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I82.549 ICD-10-CM Code: Chronic embolism and thrombosis of unspecified tibial vein

Compare with another code for I82.549Check this code on a claim

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

Coding at a Glance

Official instructions
1 Excludes1 · 9 Excludes2 · 1 use-additional instruction · 3 code-first instructions
Risk adjustment
CMS-HCC V28: 1 category · CMS-HCC V22 category 108 · RxHCC V08 category 215

What these terms mean →

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.-)
Use additional codefrom I82.5Report with this code when documented
  • Use additional code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)
Excludes1from I82.5Not reported with this code unless documented as unrelated
  • personal history of venous embolism and thrombosis (Z86.718)
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 thrombosisI82.5 Chronic embolism and thrombosis of deep veins of lower extremityI82.54 Chronic embolism and thrombosis of tibial 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 I82.549 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 I82.549 itself; “inherited from” names the category or block whose note applies here.

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).

Source: inherited from I82.5

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

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)

Source: inherited from I82.5

Coder workflow for I82.549

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

Before you code I82.549

  1. Unspecified does not mean incorrect. When the record gives no greater specificity, I82.549 may be the appropriate code. Check the record for detail that supports a more specific sibling — in this subcategory the siblings differ by acute versus chronic. 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).

    ReviewI82.541, I82.542, I82.543

    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: unspecified). 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).

    ReviewI82.541 · right, I82.542 · left

    Guide: Laterality coding →

  3. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with I82.549. 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 — I82.549 is appropriate when the documentation goes no further.

    ReviewI82.541, I82.542, I82.543

  2. Does the documentation support a condition named in I82.549’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.

    ReviewZ86.718

  3. Is the underlying (etiologic) condition the Code First note names documented?
    Yes → Sequence the underlying condition first, then I82.549.
    No → Continue; do not add an underlying condition the record does not document.

    ReviewO08.7, O22, O87

  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.

    ReviewI82.541 · right, I82.542 · left

Consider I82.549. Then work the Use Additional Code note, and 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).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.
Any detail beyond this code’s title
What the record states that a more specific code would capture — or its absence, which itself supports the unspecified code.

Official instructions as workflow

  • Excludes1 — check before selecting I82.549(1 note)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with I82.549: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareZ86.718

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

  • Excludes2 — not part of I82.549(9 notes)

    Coding workflow: The conditions named in this note are not included in I82.549. 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 I82.549. Do not add an underlying condition the record does not document.

    ReviewO08.7, O22, O87

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

  • Use Additional Code — after identifying I82.549(1 note)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with I82.549 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewZ79.01

    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).

ReviewI82.541, I82.542, I82.543

Documentation: Both the condition I82.549 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).

ReviewZ86.718

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).

ReviewI82.541 · right, I82.542 · left

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 I82.549 with…

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

The codes most likely to be picked instead of I82.549 — 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.

  • Z86.718— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of personal history of venous embolism and thrombosis moves the case to Z86.718; the two are not reported together unless documented as unrelated.

    Full comparison: I82.549 vs Z86.718 →

  • I82.541— Laterality relationship (Review)

    Same condition; these differ only in which side is documented.

    The same condition with a different side named (the opposite side, both sides, or none); the documented side decides, and a bilateral code, where one exists, replaces the pair when both sides are documented.

    What moves you there: A documented right side moves the case to I82.541.

    Full comparison: I82.549 vs I82.541 →

  • I82.542— Laterality relationship (Review)

    Same condition; these differ only in which side is documented.

    The same condition with a different side named (the opposite side, both sides, or none); the documented side decides, and a bilateral code, where one exists, replaces the pair when both sides are documented.

    What moves you there: A documented left side moves the case to I82.542.

    Full comparison: I82.549 vs I82.542 →

  • 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: I82.549 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: I82.549 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: I82.549 vs I21 →

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 unspecified tibial vein is a billable ICD-10-CM diagnosis code (I82.549).

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. Sequencing: 3 Code First instructions — the underlying condition is sequenced before this code when present. See the Code First notes
  2. 1 Use Additional Code instruction — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  3. 1 Excludes1 entry — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 notes
  4. 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

Other codes that name I82.549 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: I80 — Phlebitis and thrombophlebitis (via I82.5.-).

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

Referenced by 2 Use Additional Code instructions: O22.3 — Deep phlebothrombosis in pregnancy (via I82.5.-), O87.1 — Deep phlebothrombosis in the puerperium (via I82.5.-).

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

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.

