TAR 101: A Nurse’s Gateway into Prior Authorization

Introduction

TAR stands for Treatment Authorization Request. In Medi-Cal, it is the request a provider submits to get a service approved for payment, usually before the service is provided. It is California’s version of prior authorization.

If you’re a nurse who’s never worked in utilization management or prior authorization, “TAR” might sound like jargon. But in many public programs (especially Medi-Cal in California), a Treatment Authorization Request (TAR) is the key that unlocks whether a service gets approved and paid.

By the end of this post, you’ll be able to:

• Explain what a TAR is (in simple terms)
• Understand why it matters for both patients and payers
• See the basic workflow of TAR review
• Recognize common pitfalls and how to avoid them

If you stick around, you’ll also start to see how learning TAR logic sharpens your clinical thinking — and becomes a differentiator in your nursing career.

What is a TAR (in plain terms)

Think of a TAR as a “permission slip” that a provider must send before (or sometimes during) a specific service is done. The payer — e.g. Medi-Cal — reviews whether the planned service meets criteria (such as benefit coverage, medical necessity, or evidence standards) and then says “yes,” “no,” or “partial approval.”

In Medi-Cal:

• Many elective or nonemergency services require TAR approval before the claim is submitted (or in advance of rendering the service) (California Department of Health Care Services [DHCS]).
• Providers can submit either electronic TAR (eTAR) (preferred) or paper TAR when eTAR is not available (DHCS, n.d.-a).
• Different settings use different TAR forms:
    • The 50-1 TAR form is commonly used for outpatient medical and pharmacy services.
    • Long-term care (nursing facility) uses a 20-1 TAR (LTC TAR) in Medi-Cal fee-for-service settings (DHCS, n.d.-b).
    • Some inpatient stays may also require TAR or extensions, depending on reimbursement methodology (DHCS, n.d.-a).

So, TAR is not a mystical process — it’s a structured request and review mechanism embedded in Medi-Cal policy.

Reviewing a TAR well uses the same skill as any medical necessity review: match the documentation to the criteria, then explain your reasoning clearly. That is exactly what my utilization review course for nurses teaches, step by step.

Why TAR / Prior Authorization Exists — The Balancing Act

At its core, TAR is a specific version of prior authorization (PA) or utilization management (UM). The idea is to guard against unnecessary, unsafe, or low-value services, while still allowing access to needed care.

Advantages / rationale:

• Helps ensure that requested care is medically necessary and within benefit scope (so the payer isn’t paying for services without justification)
• Can help reduce waste, duplicative services, or overly expensive choices
• Encourages provider accountability and clarity in documentation

But there are tradeoffs—several peer-reviewed and policy analyses show real consequences:

• Providers sometimes change their clinical orders not because it’s best for the patient, but to avoid the authorization burden (i.e., pick a “safe path” rather than a clinically optimal but harder path) (Shanbhag et al., 2023).
• Authorization delays lead to slower access, abandoned care, and worse outcomes — in some AMA surveys, 78% of physicians reported patients abandoning recommended treatment because of PA burdens, and 94% cited delays in care (American Medical Association [AMA], 2024). 
• Prior authorization not done well (e.g., excessive bureaucracy, opaque criteria) contributes to burnout, inefficiency, and strain in the health system. (Kyle & Song, 2023).
• Efforts to simplify prior authorization carry cost implications—some analyses warn that easier access may increase utilization (Kyle & Song, 2023)

In short: TAR is not about obstruction. Done right, it’s a guardrail. Done poorly, it becomes a barrier.

TAR Review Workflow — Step by Step for the Novice Nurse

Here’s how the TAR review process typically plays out. As you grow in UM, you’ll see many variations, but this gives a solid foundation.

1. Intake & Benefit Check

• Confirm patient eligibility (e.g. active Medi-Cal status).
• Check whether the requested service is in the “TAR-required” list (or whether it’s exempt).
• Identify which TAR form or eTAR pathway to use.

2. Gather Clinical Documentation

• Request relevant medical records: history, labs, imaging, progress notes.
• Ask for provider rationale or narrative, especially if borderline.
• Avoid dumping everything — target what supports justification.

