Advanced Primary Care Management (APCM) is a Medicare care-management reimbursement framework that pays primary care practices a tiered monthly per-patient amount (PMPM) for ongoing care of qualifying patients. CMS finalized APCM in the CY2025 Physician Fee Schedule Final Rule and expanded it in the CY2026 Physician Fee Schedule Final Rule with new behavioral health add-on codes (G0568-G0570). For most independent primary care practices, the combined billing surface represents one of the most meaningful Medicare expansions for primary care in the last decade.

What is APCM, exactly?

APCM is a bundled care-management payment structure that consolidates activities previously billed through separate codes — Chronic Care Management (CCM), Behavioral Health Integration (BHI), Principal Care Management (PCM), and Transitional Care Management (TCM) — into a tiered monthly PMPM payment under three HCPCS codes: G0556, G0557, and G0558. The framework reduces per-encounter documentation requirements and pays more for patients with greater clinical complexity.

CMS introduced APCM in the CY2025 PFS Final Rule, with an effective date of January 1, 2025. The CY2026 PFS Final Rule retained the structure, adjusted PMPM rates, and added behavioral health add-on codes that PCPs can bill alongside the APCM base codes for patients receiving Collaborative Care Model (CoCM) or general BHI services.

The shift matters because it changes the economics of care management. Predecessor codes were administratively expensive to bill, structurally penalized practices with the most complex patient panels, and rarely produced enough revenue to fund the staffing required to deliver the underlying services. APCM is CMS’s attempt to fix that.

Why did CMS introduce APCM?

The care-management code family that preceded APCM — CCM (99490-99491), BHI (99484), PCM (99424-99427), and TCM (99495-99496) — accumulated more than a decade of criticism from primary care organizations, including the American Academy of Family Physicians (AAFP) and the National Association of ACOs (NAACOS). The core complaints: documentation overhead consumed most of the reimbursement value, time-based billing thresholds were difficult to track, and the codes paid the same amount regardless of patient complexity — penalizing practices serving sicker populations.

CMS responded by bundling the underlying activities, removing time-based thresholds in favor of monthly-eligibility-and-activity standards, tiering payment by patient complexity, and setting PMPM rates at levels intended to make care management economically viable for independent primary care. The CY2025 PFS Final Rule preamble explicitly framed APCM as a response to feedback that prior care-management codes had failed to support sustainable infrastructure investment in primary care.

Whether APCM achieves that goal in practice depends on operationalization — particularly tier-determination accuracy, documentation discipline, and the cost structure of the underlying care-management infrastructure. Those operational details are where most of the actual revenue is won or lost.

How is the three-tier structure organized?

APCM uses three HCPCS codes — G0556, G0557, and G0558 — corresponding to three tiers of patient complexity. PMPM rates rise with tier, reflecting the higher staffing and clinical-judgment cost of managing more complex patients.

The CY2026 PFS Final Rule sets approximate national PMPM rates in the range of $15 (Tier 1) to $110 (Tier 3), with the Tier 2 rate falling in between. Actual paid amounts vary by Geographic Practice Cost Index (GPCI) adjustment and the annual Medicare Economic Index (MEI) update, so a practice in a high-cost-of-living region will see different paid amounts than the national figure suggests.

Tier determination is not a billing convenience — it is a clinical-judgment exercise documented in the chart. CMS expects tier assignments to reflect the patient’s clinical complexity, comorbidity burden, and care-management intensity, and APCM claims are subject to the same audit scrutiny as other Medicare claims. Practices that miscalibrate tier-determination either undercount complexity (leaving revenue uncollected) or overcount (creating audit exposure). Getting this right is one of the single most consequential operational decisions in an APCM implementation.

For an honest read on which practice profiles are most likely to benefit from APCM, see Does APCM fit your practice?.

What changed in 2026: the BH add-on codes (G0568-G0570)

The CY2026 PFS Final Rule introduced three new HCPCS codes — G0568, G0569, and G0570 — that allow a primary care practice to bill behavioral health integration services alongside its APCM base code for the same patient, in the same month, under the same Taxpayer Identification Number (TIN).