I82.522 — Chronic embolism and thrombosis of left iliac vein, I82.523 — Chronic embolism and thrombosis of iliac vein, bilateral, I82.529 — Chronic embolism and thrombosis of unspecified iliac vein, I82.531 — Chronic embolism and thrombosis of right popliteal vein, I82.532 — Chronic embolism and thrombosis of left popliteal vein, I82.533 — Chronic embolism and thrombosis of popliteal vein, bilateral, I82.539 — Chronic embolism and thrombosis of unspecified popliteal vein, I82.541 — Chronic embolism and thrombosis of right tibial vein, I82.542 — Chronic embolism and thrombosis of left tibial vein, I82.543 — Chronic embolism and thrombosis of tibial vein, bilateral, I82.551 — Chronic embolism and thrombosis of right peroneal vein, I82.552 — Chronic embolism and thrombosis of left peroneal vein, I82.553 — Chronic embolism and thrombosis of peroneal vein, bilateral, I82.559 — Chronic embolism and thrombosis of unspecified peroneal vein, I82.561 — Chronic embolism and thrombosis of right calf muscular vein, I82.562 — Chronic embolism and thrombosis of left calf muscular vein, I82.563 — Chronic embolism and thrombosis of calf muscular vein, bilateral, I82.569 — Chronic embolism and thrombosis of unspecified calf muscular vein, I82.591 — Chronic embolism and thrombosis of other specified deep vein of right lower extremity, I82.592 — Chronic embolism and thrombosis of other specified deep vein of left lower extremity, +180 more

Same condition, different side

Same title, differing only in which side of the body it names: right, left, bilateral or unspecified.

I82.541 — Chronic embolism and thrombosis of right tibial vein (right)Compare I82.549 vs I82.541 →, I82.542 — Chronic embolism and thrombosis of left tibial vein (left)Compare I82.549 vs I82.542 →

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.

I82.522 — Chronic embolism and thrombosis of left iliac vein, I82.523 — Chronic embolism and thrombosis of iliac vein, bilateral, I82.529 — Chronic embolism and thrombosis of unspecified iliac vein, I82.531 — Chronic embolism and thrombosis of right popliteal vein, I82.532 — Chronic embolism and thrombosis of left popliteal vein, I82.533 — Chronic embolism and thrombosis of popliteal vein, bilateral, I82.539 — Chronic embolism and thrombosis of unspecified popliteal vein, I82.541 — Chronic embolism and thrombosis of right tibial vein, I82.542 — Chronic embolism and thrombosis of left tibial vein, I82.543 — Chronic embolism and thrombosis of tibial vein, bilateral, I82.551 — Chronic embolism and thrombosis of right peroneal vein, I82.552 — Chronic embolism and thrombosis of left peroneal vein, I82.553 — Chronic embolism and thrombosis of peroneal vein, bilateral, I82.559 — Chronic embolism and thrombosis of unspecified peroneal vein, I82.561 — Chronic embolism and thrombosis of right calf muscular vein, I82.562 — Chronic embolism and thrombosis of left calf muscular vein, I82.563 — Chronic embolism and thrombosis of calf muscular vein, bilateral, I82.569 — Chronic embolism and thrombosis of unspecified calf muscular vein, I82.591 — Chronic embolism and thrombosis of other specified deep vein of right lower extremity, I82.592 — Chronic embolism and thrombosis of other specified deep vein of left lower extremity, +146 more

Same clinical category (CCSR)

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

I82.522 — Chronic embolism and thrombosis of left iliac vein, I82.523 — Chronic embolism and thrombosis of iliac vein, bilateral, I82.529 — Chronic embolism and thrombosis of unspecified iliac vein, I82.531 — Chronic embolism and thrombosis of right popliteal vein, I82.532 — Chronic embolism and thrombosis of left popliteal vein, I82.533 — Chronic embolism and thrombosis of popliteal vein, bilateral, I82.539 — Chronic embolism and thrombosis of unspecified popliteal vein, I82.541 — Chronic embolism and thrombosis of right tibial vein, I82.542 — Chronic embolism and thrombosis of left tibial vein, I82.543 — Chronic embolism and thrombosis of tibial vein, bilateral, I82.551 — Chronic embolism and thrombosis of right peroneal vein, I82.552 — Chronic embolism and thrombosis of left peroneal vein, I82.553 — Chronic embolism and thrombosis of peroneal vein, bilateral, I82.559 — Chronic embolism and thrombosis of unspecified peroneal vein, I82.561 — Chronic embolism and thrombosis of right calf muscular vein, I82.562 — Chronic embolism and thrombosis of left calf muscular vein, I82.563 — Chronic embolism and thrombosis of calf muscular vein, bilateral, I82.569 — Chronic embolism and thrombosis of unspecified calf muscular vein, I82.591 — Chronic embolism and thrombosis of other specified deep vein of right lower extremity, I82.592 — Chronic embolism and thrombosis of other specified deep vein of left lower extremity, +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 I82.549 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 I82.549 with these 3 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

  • I80 — Phlebitis and thrombophlebitis[Excludes1](via I82.5.-): “venous embolism and thrombosis of lower extremities (I82.4-, I82.5-, I82.81-)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Use Additional Code instructions

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. "I82.549 — Chronic embolism and thrombosis of unspecified tibial vein." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/i82.549-chronic-embolism-and-thrombosis-of-unspecified-tibial-vein

Change history

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

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 I82.549 in its code family, with their registry titles.

View all codes in the I82 family