Glossary · Compliance

Local Coverage Article (LCA)

A Local Coverage Article (LCA) is a document published by a Medicare Administrative Contractor (MAC) that provides billing and coding guidance, documentation requirements, and ICD-10/CPT/HCPCS code lists that complement—or in some cases stand alone from—a Local Coverage Determination (LCD).

Verified May 8, 2026 · 8 sources ↓

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Definition

Source · Editorial summary grounded in 8 cited references ↓

A Local Coverage Article (LCA) is an administrative document issued by a MAC that translates coverage policy into actionable coding instructions. Where an LCD answers the question 'Is this service covered?', an LCA answers the operational follow-up: 'How do you bill it correctly?' LCAs carry ICD-10-CM diagnosis code lists that support medical necessity, CPT and HCPCS procedure codes, applicable modifiers, revenue codes, bill types, utilization parameters, and documentation checklists. For DME MACs specifically, HCPCS codes remain inside the LCD itself, but ICD-10, bill type, and revenue codes migrate to the companion LCA.

LCAs fall into two categories. An LCD Reference Article is explicitly tied to a parent LCD and is cited within that LCD's Related Local Coverage Documents section—the Knee Orthoses Policy Article (A52465) and the Total Joint Arthroplasty Billing and Coding Article (A57428) are representative orthopedic examples. A standalone article (sometimes called a 'Not an LCD Reference Article') provides billing and coding guidance independently of any LCD, such as self-administered drug exclusion lists. Since December 2023, MACs have added a visible yellow banner to each article identifying which type it is.

In orthopedics, LCAs are the primary operational reference for high-volume services. The Orthopedic Footwear Policy Article (A52481) is instructive: although an LCD exists for orthopedic footwear (L33641), CMS has placed the statutory coverage criteria—not just the code list—inside the LCA, making the article the de facto first source a coder must consult before submitting a claim for any footwear HCPCS code in that family.

Why it matters

Bypassing the LCA and relying solely on the LCD is one of the most direct paths to a preventable denial or post-payment audit. In orthopedic footwear billing, for example, the LCD defers statutory coverage criteria to the companion LCA; a claim submitted without satisfying the LCA's requirement that footwear be an integral part of a covered leg brace—billed by the same supplier—will be denied regardless of whether a valid ICD-10 code is present. Similarly, because ICD-10 codes supporting medical necessity for orthotic and prosthetic claims now live in the LCA rather than the LCD, omitting or mismatching those codes generates a claim returned as incomplete under Social Security Act §1833(e). Knowing that the LCA, not the LCD, holds the billing-actionable code list means coders avoid submitting a clean diagnosis code pulled from the wrong document.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Treating the LCD as the sole authority and never opening the companion LCA, especially for DME and orthotic claims where ICD-10 codes have migrated entirely to the article.
Assuming every orthopedic procedure has an LCA; if no article exists, the LCD or national policy governs and coders must revert to CMS standard documentation requirements.
Submitting orthopedic footwear HCPCS codes (e.g., L3215–L3222) without verifying the LCA's statutory requirement that the shoes are part of a covered leg brace billed by the same supplier.
Confusing an LCD Reference Article with a standalone article; standalone articles have no parent LCD, so appealing a denial by citing an LCD will fail if the governing document is actually a standalone LCA.
Using an archived LCA version pulled from a stale bookmark rather than the current active article in the Medicare Coverage Database, missing revision-cycle code additions or deletions.
Ignoring the yellow LCD/standalone banner added in December 2023, which quickly flags whether an article ties to an LCD or stands independently—skipping this check wastes time in the wrong policy branch.

Related codes

Codes commonly involved when this concept appears in practice.

Modifiers

KX Medical-policy requirements met LT Left side RT Right side

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 8 cited references ↓

01What is the difference between an LCD and an LCA?

An LCD (Local Coverage Determination) is the policy document that defines whether a service is reasonable and necessary under Medicare. An LCA (Local Coverage Article) is the operational companion that specifies the exact ICD-10, CPT, and HCPCS codes, modifiers, and documentation requirements needed to bill that service correctly. You need both: the LCD to confirm coverage eligibility and the LCA to submit a clean claim.

02Where do I find the ICD-10 codes that support medical necessity for an orthopedic orthotic claim?

