What is prior authorization in home care?

Prior authorization in home care is the process by which a Medicaid MCO or state Medicaid program approves a specific amount of home care services — a number of hours per week or units per month — for a specific client before those services can be delivered and billed. Every Medicaid home care service must be authorized in advance. Delivering services without a current, valid authorization, or delivering more units than the authorization allows, results in claim denials that cannot be reversed. Prior authorization is issued based on the client's assessed level of care and care plan, and must be renewed periodically — typically every 90 to 180 days.

How do I track prior authorizations for home care clients?

Effective prior authorization tracking requires a system that captures, for each client: the authorization number, the authorized service code and rate, the authorization start and end date, the total authorized units or hours for the period, and the units already scheduled and delivered to date. The gap between authorized hours and scheduled hours is where authorization drain occurs — most agencies are delivering fewer hours than the client is authorized to receive, losing revenue that was already approved. At minimum, you need a spreadsheet or system that compares authorized hours against scheduled hours by client, updated weekly. At 15 patients, this is manageable manually. At 30 patients, the volume makes manual tracking unreliable and gaps start appearing.

What happens when a prior authorization expires in home care?

When a prior authorization expires, services delivered after the expiration date are not billable. If a caregiver provides a visit on a date when the authorization has expired — even if the renewal is pending, even if the client still clearly needs the service — the claim for that visit will be denied. Most MCOs do not retroactively authorize services delivered during an expired authorization period except in rare circumstances involving documented payer error. The practical result is that the caregiver was paid for a visit your agency cannot bill. Renewal must be initiated before the current authorization period ends — typically 30 days before expiration to account for MCO processing time.

How much revenue do home care agencies lose to authorization gaps?

At a 30-patient Medicaid home care agency, authorization-related revenue loss typically runs around $2,400 per month. This comes from three sources: authorized hours that go unscheduled (the client was approved for 20 hours per week but consistently receives 14 because the scheduling system is not comparing against the authorization), services delivered after an authorization has expired (the renewal was late and the visits in the gap are unbillable), and authorizations that are reduced or denied on renewal because documentation supporting the original care hours was insufficient. The $2,400 figure is not a billing error — it is revenue that was already approved by the payer and simply not captured by the agency.

How do I manage prior authorization renewals for home care clients?

Prior authorization renewal requires initiating the renewal request before the current authorization period ends — typically 30 days before the expiration date to allow for MCO processing time. The renewal process usually requires: an updated care plan reflecting the client's current needs, supporting documentation from a nurse assessment or supervisory visit conducted within a specified timeframe, and any required clinical notes or physician orders depending on the MCO and service type. Build a renewal calendar that flags each authorization 45 days before its expiration date. At 30 patients, you will have renewals due every week. Without a calendar-based reminder system, renewals will be missed, authorizations will lapse, and services delivered during the gap will be uncompensated.

Can a home care agency bill for services delivered after an authorization expires?

Generally, no. Services delivered after an authorization expires cannot be billed to Medicaid, and most MCOs will not retroactively authorize those services. There are narrow exceptions: some MCOs will consider retroactive authorization if you can demonstrate that the renewal request was submitted timely but not processed due to an MCO administrative error, or if a sudden change in client condition created a care necessity that could not be anticipated. These exceptions are uncommon and require specific documentation. The reliable approach is preventive: initiate every renewal at least 30 days before expiration, track the MCO's processing timeline, and do not schedule visits beyond the current authorization end date until the renewal is confirmed.

Prior Authorization in Home Care — Agency Guide

How It Works

What Prior Authorization Is and Why It Matters for Your Revenue

Prior authorization is the MCO's or state Medicaid program's pre-approval of a specific amount of home care services for a specific client. The authorization specifies: the client, the service type and procedure code, the number of approved hours or units per week or per month, and the authorization period — a start date and end date, typically 90 to 180 days. Before any caregiver can provide a service and before you can bill for it, that service must be covered by a current, valid authorization.

That's the compliance piece. The revenue piece is where most agencies run into trouble. Authorization management involves three things that most agencies do not have systems to handle consistently: tracking authorized hours against delivered hours so you capture everything the client is approved to receive; monitoring authorization expiration dates so services are never delivered in a gap; and managing renewal documentation so authorizations are not reduced or denied at renewal for lack of supporting evidence.

At 30 patients, a single spreadsheet can technically track all three. Whether anyone has time to update and act on it is a different question — and at most agencies, the answer is no. That's where the $2,400 per month goes.

Where the Revenue Goes

The Three Sources of Authorization Drain

Authorization drain is not one problem. It is three distinct problems that compound each other. Most agencies have all three — and most have never calculated the total because each individual instance seems small.

