” takes I82.A29; specificity in the record moves it back here.

    Full comparison: I82.A23 vs I82.A29 →

  • I63.6— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of cerebral adds I63.6; it is not part of this code and both may be reported when both are documented.

    Full comparison: I82.A23 vs I63.6 →

  • I67.6— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of cerebral adds I67.6; it is not part of this code and both may be reported when both are documented.

    Full comparison: I82.A23 vs I67.6 →

  • I21— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of coronary adds I21; it is not part of this code and both may be reported when both are documented.

    Full comparison: I82.A23 vs I21 →

  • I25— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of coronary adds I25; it is not part of this code and both may be reported when both are documented.

    Full comparison: I82.A23 vs I25 →

  • G08— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of intracranial and intraspinal, septic or NOS adds G08; it is not part of this code and both may be reported when both are documented.

    Full comparison: I82.A23 vs G08 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Chronic embolism and thrombosis of axillary vein, bilateral is a billable ICD-10-CM diagnosis code (I82.A23).

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

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: 3 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  3. 9 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 (FY2027). 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-derived relationships — computed from published CMS and AHRQ datasets

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 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 201 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 299 (MDC 05), DRG 300 (MDC 05), DRG 301 (MDC 05).

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

Clinical classification (AHRQ CCSR):CIR034 — Chronic phlebitis; thrombophlebitis and thromboembolism (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.

I82.890 — Acute embolism and thrombosis of other specified veins, I82.891 — Chronic embolism and thrombosis of other specified veins, I82.90 — Acute embolism and thrombosis of unspecified vein, I82.91 — Chronic embolism and thrombosis of unspecified vein, I82.A11 — Acute embolism and thrombosis of right axillary vein, I82.A12 — Acute embolism and thrombosis of left axillary vein, I82.A13 — Acute embolism and thrombosis of axillary vein, bilateral, I82.A19 — Acute embolism and thrombosis of unspecified axillary vein, I82.A21 — Chronic embolism and thrombosis of right axillary vein, I82.A22 — Chronic embolism and thrombosis of left axillary vein, I82.A29 — Chronic embolism and thrombosis of unspecified axillary vein, I82.B11 — Acute embolism and thrombosis of right subclavian vein, I82.B12 — Acute embolism and thrombosis of left subclavian vein, I82.B13 — Acute embolism and thrombosis of subclavian vein, bilateral, I82.B19 — Acute embolism and thrombosis of unspecified subclavian vein, I82.B21 — Chronic embolism and thrombosis of right subclavian vein, I82.B22 — Chronic embolism and thrombosis of left subclavian vein, I82.B23 — Chronic embolism and thrombosis of subclavian vein, bilateral, I82.B29 — Chronic embolism and thrombosis of unspecified subclavian vein, I82.C11 — Acute embolism and thrombosis of right internal jugular vein, +180 more

Same CMS-HCC risk category (V28)

CMS maps these diagnoses to the same Hierarchical Condition Category (Deep Vein Thrombosis and Pulmonary Embolism) for risk-adjusted payment.

I82.721 — Chronic embolism and thrombosis of deep veins of right upper extremity, I82.722 — Chronic embolism and thrombosis of deep veins of left upper extremity, I82.723 — Chronic embolism and thrombosis of deep veins of upper extremity, bilateral, I82.729 — Chronic embolism and thrombosis of deep veins of unspecified upper extremity, I82.A11 — Acute embolism and thrombosis of right axillary vein, I82.A12 — Acute embolism and thrombosis of left axillary vein, I82.A13 — Acute embolism and thrombosis of axillary vein, bilateral, I82.A19 — Acute embolism and thrombosis of unspecified axillary vein, I82.A21 — Chronic embolism and thrombosis of right axillary vein, I82.A22 — Chronic embolism and thrombosis of left axillary vein, I82.A29 — Chronic embolism and thrombosis of unspecified axillary vein, I82.B11 — Acute embolism and thrombosis of right subclavian vein, I82.B12 — Acute embolism and thrombosis of left subclavian vein, I82.B13 — Acute embolism and thrombosis of subclavian vein, bilateral, I82.B19 — Acute embolism and thrombosis of unspecified subclavian vein, I82.B21 — Chronic embolism and thrombosis of right subclavian vein, I82.B22 — Chronic embolism and thrombosis of left subclavian vein, I82.B23 — Chronic embolism and thrombosis of subclavian vein, bilateral, I82.B29 — Chronic embolism and thrombosis of unspecified subclavian vein, I82.C11 — Acute embolism and thrombosis of right internal jugular vein, +146 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Chronic phlebitis; thrombophlebitis and thromboembolism).

