Skip to main content

D03.12 ICD-10-CM Code: Melanoma in situ of left eyelid, including canthus

Compare with another codeCheck this code on a claim

Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

Tabular directives
4 inclusion terms

Not billable · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

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; the Instructions section marks which is which.

IncludesWhat this code covers
  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia

CompareCheck ClaimView Related Codes

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for D03.12 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 D03.12 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • Bowen's disease
  • erythroplasia
  • grade III intraepithelial neoplasia
  • Queyrat's erythroplasia

Source: inherited from D00-D09

Coder workflow for D03.12

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

Before you code D03.12

  1. D03.12 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewD03.121, D03.122

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  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).

    ReviewD03.11 · right, D03.10 · unspecified

    Guide: Laterality coding →

  3. Confirm the documented site and behavior (this code’s block classifies in situ neoplasms), whether the site is primary or secondary, and whether the malignancy is current or a personal history: a previously excised malignancy with no further treatment and no evidence of disease is history, not current disease. Verify the site against the Table of Neoplasms. Neoplasm chapter guidelines (Guidelines I.C.2.a, I.C.2.d, I.C.2.m).

    See the Table of Neoplasms entries · Guide: Active cancer vs history of cancer →

Choose the right path

  1. Does the documentation support one of the more specific codes beneath D03.12?
    Yes → Select that code and continue the checks below on its own page.
    No → D03.12 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewD03.121, D03.122

  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.

    ReviewD03.11 · right, D03.10 · unspecified

Consider D03.12. 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).
Anatomical site
At the most specific level the record states; a site the classification separates cannot be assumed from a procedure or a measurement.
Laterality
Right, left or bilateral as documented; unspecified only when the record states no side (Guidelines I.B.13).
Behavior and current-versus-history status
Malignant, in situ, benign or uncertain; primary or secondary; current disease or personal history (Guidelines I.C.2.m).

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).

ReviewD03.11 · right, D03.10 · unspecified

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 D03.12 with…

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

The codes most likely to be picked instead of D03.12 — 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.

  • D03.10— 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 “Melanoma in situ of unspecified eyelid, including canthus” takes D03.10; specificity in the record moves it back here.

    Full comparison: D03.12 vs D03.10 →

  • D03.11— Laterality relationship (Review)

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

    The same condition on the other side; 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 D03.11.

    Full comparison: D03.12 vs D03.11 →

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

Melanoma in situ of left eyelid, including canthus is a non-billable ICD-10-CM category code (D03.12). A more specific billable subcode must be selected for claims submission.

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

Verify Before Coding

  • Not billable as written — a more specific code is required: D03.121, D03.122.

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 D03.12 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 6 Excludes1 notes: C43 — Malignant melanoma of skin (via D03.-), D00 — Carcinoma in situ of oral cavity, esophagus and stomach (via D03.-), D01 — Carcinoma in situ of other and unspecified digestive organs (via D03.-), D02 — Carcinoma in situ of middle ear and respiratory system (via D03.-), D04 — Carcinoma in situ of skin (via D03.-), D09 — Carcinoma in situ of other and unspecified sites (via D03.-).

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

Clinical classification (AHRQ CCSR):NEO025 — Skin cancers - melanoma (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 condition, opposite side

Same category and title, differing only in which side of the body is affected.

D03.10 — Melanoma in situ of unspecified eyelid, including canthus (unspecified)Compare D03.12 vs D03.10 →, D03.11 — Melanoma in situ of right eyelid, including canthus (right)Compare D03.12 vs D03.11 →

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Skin cancers - melanoma).

C43.70 — Malignant melanoma of unspecified lower limb, including hip, C43.71 — Malignant melanoma of right lower limb, including hip, C43.72 — Malignant melanoma of left lower limb, including hip, C43.8 — Malignant melanoma of overlapping sites of skin, C43.9 — Malignant melanoma of skin, unspecified, D03.0 — Melanoma in situ of lip, D03.10 — Melanoma in situ of unspecified eyelid, including canthus, D03.11 — Melanoma in situ of right eyelid, including canthus, D03.111 — Melanoma in situ of right upper eyelid, including canthus, D03.112 — Melanoma in situ of right lower eyelid, including canthus, D03.121 — Melanoma in situ of left upper eyelid, including canthus, D03.122 — Melanoma in situ of left lower eyelid, including canthus, D03.20 — Melanoma in situ of unspecified ear and external auricular canal, D03.21 — Melanoma in situ of right ear and external auricular canal, D03.22 — Melanoma in situ of left ear and external auricular canal, D03.30 — Melanoma in situ of unspecified part of face, D03.39 — Melanoma in situ of other parts of face, D03.4 — Melanoma in situ of scalp and neck, D03.51 — Melanoma in situ of anal skin, D03.52 — Melanoma in situ of breast (skin) (soft tissue), +30 more

Same Index main term, other category

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

C43.4 — Malignant melanoma of scalp and neck (skin, neck), C43.51 — Malignant melanoma of anal skin (skin, perineum), C43.52 — Malignant melanoma of skin of breast (skin, breast), C43.59 — Malignant melanoma of other part of trunk (skin, back), C43.6 — Malignant melanoma of upper limb, including shoulder (skin, arm), C43.7 — Malignant melanoma of lower limb, including hip (skin, toe), C43.8 — Malignant melanoma of overlapping sites of skin (skin, overlapping site), C43.9 — Malignant melanoma of skin, unspecified, C51.0 — Malignant neoplasm of labium majus (skin, labium, majus), C51.1 — Malignant neoplasm of labium minus (skin, labium, minus), C51.8 — Malignant neoplasm of overlapping sites of vulva (skin, vulva, overlapping sites), C51.9 — Malignant neoplasm of vulva, unspecified (skin, vulva), C60.0 — Malignant neoplasm of prepuce (skin, prepuce), C60.9 — Malignant neoplasm of penis, unspecified (skin, penis), C63.2 — Malignant neoplasm of scrotum (skin, scrotum), C63.9 — Malignant neoplasm of male genital organ, unspecified (skin, male genital organ NEC), C69.4 — Malignant neoplasm of ciliary body (spindle cell, type B), C79.81 — Secondary malignant neoplasm of breast (metastatic, breast), C79.82 — Secondary malignant neoplasm of genital organs (metastatic, genital organ), C79.89 — Secondary malignant neoplasm of other specified sites (metastatic, specified site NEC), +6 more

Contextual Map

Every relationship of D03.12 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 D03.12 with these 6 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Clinical classification (CCSR)

Nearest codes (31)

Change history (2)

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.

Common coding questions

MedCoder editorial

Can D03.12 be billed directly?

No. D03.12 (Melanoma in situ of left eyelid, including canthus) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

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
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. "D03.12 — Melanoma in situ of left eyelid, including canthus." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/d03.12-melanoma-in-situ-of-left-eyelid-including-canthus

Change history

  • FY2019 — October 1, 2018
    Became a non-billable header
    FY2019 changes
  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Melanoma in situ of left eyelid, including canthus

Nearest Codes in This Family

Official ICD-10-CM classifications closest to D03.12 in its code family, with their registry titles.

View all codes in the D03 family