This same-TIN, same-month structure is the critical mechanic. CMS rules require the BH add-on codes to be billed by the PCP under the PCP’s TIN, in the same month as the APCM base code, for the same beneficiary. The BHI services themselves can be delivered by clinical staff working under the PCP’s general supervision — including staff supplied through a Management Services Agreement (MSA) with a behavioral health partner — but the billing entity is always the PCP. A standalone behavioral health organization cannot bill these codes on its own.

That constraint is what makes the partnership model viable. A PCP can:

• Bill APCM base codes (G0556/G0557/G0558) for care-management activities
• Bill BH add-on codes (G0568/G0569/G0570) for behavioral health integration activities, same month, same TIN
• Use a behavioral health partner to supply the actual clinical infrastructure — care manager (BHCM), psychiatric consultant, validated screening tools (PHQ-9, GAD-7), patient registry — under a fixed Fair Market Value MSA

The result is an integrated APCM + BHI billing program for the PCP, without the PCP having to staff a behavioral health team in-house.

Integrated behavioral health care is also tied to quality outcomes that increasingly affect Medicare reimbursement through MIPS, Value-Based Care contracts, and ACO benchmarks. The Collaborative Care Model (CoCM) — on which the BHI activities under G0568-G0570 are largely modeled — has been the subject of more than 90 randomized controlled trials showing improvement in depression, anxiety, and chronic disease management outcomes. Capturing those quality gains while billing the reimbursement codes that fund the underlying staffing is the structural opportunity APCM + BHI creates.

Why does APCM matter in 2026?

Three forces converge in CY2026.

First, the CY2026 PFS Final Rule retained APCM with rate adjustments reflecting MEI updates and refinements to the tier structure. The framework is no longer experimental — it has a full calendar year of claims data, an established billing posture across major Medicare Administrative Contractors (MACs), and a substantially larger body of practical operationalization knowledge than existed at the CY2025 launch.

Second, the new behavioral health add-on codes (G0568-G0570) expand the billable revenue surface for any practice that integrates behavioral health services. For a practice with a meaningful Medicare patient panel and meaningful behavioral health comorbidity (depression, anxiety, substance use, chronic pain with psychiatric overlay), the combined APCM + BHI billing is materially larger than APCM alone.

Third, the broader Medicare payment environment continues to shift toward value-based care, with quality measures, MIPS scoring, and ACO benchmarks increasingly tied to outcomes that integrated behavioral health care directly improves. APCM + BHI is one of the few Medicare reimbursement structures that pays fee-for-service rates for activities that also improve value-based quality scores. That double-counting is unusual and worth taking seriously.

What APCM + BHI actually produces in a given practice depends on patient mix, tier distribution, BHI enrollment rate, and operational execution. Practice-level revenue projections require a real assessment of the patient panel, not an estimate from a public page. A partner that has run dozens of these implementations can produce a realistic projection in a single discovery call.

What does partner-led implementation actually involve?

Operationalizing APCM — and especially APCM + BHI — requires assembling several pieces of infrastructure that most primary care practices do not have in-house and cannot efficiently build at the scale of an independent practice:

• Care management staff. A trained care manager (typically RN, LCSW, or comparable credential) to handle the monthly engagement, documentation, and care plan activities that the APCM codes pay for. For BHI, a Behavioral Health Care Manager (BHCM) with appropriate scope of practice is required.
• Psychiatric consultant relationship. For BHI activities under the Collaborative Care Model, a psychiatric consultant who reviews complex cases and is available to the BHCM and PCP. This is an ongoing contractual relationship, not an ad hoc referral.
• Screening protocols. Validated instruments such as the PHQ-9 and GAD-7 administered systematically, with results documented and acted on per CoCM protocols.
• Patient registry / care management software. A system that tracks enrolled patients, monthly engagement, screening scores, treatment responses, and the audit-trail documentation that CMS requires.
• EHR integration. Care management documentation must be accessible to the billing workflow and survive audit scrutiny.
• Compliance posture. AKS, Stark, HIPAA, and state licensing each apply at different layers and must be addressed in the contractual structure — particularly the partner MSA.

The practical model adopted by most independent practices: a behavioral health partner supplies the clinical infrastructure (care manager, psychiatric consultant, screening protocols, registry, documentation workflow) under a fixed Fair Market Value Management Services Agreement. The PCP bills Medicare under its own TIN for the APCM and BHI codes. The partner is paid an agreed FMV fee for the management services it supplies.