I82.712 — Chronic embolism and thrombosis of superficial veins of left upper extremity, I82.713 — Chronic embolism and thrombosis of superficial veins of upper extremity, bilateral, I82.719 — Chronic embolism and thrombosis of superficial veins of unspecified upper extremity, I82.721 — Chronic embolism and thrombosis of deep veins of right upper extremity, I82.722 — Chronic embolism and thrombosis of deep veins of left upper extremity, I82.723 — Chronic embolism and thrombosis of deep veins of upper extremity, bilateral, I82.729 — Chronic embolism and thrombosis of deep veins of unspecified upper extremity, I82.891 — Chronic embolism and thrombosis of other specified veins, I82.91 — Chronic embolism and thrombosis of unspecified vein, I82.A21 — Chronic embolism and thrombosis of right axillary vein, I82.A22 — Chronic embolism and thrombosis of left axillary vein, I82.A29 — Chronic embolism and thrombosis of unspecified axillary vein, I82.B21 — Chronic embolism and thrombosis of right subclavian vein, I82.B22 — Chronic embolism and thrombosis of left subclavian vein, I82.B23 — Chronic embolism and thrombosis of subclavian vein, bilateral, I82.B29 — Chronic embolism and thrombosis of unspecified subclavian vein, I82.C21 — Chronic embolism and thrombosis of right internal jugular vein, I82.C22 — Chronic embolism and thrombosis of left internal jugular vein, I82.C23 — Chronic embolism and thrombosis of internal jugular vein, bilateral, I82.C29 — Chronic embolism and thrombosis of unspecified internal jugular vein, +48 more

Same Index main term, other category

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

I74.19 — Embolism and thrombosis of other parts of aorta (aorta, aortic, specified site NEC), I74.2 — Embolism and thrombosis of arteries of the upper extremities (upper extremity), I74.3 — Embolism and thrombosis of arteries of the lower extremities (popliteal), I74.4 — Embolism and thrombosis of arteries of extremities, unspecified (artery, limb), I74.5 — Embolism and thrombosis of iliac artery (artery, iliac), I74.8 — Embolism and thrombosis of other arteries (spleen, splenic), I74.9 — Embolism and thrombosis of unspecified artery, I76 — Septic arterial embolism (pyemic), I78.8 — Other diseases of capillaries (capillary), I81 — Portal vein thrombosis (portal), J13 — Pneumonia due to Streptococcus pneumoniae (pyemic, pneumococcal, with pneumonia), K55.0 — Acute vascular disorders of intestine (mesenteric, vein), K55.039 — Acute (reversible) ischemia of large intestine, extent unspecified (intestine), K55.059 — Acute (reversible) ischemia of intestine, part and extent unspecified (mesenteric), K55.069 — Acute infarction of intestine, part and extent unspecified (omentum), K64.5 — Perianal venous thrombosis (anal), N28.0 — Ischemia and infarction of kidney (renal), N48.81 — Thrombosis of superficial vein of penis (penis), N48.89 — Other specified disorders of penis (corpus cavernosum), N50.1 — Vascular disorders of male genital organs (testis), +89 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.

Gamma-glutamyl Transferase (GGT) Test, Partial Thromboplastin Time (PTT) Test, Prothrombin Time Test and INR (PT/INR)

Contextual Map

Every relationship of I82.A23 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.

Hierarchy

Clinical classification (CCSR)

Risk adjustment (CMS-HCC)

  • HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism [CMS-HCC]— 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. 15,708 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 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 — v44 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-derived 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 editorial 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.

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 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

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. "I82.A23 — Chronic embolism and thrombosis of axillary vein, bilateral." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/i82.a23-chronic-embolism-and-thrombosis-of-axillary-vein-bilateral

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Chronic embolism and thrombosis of axillary vein, bilateral

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I82.A23 in its code family, with their registry titles.

View all codes in the I82 family