For most orthopedic orthotic and prosthetic claims, ICD-10 codes that support medical necessity have moved out of the LCD and into the companion LCA (Billing and Coding Article). Search the Medicare Coverage Database (MCD) by procedure code or LCD ID, then open the linked article to find the supported diagnosis code table.

03Does every LCD have a companion LCA?

No. Some LCDs have no companion article; in those cases, CMS standard documentation requirements apply. Conversely, some LCAs are standalone articles with no parent LCD. Always search the MCD for both document types before assuming one governs the claim.

04Is the LCA legally binding in the same way an LCD is?

LCAs are not themselves coverage determinations—they do not carry the same statutory weight as an LCD under §1869(f)(2)(B) of the Social Security Act. However, the code lists and documentation requirements within an LCA functionally govern whether a claim is paid or denied, so non-compliance produces the same financial result as an LCD violation.

05How do I know if an LCA I found is current?

Check the article's effective date and status field in the Medicare Coverage Database. Since December 2023, MACs also display a yellow banner indicating whether the article is an active LCD reference article or a standalone article. Archived articles are housed separately in the MCD archive and are not valid for current billing.

06For DME MAC claims, are HCPCS codes in the LCD or the LCA?

For DME MACs only, CPT and HCPCS procedure codes remain inside the LCD. ICD-10 diagnosis codes, bill types, and revenue codes have migrated to the companion LCA. This is the reverse of the typical non-DME workflow, so coders switching between DME and non-DME orthopedic claims need to know which document holds which code type.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

When generating or reviewing documentation for orthopedic claims governed by an LCA, Mira should: (1) Identify whether the relevant MAC article is an LCD Reference Article or a standalone article—this determines which document chain controls the coding decision. (2) Pull the active ICD-10-CM codes that support medical necessity from the LCA, not the LCD, for all non-DME MAC orthopedic services and for ICD-10, bill type, and revenue codes under DME MACs. (3) For orthotic and prosthetic orders, confirm the operative note and clinical documentation explicitly justify the diagnosis code selected in the LCA's covered-code table; a diagnosis present in the record but absent from the LCA's supported-code list will not satisfy medical necessity on the claim. (4) Flag orthopedic footwear claims (HCPCS L3215–L3222, A9283) for the LCA requirement that footwear is an integral part of a covered leg brace AND that both the brace and footwear are billed by the same supplier; autopopulate a documentation prompt if this relationship is not stated in the order. (5) For total joint arthroplasty claims, surface the companion Billing and Coding Article (A57428) requirements—including NCCI edit review, referring/ordering NPI, and ICD-10 result vs. symptom reporting rules—before the claim is finalized. (6) When the article type banner is not determinable from context, default to querying the Medicare Coverage Database MCD Search by article ID to confirm active status and article type before coding.

See Mira's approach

A Local Coverage Determination (LCD) is a regional Medicare policy issued by a Medicare Administrative Contractor (MAC) that defines when a specific service, procedure, or supply is considered reasonable and medically necessary within that contractor's jurisdiction.

National Coverage Determination (NCD) Compliance

A National Coverage Determination (NCD) is a formal, evidence-based ruling issued by CMS that establishes whether Medicare will cover a specific item or service across all Medicare contractors nationwide. NCDs are binding on every Medicare Administrative Contractor and supersede any conflicting local policy.

Medicare Administrative Contractor (MAC) Compliance

A Medicare Administrative Contractor (MAC) is a private insurance company under contract with CMS to process and pay Medicare Part A and Part B fee-for-service claims within an assigned geographic jurisdiction. MACs are the primary point of contact for providers on coverage policies, claims adjudication, and local coverage determinations.

Medical necessity Compliance

Medical necessity is the standard requiring that a service or item be reasonable and appropriate for diagnosing or treating a patient's condition according to accepted clinical practice. Payers—including Medicare—use this standard to determine whether a claim will be covered and paid.

HCPCS Level II Coding

HCPCS Level II is the CMS-maintained alphanumeric code set used to bill products, supplies, and services—such as DME, orthotics, prosthetics, and injectable drugs—that CPT codes do not adequately describe. Each code consists of one letter (A–V) followed by four digits.

ICD-10-CM Coding

ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is the U.S. diagnosis coding system used on every claim to communicate why a service was performed, establish medical necessity, and support reimbursement. Maintained by CMS and CDC, it has been required for all HIPAA-covered entities since October 1, 2015.