Navigating the healthcare maze is hard for anyone, and much harder for a patient facing a serious illness. A new cancer diagnosis or heart failure admission brings specialist referrals, tests, prior authorizations, medication changes and bills, often from organizations that do not talk to each other.
This guide is for practice and health system leaders, care management directors and the teams building navigation software. It explains what patient navigators do, how Medicare's Principal Illness Navigation codes pay for that work, who qualifies, what must be documented, and what a navigation program needs from its software to run well and bill correctly.
What is patient navigation?
Running a navigation or care management program?
Agnotic builds care management software for navigation workflows, time tracking and billing-ready documentation.
Patient navigation is a service in which a trained navigator guides a patient with a serious illness through diagnosis, treatment and the systems around them, helping with appointments, referrals, communication with clinicians, and social or financial barriers. Medicare pays for it through the Principal Illness Navigation codes.
Navigation began in cancer care, where patients facing complex treatment plans were dropping out between diagnosis and first treatment. The model has since spread to other serious conditions, such as heart failure, kidney disease, dementia and serious mental illness, where the care pathway is similarly complex.
Why do patients get lost in the healthcare maze?
Patients get lost because serious illness spreads care across many providers, settings and payers, and no single person is responsible for keeping the plan together. Each organization does its part well, but the gaps between them fall to the patient and family.
- Fragmented care: Specialists, imaging, labs, pharmacies and hospitals each with their own scheduling and records.
- Information overload: New terms, treatment options and instructions arriving during a stressful period.
- Administrative barriers: Referrals, prior authorizations and insurance questions that delay treatment.
- Social needs: Transportation, caregiving, work and housing issues that make appointments hard to keep.
- Financial worry: Uncertainty about costs that leads some patients to postpone care.
The result is missed appointments, delayed treatment and avoidable hospital visits. These are the outcomes navigation programs aim to reduce, and they are also the measures leaders should track to show a program's value.
What do patient navigators do?
Patient navigators help patients understand and move through their care plan. They do not provide clinical treatment, but they coordinate, explain, connect and follow up, working under the direction of the billing practitioner and alongside the clinical team.
- Person-centered assessment: Understanding the patient's goals, preferences, strengths and barriers.
- Care coordination: Scheduling, reminding and confirming appointments across providers.
- Communication help: Preparing patients for visits and helping them share concerns with clinicians.
- System navigation: Explaining insurance, referrals and how to reach the right service.
- Community resources: Connecting patients to transportation, support groups and financial help.
- Self-advocacy: Building the patient's confidence to manage their own care over time.
What are the Principal Illness Navigation codes?
The Principal Illness Navigation codes are Medicare HCPCS codes for navigation services provided by auxiliary personnel, such as navigators and community health workers, under the general supervision of a billing practitioner. They pay for time spent helping a patient with a serious, high-risk condition.
- G0023: Principal Illness Navigation services, first 60 minutes per calendar month.
- G0024: Each additional 30 minutes per calendar month, billed with G0023.
- G0140: Principal Illness Navigation, Peer Support (PIN-PS), first 60 minutes per calendar month.
- G0146: Each additional 30 minutes of PIN-PS per calendar month.
The peer support codes are designed for behavioral health conditions, where a peer support specialist with lived experience provides the service. CMS states that PIN and PIN-PS should not be billed concurrently for the same serious, high-risk condition.
Medicare does not pay navigators directly. The services are billed incident to the practitioner who performed the initiating visit, and that same practitioner must bill the navigation. Navigators can be employed by the practice or work for a community-based organization under contract, as long as incident-to requirements are met, and they can work with patients by phone or video as well as in person.
Which patients qualify for PIN services?
Patients qualify when they have a serious, high-risk condition expected to last at least 3 months that puts them at significant risk of hospitalization, nursing home placement, acute exacerbation or decompensation, functional decline or death. The condition must require development, monitoring or revision of a disease-specific care plan.
PIN services must follow an initiating visit with the billing practitioner, such as an evaluation and management visit, during which the practitioner identifies the need for navigation. The practitioner then directs the navigation work, and the navigator's time counts toward the monthly codes.
CMS gives examples including cancer, chronic obstructive pulmonary disease, congestive heart failure, dementia, HIV/AIDS, severe mental illness and substance use disorder. The test is the condition's severity and the complexity of the care plan, which may need frequent medication changes or substantial help from a caregiver, not the diagnosis name alone.