Compensation is structured as fixed FMV MSA fees only — not revenue-share, not commission, not profit-split. This is non-negotiable for Anti-Kickback Statute (AKS) and Stark Law compliance. The partner is paid for services rendered, at fair market value, under a written agreement — the same structure CMS and OIG have endorsed for analogous management-services arrangements for decades. This contractual architecture is similar to the Concert Health Model B partnership pattern that has been used widely for behavioral health integration since CMS introduced the CoCM codes.

The result is an arrangement where the PCP captures the reimbursement, the partner delivers the clinical infrastructure, and both parties operate under a contractual structure designed for federal-program compliance.

Which kinds of practices benefit most from APCM?

The APCM + BHI structure is most economically meaningful for practices with the following profile:

• Independent primary care practices, 1-25 providers. APCM was explicitly designed to address the care-management infrastructure gap for independent primary care. Smaller multi-physician groups capture the most relative value per provider.
• Multi-specialty groups with a primary care core. Any group with a substantial Medicare-eligible primary care patient population can run an APCM program for that segment.
• Federally Qualified Health Centers (FQHCs). The HRSA-aligned mission of FQHCs aligns naturally with APCM’s care-management orientation, particularly for behavioral health integration in underserved populations.
• ACO and MSO networks. Network-wide adoption multiplies the economic impact and aligns directly with ACO benchmark improvement.
• Practices with high Medicare patient mix. Each percentage point of attributable Medicare beneficiaries increases the addressable APCM patient population.
• Practices serving chronic-care populations. Patients with multiple chronic conditions — diabetes, COPD, CHF, mental health comorbidities — are precisely the population APCM is structured to fund care management for.

For segment-specific framing, see APCM for independent practices.

The practices that gain the least are those with low Medicare mix, minimal chronic-care population, or existing care-management infrastructure already operating at high efficiency. APCM is not free money — it is reimbursement for activities that have to actually happen, documented, and audit-defensible.

Why do most practices need a partner to implement APCM + BHI?

The honest answer: because the operational, compliance, and economic complexity is non-trivial, and most practices do not benefit from re-discovering it.

Operational complexity. Building care-management infrastructure in-house requires hiring, training, and retaining clinical staff in a labor market where care managers and BHCMs are scarce and turnover is high. It requires standing up screening protocols, building a patient registry, integrating with the EHR, and structuring the monthly engagement workflow in a way that produces audit-defensible documentation. Practices that try this in-house typically spend 6-12 months in implementation before billing meaningful revenue. An experienced partner can compress that to 30-60 days.

Compliance complexity. AKS, Stark, HIPAA, and state behavioral health licensing each apply at different layers. Structuring an FMV MSA correctly requires healthcare-attorney involvement and an understanding of how OIG advisory opinions have treated analogous arrangements. Errors are not small — they can rise to federal-program-integrity issues.

Economic complexity. Tier-determination accuracy, screening-administration discipline, and documentation quality determine whether APCM revenue actually materializes. A well-run partner has refined these workflows across dozens of implementations and brings that operational learning to each new practice. A DIY implementation has to develop those workflows from scratch.

Time complexity. The opportunity cost of a 6-12 month DIY implementation — measured in foregone revenue, distracted clinical leadership, and unbilled patient encounters — is often larger than the entire cost of a partner-led implementation.

For most practices, the rational path is partner-led implementation. The math is straightforward: a partner that has executed APCM + BHI implementations at scale brings infrastructure, compliance posture, and operational learning that an individual practice cannot economically replicate. The fixed FMV MSA pays the partner for that infrastructure; the PCP captures the reimbursement; both parties operate under a structure designed for federal compliance.

If APCM looks economically interesting for your practice, the highest-leverage next step is a discovery conversation with an experienced partner. See if APCM fits your practice.

Frequently Asked Questions

Related reading

• Does APCM fit your practice? — honest assessment framework for practice fit
• APCM for independent practices — segment-specific economic and operational framing
• APCM vs. CCM: what changed — code-by-code comparison of bundled vs. predecessor structure
• APCM billing complexity — why APCM billing requires expertise
• APCM revenue potential in 2026 — financial value framing
• The value of APCM + BHI integration — why integrated behavioral health matters in the APCM context
• Glossary: APCM, CCM, BHI, PMPM