Underutilized Authorized Hours

A client is authorized for 20 hours per week. Your scheduler, working off memory and a whiteboard, consistently places them for 14. The client is not objecting. The caregiver shows up. The billing is clean. And every week, you leave six hours of authorized revenue uncaptured — revenue the MCO already approved. At one client and one average Medicaid rate of $18–22/hour, that's $108–132 per week per client. Across 10 clients with similar gaps, it's over $1,000 per week in already-approved revenue that evaporates.

This drain is invisible unless you are running a weekly comparison of authorized hours against scheduled hours by client. Most agencies are not. The scheduling system and the authorization tracking system — if they exist at all — are separate, and no one is reconciling them regularly.

Lapsed Authorizations — The Expiration Gap

An authorization expires on March 31. The renewal request was submitted March 28, but the MCO takes 15 business days to process. The caregiver continues working with the client in April because the client needs care and no one told her to stop. The claims for those April visits deny. The MCO will not retroactively authorize the gap. The caregiver's time was paid. The visits are unrecoverable.

This is not a rare occurrence at agencies without calendar-based authorization tracking. It happens every month, for different clients, in the background. The billing person submits the claim, the denial comes back with CO-15, and the agency writes it off because fighting it would require retroactive authorization that the MCO won't grant. Initiating renewals 30–45 days before expiration, not 3 days before, is the only prevention.

Authorization Reductions at Renewal

The initial authorization for a client was 20 hours per week. At the 90-day renewal, the MCO's reviewer reduces it to 14 hours. The reason, buried in the renewal denial, is that the nurse assessment submitted at renewal did not reflect an updated level of care — it was a copy of the original assessment from intake, unchanged, with a new date. The functional decline that had occurred over 90 days was not documented, so the MCO had no clinical basis to maintain the original authorization level.

Authorization reductions at renewal are often preventable with timely, substantive clinical documentation. A nurse assessment that reflects the client's current condition — not a template from six months ago — is the clinical basis on which the MCO makes its renewal decision. Agencies that treat nurse assessments as paperwork rather than revenue documents lose hours at renewal that they would have kept with thorough documentation.

The Math

~$2,400 Per Month in Authorization Drain at a 30-Patient Agency

Here is what the three drain sources look like at a 30-patient agency at typical Georgia or Texas Medicaid rates of $18–22 per hour for personal care services.

Underutilized authorized hours — 8 clients averaging 4 hrs/week short

$20/hr × 4 hrs × 4 weeks

$1,280

Authorization gap visits — 2 clients averaging 3 visits unbillable per lapse

$20/hr × 3 hrs × 2 clients

$480

Authorization reductions at renewal — 3 clients losing avg 2 hrs/week

$20/hr × 2 hrs × 4 weeks × 3 clients

$480 ongoing

Approximate monthly authorization drain

—

~$2,400/month

The assumptions above are conservative. Agencies with higher denial rates, more complex MCO mixes, or higher average Medicaid rates will see larger figures. The point of the math is not the exact number — it is the structure. Most of this revenue is already approved. It is not a billing dispute. It is operational capacity that was never deployed against already-approved opportunity.

At 90 patients — Denise's scale — these numbers multiply. Three times the clients does not produce three times the drain exactly, because some inefficiencies are fixed costs. But authorization drain at 90 patients without systematic tracking is almost certainly in the $6,000–$8,000 per month range. That is real money at any margin level.

The System

What Effective Authorization Tracking Actually Requires

Authorization tracking is not a one-time task. It is a weekly operational function that requires five things happening consistently and in coordination.

Centralized Authorization Records

Every active authorization for every client — authorization number, service code, start date, end date, total approved units, and units delivered to date — in a single system. Not a fax in a folder, a PDF in a binder, and a spreadsheet that gets updated when someone has time. One system, current as of today.

Weekly Hours Reconciliation

A weekly comparison of authorized hours per client against scheduled hours for the current authorization period. Gaps that exceed 5% of authorized hours should be flagged and explained — either the client declined service (document it) or the scheduling system undermatched (correct it). This reconciliation does not happen unless someone owns it and runs it weekly.

Renewal Calendar with 45-Day Lead

Every authorization expiration date on a calendar, with an alert 45 days before. The renewal process is initiated at the 45-day mark. The MCO's average processing time is tracked. If the MCO takes 20 business days on average, a 45-day lead provides adequate buffer — a 3-day lead does not.

Scheduling That Reads Authorization Limits

Your scheduling system needs to know what each client is authorized to receive before it builds the schedule. A scheduler working off memory will not consistently hit the authorization ceiling. A system that flags "this client has 6 authorized hours remaining this week and is currently scheduled for 4" will. The gap between those two approaches is the underutilization drain.

Clinical Documentation That Supports Renewal Levels

Nurse assessments and care plans should reflect the client's current functional status — not a template carried forward from intake. The MCO reviewer makes the renewal authorization decision based on the documentation submitted. Documentation that accurately reflects functional decline supports maintaining or increasing authorization levels. Documentation that reflects nothing new gives the reviewer no clinical basis to approve what was previously approved.

