Advanced Primary Care Management (APCM): CMS HCPCS Codes G0556, G0557 & G0558, Service Elements, and Billing Rules

Advanced Primary Care Management (APCM) is a monthly, non-time-based Medicare reimbursement framework established by the Centers for Medicare & Medicaid Services (CMS) in the Calendar Year (CY) 2025 Medicare Physician Fee Schedule Final Rule (CMS-1807-F, effective January 1, 2025). Billed using three patient-complexity-stratified HCPCS codes—G0556, G0557, and G0558—APCM bundles elements of Chronic Care Management (CCM), Principal Care Management (PCM), Transitional Care Management (TCM), and Communication Technology-Based Services (CTBS) into a single monthly care management payment without requiring minute-by-minute staff time tracking.

What Is Advanced Primary Care Management (APCM)?

Advanced Primary Care Management is a foundational Medicare Part B care management bundle designed for physicians and non-physician practitioners (NPs, PAs, CNSs, CNMs) who serve as the continuing focal point for all of a beneficiary’s primary care services.

Prior to CY 2025, primary care practices delivering longitudinal care outside face-to-face office visits had to track discrete stopwatch thresholds across separate CPT codes (such as 20 minutes of clinical staff time per calendar month for CPT 99490 CCM, 30 minutes for CPT 99426 PCM, or 5–20 minutes for virtual check-ins and e-visits). CMS designed APCM to eliminate per-patient monthly minute logging by shifting oversight to patient clinical/social complexity tiers and practice-level advanced primary care capabilities.

APCM Codes Compared: G0556 vs. G0557 vs. G0558

CMS stratifies APCM billing into three monthly HCPCS G-codes based on the beneficiary’s chronic condition burden and Qualified Medicare Beneficiary (QMB) dual-eligibility status.

The table below details the official CMS code descriptors, patient eligibility criteria, work Relative Value Units (RVUs), and approximate 2025 national non-facility Medicare allowances for G0556, G0557, and G0558:

HCPCS Code	APCM Tier	Patient Clinical & Social Eligibility Criteria	CY 2025 Work RVU	Approx. National Non-Facility Payment
G0556	Level 1 APCM	Patient with one or fewer (0 or 1) chronic conditions receiving ongoing primary care from the billing practitioner/practice, per calendar month.	0.25	~$15 / month
G0557	Level 2 APCM	Patient with two or more (≥2) chronic conditions expected to last at least 12 months (or until death) that place the patient at significant risk of death, acute exacerbation/decompensation, or functional decline, per calendar month.	0.77	~$50 / month
G0558	Level 3 APCM (QMB)	Patient with two or more (≥2) chronic conditions (meeting Level 2 clinical criteria) who is also a Qualified Medicare Beneficiary (QMB) enrolled in Medicaid cost-sharing protection, per calendar month.	1.67	~$110 / month (Zero patient Part B coinsurance)

Required APCM Service Elements and EHR Capabilities

Unlike time-based CCM codes, APCM does not require every clinical sub-task to be performed in every calendar month, but the billing practice must maintain operational capability to furnish all 13 CMS-defined advanced primary care elements whenever clinically indicated for the enrolled patient.

Under CMS-1807-F, practices billing G0556, G0557, or G0558 must implement and document the following operational workflows in their clinical documentation and EHR environment:

1. Patient Consent & Cost-Sharing Disclosure: Before billing APCM, the practice must obtain and document written or verbal patient consent in the medical record confirming that the patient understands (a) what APCM services entail, (b) that only one practitioner can furnish and bill APCM during a calendar month, (c) that the patient may stop APCM at any time effective at the end of the calendar month, and (d) that standard Medicare Part B deductible and 20% coinsurance apply (except for QMB patients billed under G0558, who are statutorily exempt from Medicare cost-sharing).
2. Initiating Visit Requirement (When Applicable): An initiating E/M visit, Annual Wellness Visit (AWV), or Initial Preventive Physical Examination (IPPE) is required only if the patient is new to the practitioner or has not been seen within the past 3 years—unless the patient was already receiving CCM, PCM, or another care management service from the same practice within the prior 12 months.
3. 24/7 Access for Urgent Needs & Care Continuity: The practice must provide 24/7 patient access to a care team member who has real-time electronic access to the patient’s medical record, plus the ability to schedule successive routine appointments with a designated primary care team member.
4. Comprehensive Care Management & Electronic Care Plan: Includes systematic assessment of medical and psychosocial/SDOH needs, preventive services tracking, medication reconciliation and self-management oversight, and maintenance of an electronic, patient-centered care plan ( mandatory for G0557 and G0558, and as clinically indicated for G0556) shared with the patient/caregiver and accessible across the care team.
5. Management of Care Transitions & Enhanced Communication: Requires timely electronic exchange of health information and post-discharge follow-up after Emergency Department visits, hospital admissions, or Skilled Nursing Facility (SNF) stays, plus asynchronous digital communication (patient portal messaging, e-visits, and virtual check-ins).
6. Population Health Management & Quality Performance Measurement: The practice must risk-stratify its patient panel to identify care gaps and actively participate in quality and total-cost-of-care measurement—satisfied either by participating in a CMS Innovation Center / Shared Savings model (such as the Medicare Shared Savings Program [MSSP], ACO REACH, Making Care Primary [MCP], or AHEAD) or by reporting the Value in Primary Care MIPS Value Pathway (MVP).

How Is Advanced Primary Care Management Used in Clinical Research and Healthcare?

In primary care operations and health services research, APCM serves as a hybrid payment bridge between fee-for-service encounter billing and prospective primary care capitation—requiring strict EHR claim-scrubbing rules to prevent prohibited concurrent billing.

Because APCM bundles multiple care management and communication services into a single monthly code, revenue cycle and EHR billing rules must enforce CMS’s concurrent billing matrix during the same calendar month for the same beneficiary:

• Services Bundled Into APCM (Cannot Be Billed Concurrently by the Same Practice):
  • Chronic Care Management (CCM): CPT 99490, 99439, 99491, 99437, 99487, 99489.
  • Principal Care Management (PCM): CPT 99424, 99425, 99426, 99427.
  • Transitional Care Management (TCM): CPT 99495, 99496 (if furnished by the same practitioner/TIN).
  • Communication Technology-Based Services (CTBS): Virtual check-ins (G2010, G2012, G2252), online digital E/M e-visits (CPT 99421–99423), and interprofessional consultations (CPT 99446–99449, 99451, 99452).
• Services Permitted Concurrently With APCM (When Medically Necessary & Non-Duplicative):
  • Remote Physiologic Monitoring (RPM) (CPT 99453–99458) and Remote Therapeutic Monitoring (RTM) (CPT 98975–98981).
  • Community Health Integration (CHI, G0019–G0022), Principal Illness Navigation (PIN, G0023–G0024), and Caregiver Training Services (CTS).
  • Behavioral Health Integration (BHI, CPT 99484) and Psychiatric Collaborative Care Management (CoCM, CPT 99492–99494), as well as face-to-face or telehealth office E/M visits (CPT 99202–99215) and Annual Wellness Visits (G0438, G0439).