The initiating visit has its own rules. It can be an evaluation and management visit personally performed by the practitioner who will bill PIN, other than a low-level visit that clinical staff can perform, and the visit included in transitional care management can qualify. An annual wellness visit can serve if that same practitioner identifies a qualifying condition. Emergency department and inpatient visits cannot, because the practitioner there will not go on to provide the navigation.
A patient can receive more than one PIN service at a time when the services address different conditions or come from different practitioners. A single practitioner, however, can bill PIN only once per month for any one serious condition.
What documentation do PIN services need?
PIN services need documented patient consent, the initiating visit and the practitioner's identification of the serious illness, records of the navigator's activities and time, and evidence of the navigator's training. Time is counted per calendar month and per condition.
- Consent: Written or verbal agreement documented in the record, obtained before or when services start and renewed annually, with a new consent if the billing practitioner changes.
- Initiating visit: The visit and the practitioner's note establishing the serious illness and a treatment plan that includes navigation.
- Activity log: What the navigator did, on which date and for how long.
- Training: Records showing the navigator meets state requirements or, for peer support where a state has none, training consistent with SAMHSA's National Model Standards for Peer Support Certification.
- Supervision: The billing practitioner who provides general supervision.
Time tracking is where programs most often lose revenue. Navigators who log activities at the end of the week round down or forget calls, and months fall short of the 60-minute threshold even when the work was done. Logging in real time, inside the workflow, fixes most of this.
How does PIN fit with other care management services?
PIN sits alongside chronic care management, principal care management, transitional care management and community health integration. Each has its own eligibility rules, and CMS guidance describes which services may be billed in the same month. Programs should design their workflows so each patient is enrolled in the service that matches their needs.
As a rule of thumb, principal care management and PIN both focus on one serious condition, chronic care management on two or more chronic conditions, transitional care management on the weeks after discharge, and community health integration on social needs that affect a medical problem. A patient may move between them as their situation changes.
Software helps by checking eligibility and recording which services a patient is enrolled in, so staff do not have to remember which combinations are allowed in a given month or which practitioner holds each service.
What software does a navigation program need?
A navigation program needs software that identifies eligible patients, records consent and the initiating visit, gives navigators a shared work queue, tracks time automatically, connects to the EHR and community resources, and produces billing-ready monthly summaries.
- Patient identification: Lists of patients with serious illnesses and recent initiating visits who are not yet enrolled.
- Enrollment workflow: Consent capture and care plan creation linked to the practitioner's note.
- Work queue: Tasks for navigators prioritized by upcoming appointments, missed visits and open barriers.
- Time capture: Timers and activity logs that count toward monthly thresholds per condition.
- Resource directory: Community services with referral tracking and follow-up.
- Billing summary: A monthly report showing which patients met which codes, ready for review.
EHR integration matters because navigators need to see upcoming appointments, recent results and clinician notes, and clinicians need to see what navigators have done. A separate tool that nobody else can see turns the navigator into another silo.
Where navigation programs fall short
- Unclear eligibility: Navigators enrolling patients who do not meet the serious illness criteria.
- Missing initiating visit: Services started before the practitioner documents the need.
- Lost time: Activities logged late or not at all, so monthly thresholds are missed.
- Untracked training: No record of navigator training when an auditor asks.
- No outcome data: Programs unable to show fewer missed appointments or admissions.
Caseload balance is another quiet failure. A navigator with too many patients spends the month reacting to crises and has little time for the planning and follow-up that prevent them. Work queues that show each navigator's active patients, open barriers and upcoming deadlines help managers spread the load before quality drops.
Expiring consent is easy to miss as well. Because consent must be renewed each year, the system should flag patients whose consent is about to lapse so navigators can renew it during a routine contact.
How Agnotic can help
Navigation programs succeed when navigators spend their time with patients, not with paperwork. Agnotic Technologies builds care management software for navigation, including eligibility lists, consent and enrollment workflows, navigator work queues and automatic time capture tied to the PIN and PIN-PS codes.
Agnotic also integrates these tools with EHRs and community resource platforms, and builds monthly billing summaries and outcome dashboards that show how navigation affects missed appointments, time to treatment and hospital use.
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