3. Apply Criteria / Medical Necessity Logic

• Use payer policy or internal criteria as a guide.
• The nurse reviewer can approve simpler cases; escalate complex or high-cost cases to a physician reviewer or medical director.
• Document exactly which data points map to criteria.

4. Decision & Communication

• Approve / deny / partially approve.
• Write a clear rationale — this is the foundation for appeals.
• Notify the provider (and sometimes member, depending on rules).

5. Appeals / Reconsiderations

• If denied, providers can submit appeals within regulatory time limits.
• Supply new or clarifying evidence.

6. Audit & Feedback

• Monitor patterns (frequent denials, missing documentation fields).
• Use learnings to coach clinical teams, refine templates, or improve intake processes.

By doing this over and over, your intuition for what “good vs. weak” TARs look like improves dramatically.

What Makes a TAR Request Strong

Let me share some principles (with real-world relevance) to help you recognize — or build — a TAR that stands up to scrutiny:

• Relevance & precision: Don’t bury your argument in a sea of documents.
• Evidence / guideline alignment: The stronger your alignment with accepted clinical literature, payer policy, or guidelines, the less room for subjective denial.
• Completeness: Missing signatures, dates, outdated labs, or wrong form versions are frequent denial triggers.
• Matching codes: The procedure / diagnosis codes must align with what’s in the TAR.
• Timeliness: Use the “urgent” flag when clinically justified.
• Clarity of narrative: Use direct language, avoid ambiguity, and explain “why,” not just “what.”

Common Pitfalls (and How to Avoid Them)

Here are a few traps I see with new UM nurses or authorizers, and how to sidestep them:

• Using outdated TAR forms — Always check for the current version.
• Submitting incomplete documentation — If you don’t have the “why,” reviewers default to denial.
• Code mismatches between TAR and claim — Ensure consistency.
• Assuming “clinical judgment only” is enough — That often isn’t enough without supporting evidence.
• Late or retroactive submissions — Some services must be authorized before delivery.
• Lack of provider education — Many denials come from providers unfamiliar with payer logic.

By anticipating these pitfalls, you’ll elevate your review quality quickly. Reading TARs and wondering whether you could do this work full time? Many prior authorization and utilization review nurses started exactly where you are now, at the bedside. My guide, From Bedside to Utilization Review: How to Become a UR Nurse in 2026, walks you through a 7-step plan, real California pay ranges, and how to rewrite your bedside experience in the words UR recruiters look for.

Why Mastering TAR Is a Career Advantage

When you become fluent in TAR and UM:

• You accelerate patient access by cutting back-and-forths.
• You reduce waste and resubmissions, saving time and money.
• You step into a hybrid role — combining clinical acumen, policy fluency, and process sense.
• You become a resource to providers — the kind of person they seek when they hit a bottleneck.
• You develop confidence in one of the more specialized, less saturated niches in nursing.

If you ever feel stuck or want a sharper lens on TAR logic, keep an eye on MedScholaria — we’ll continue breaking down complex UM topics into nurse-friendly insights.

References 

American Medical Association. (2024, July 18). Exhausted by prior auth, many patients abandon care: AMA survey. https://www.ama-assn.org/practice-management/prior-authorization/exhausted-prior-auth-many-patients-abandon-care-ama-survey 

Centers for Medicare & Medicaid Services / DHCS. (n.d.). Treatment Authorization Request (TAR). California Department of Health Care Services. https://www.dhcs.ca.gov/provgovpart/Pages/TAR.aspx

Medi-Cal TAR Completion for Long Term Care. (n.d.). LTC TAR form 20-1 instructions. https://mcweb.apps.prd.cammis.medi-cal.ca.gov/file/manual?fn=tarcompltc.pdf 

Perceptions of prior authorization burden and solutions. (2024). PMC. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11425057/ 

The Consequences and Future of Prior-Authorization Reform. (2023.). PMC. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10676707/ 

Influence of prior authorization requirements on provider clinical decision making. (2023). PMC. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10403277/ 

Prior authorizations and the adverse impact on continuity of care. (2025). AJMC. https://www.ajmc.com/view/prior-authorizations-and-the-adverse-impact-on-continuity-of-care