CMS Modified NCD 259 for Cardiointegram (CIG), Effective January 9, 2026 — What Billing Teams Need to Know

TL;DR: The Centers for Medicare & Medicaid Services modified NCD 259 governing cardiointegram (CIG) coverage, effective January 9, 2026. CIG remains non-covered under Medicare. No reimbursement is available for this service. If your facility or practice has billed — or is considering billing — for CIG procedures, stop now and read this.

The CMS cardiointegram coverage policy under NCD 259 has not opened a path to payment. The modification confirms that CIG is still considered investigational. CMS cites insufficient clinical efficacy and sensitivity data. The policy does not list specific CPT or HCPCS codes for this procedure — that absence is itself meaningful, and we'll get into why below.

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Field	Detail
Payer	CMS (Centers for Medicare & Medicaid Services)
Policy	Cardiointegram (CIG) as an Alternative to Stress Test or Thallium Stress Test
Policy Code	NCD 259
Change Type	Modified
Effective Date	January 9, 2026
Impact Level	Medium — financial exposure for any practice currently billing CIG services to Medicare
Specialties Affected	Cardiology, Internal Medicine, Nuclear Medicine, Diagnostic Imaging
Key Action	Audit any CIG claims submitted to Medicare and halt future submissions immediately

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CMS Cardiointegram Coverage Criteria and Medical Necessity Requirements 2026

Understanding what CMS covers — and why — is the starting point for any claim decision. Under NCD 259, CMS cardiointegram coverage policy is clear: CIG does not meet medical necessity standards for Medicare payment at this time.

A cardiointegram device uses a microcomputer that receives output from a standard EKG. It transforms that signal into a graphic representation of heart electrophysiologic activity. The intended clinical use is as a substitute for Exercise Tolerance Testing with Thallium Imaging — specifically for patients where a resting EKG is inadequate to identify changes consistent with coronary artery disease.

The clinical rationale sounds reasonable. The problem is that CMS does not consider the supporting evidence sufficient. The agency classifies CIG as investigational, pending additional data on its clinical efficacy, sensitivity, and diagnostic value. Until that data exists and CMS reviews it, program payment is not available.

From a medical necessity standpoint, this is a hard stop. CIG doesn't fail medical necessity because of documentation problems or missing prior authorization. It fails because CMS has determined — at the national level — that the procedure's clinical value hasn't been established. No amount of documentation will fix that. This is a national coverage determination, meaning it overrides any local coverage determination or MAC-level policy that might suggest otherwise.

The question of whether a CIG procedure is covered under Medicare has a one-word answer: no. And the January 9, 2026 effective date of this modification doesn't change that answer — it reaffirms it.

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CMS Cardiointegram Exclusions and Non-Covered Indications

This entire policy is, functionally, an exclusion. That's worth stating plainly because NCD 259 doesn't carve out some covered uses while excluding others. CIG is excluded entirely.

The reason CMS gives is investigational status. CIG has not cleared the evidentiary bar CMS requires to authorize reimbursement. The agency is waiting on additional data covering clinical efficacy, sensitivity, and diagnostic utility before it will reconsider.

That word — investigational — does real work in Medicare billing. When CMS calls something investigational, it means:

#	Excluded Procedure Copy
1	No Medicare reimbursement, full stop
2	Advance Beneficiary Notice of Noncoverage (ABN) rules may apply if you attempt to bill the patient directly
3	Submitting claims anyway risks claim denial and potential fraud exposure depending on how claims are coded and documented

Some billing teams assume that if a service has no assigned CPT or HCPCS code, it's simply unbillable and the issue goes away. That's not quite right. Cardiointegram billing attempts using unlisted codes or miscoded procedures still carry denial risk — and compliance risk if they're done in a pattern.

If your compliance officer hasn't reviewed your charge capture for any CIG-related services, loop them in before the end of Q1 2026.

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Coverage Indications at a Glance

Indication	Status	Relevant Codes	Notes Copy
CIG as alternative to Exercise Tolerance Testing with Thallium Imaging	Not Covered — Investigational	No codes assigned by CMS	CMS cites insufficient clinical efficacy and sensitivity data
CIG in patients with inadequate resting EKG for CAD assessment	Not Covered — Investigational	No codes assigned by CMS	Investigational designation applies regardless of patient presentation
CIG as a substitute for standard cardiac stress testing	Not Covered — Investigational	No codes assigned by CMS	National non-coverage under NCD 259; no prior authorization pathway exists

Every row in this table draws directly from the NCD 259 policy summary. CMS does not distinguish between patient types or clinical scenarios. The investigational designation is blanket.

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CMS Cardiointegram Billing Guidelines and Action Items 2026

The effective date of January 9, 2026 is already here. These action items are not theoretical — they apply now.

Copy Action Items

The real issue with a policy like this is not the denial itself — it's the downstream consequences when billing teams don't catch it. A pattern of denied CIG claims triggers audits. Audits trigger broader reviews of your cardiology billing. Address this at the source.

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CPT, HCPCS, and ICD-10 Codes for Cardiointegram Under NCD 259

Covered CPT Codes

NCD 259 does not identify any covered CPT or HCPCS codes for cardiointegram procedures. CIG is not covered under Medicare. There are no covered code assignments.

Not Covered / Experimental Codes

NCD 259 does not assign specific CPT or HCPCS codes to the cardiointegram procedure. The policy documentation explicitly lists no applicable codes. This is not a gap in our reporting — it reflects the actual policy data.

The absence of assigned codes is consistent with investigational status. CMS has not created a billing pathway for CIG because there is no coverage to bill against.

A Note on Code Lookup for CIG

Because CMS has not assigned codes to this procedure, some billing teams try to find workarounds — billing for the underlying EKG component, using unlisted cardiology codes, or bundling CIG into a broader cardiac workup. Each of those approaches carries its own denial and compliance risk. The NCD 259 coverage policy is a national determination. It doesn't become payable through creative coding.

If your cardiologists believe CIG has clinical value and want to pursue coverage, the right path is through formal evidence development and a CMS coverage request — not through billing. That's a medical and administrative conversation, not a billing one.

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