Authorization-to-Billing Matching

Every claim submitted must reference a valid, current authorization number. The authorization must be active on the date of service, the service code must match the authorized code, and the units claimed must not exceed the remaining authorized units for the period. A billing function that does not verify these three things before submission creates preventable CO-15 denials with every batch.

About CareBravo

Authorization Management as a Connected Function, Not a Side Task

Authorization management is where scheduling, clinical documentation, and billing intersect. A gap in any one of those three functions creates authorization drain in a different form — underutilized hours, expired authorizations, or renewals denied for lack of documentation. The only way to close all three drains simultaneously is for those three functions to operate from the same data, not from three separate systems and a spreadsheet.

CareBravo's authorization management function connects directly to scheduling, nurse documentation, and billing. Authorized hours are visible in the scheduling function before the schedule is built. Renewal alerts are generated automatically based on authorization expiration dates. Billing verifies the authorization number and remaining units before claims are submitted. Nurse assessments feed the renewal process with current clinical documentation instead of requiring someone to remember to update them in time.

You receive the output: scheduled hours that capture what clients are authorized to receive, renewals initiated before authorizations lapse, and billing that doesn't submit claims against expired authorizations. 100+ agencies. 73% average revenue growth. No added back-office hires. Authorization management that actually runs is a meaningful part of how that result happens.

CareBravo scheduling function → CareBravo billing function → Nurse documentation function →

Questions

Common Questions About Prior Authorization in Home Care

Prior authorization is the MCO's or state Medicaid program's pre-approval of a specific amount of home care services for a specific client before those services can be delivered and billed. Every Medicaid home care service must be authorized in advance. The authorization specifies the client, service type and procedure code, approved hours or units per week or month, and the authorization period — typically 90 to 180 days. Delivering services without a current, valid authorization, or delivering more units than authorized, results in claim denials. Authorization must be renewed before the current period ends, and the renewal process requires clinical documentation of the client's current level of care.

Effective authorization tracking requires capturing, for each client: the authorization number, authorized service code, start and end dates, total approved units for the period, and units delivered to date. The gap between authorized and delivered hours is where underutilization drain occurs. At minimum, a spreadsheet updated weekly can handle this at 15 patients. At 30 patients, manual tracking becomes unreliable and gaps start appearing. The system needs to compare authorized hours against scheduled hours by client weekly — that comparison is the primary mechanism for catching underutilization before the authorization period closes and the uncaptured hours are permanently lost.

Services delivered after an authorization expires are not billable to Medicaid. Even if the client still clearly needs the care and the renewal is pending, visits provided during the expiration gap will deny. Most MCOs will not retroactively authorize services delivered during a lapsed authorization period except in rare circumstances involving documented MCO administrative error. The caregiver's time is paid; the visits are unrecoverable. Prevention is the only reliable solution: initiate every authorization renewal at least 30–45 days before the expiration date, track the MCO's typical processing time, and do not schedule visits beyond the current authorization end date until renewal is confirmed in writing.

At a 30-patient Medicaid home care agency, authorization-related revenue loss typically runs around $2,400 per month. This comes from three sources: underutilized authorized hours (clients authorized for more hours than they are being scheduled), services delivered during expired authorization periods, and authorization reductions at renewal due to insufficient clinical documentation. The $2,400 figure represents revenue the MCO already approved and your agency simply did not capture — it is not a billing dispute, it is an operational gap. At 90 patients, the total is proportionally larger and typically in the $6,000–$8,000 per month range without systematic tracking.

Preventing authorization-related billing denials requires four things operating consistently: a centralized record of every active authorization with current unit counts, a scheduling system that reads authorization limits before building the schedule, a renewal calendar that flags expirations 45 days in advance, and a billing function that verifies the authorization number and remaining units before every claim is submitted. Each of these is a separate operational function. At most small agencies, none of them are fully systematized — the authorization information is in a spreadsheet someone updates irregularly, the scheduler works from memory, renewals are tracked on a calendar that may or may not get checked, and billing submits without an authorization pre-check. The denials that result are predictable and preventable.

Generally, no. Services delivered after an authorization expires cannot be billed to Medicaid, and most MCOs will not retroactively authorize those services. There are narrow exceptions when you can demonstrate that the renewal request was submitted timely but not processed due to documented MCO administrative error — but this requires specific documentation and a formal appeal, and MCOs rarely grant it. The practical answer is prevention: initiate every renewal at least 30 days before expiration, track the MCO's processing timeline, and do not schedule visits beyond the current authorization end date until renewal is confirmed. For a broader guide to billing denial prevention, see the Medicaid home care billing guide.