When Oscar Health denies a prior authorization, your appeal path depends on who issued the decision. Oscar-internal denials are contested through the Oscar provider portal at provider.hioscar.com — not Availity. EviCore-delegated denials go to EviCore directly, where a peer-to-peer review is the most effective first step. Standard PA decisions arrive within 15 calendar days; urgent decisions within 72 hours.
How Oscar Health's Prior Authorization System Works
Oscar Health routes prior authorization through two separate tracks, and filing an appeal through the wrong one wastes weeks. Most billing teams discover this the hard way after an EviCore denial lands in their queue and they file through Oscar's provider portal — which accomplishes nothing.
Oscar's internal utilization management team reviews most routine and inpatient PA requests. For specialty services — primarily outpatient radiology, cardiology, oncology, and several procedural categories — Oscar delegates prior authorization review to EviCore by Evernorth. The reviewer, the submission portal, and the appeal path differ meaningfully between the two tracks.
Oscar Does Not Use Availity for PA
Unlike UnitedHealthcare, Aetna, and most BCBS affiliates, Oscar Health does not route prior authorization requests through Availity. All Oscar internal PA submissions go through the Oscar provider portal at provider.hioscar.com. EviCore-delegated services go directly to evicore.com. Submitting through the wrong portal delays or loses the request entirely.
Services That Require Prior Authorization from Oscar Health
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Oscar publishes a Prior Authorization List (PAL) for each product line: individual/family (IFP), small group, and Medicare Advantage. The current effective IFP version is the April 2026 PAL (updated from January 2026). The MA PAL is maintained separately at hioscar.com/prior-authorization.
| Service Category | Reviewer | Submission Path | Notes |
|---|---|---|---|
| Outpatient MRI, CT, PET, nuclear medicine | EviCore by Evernorth | evicore.com | Most common EviCore delegation; verify by CPT code in PAL |
| Cardiology procedures | EviCore by Evernorth | evicore.com | Stress tests, echo, cardiac cath — confirm per current PAL |
| Radiation therapy / medical oncology | EviCore by Evernorth | evicore.com | Chemotherapy drug PA runs through pharmacy benefit separately |
| Spine and joint surgery | EviCore by Evernorth | evicore.com | Fusion, arthroplasty, select arthroscopy — PA required |
| Chiropractic (beyond threshold visits) | EviCore by Evernorth | evicore.com | Initial visits often exempt; visit threshold varies by plan |
| Interventional pain management | EviCore by Evernorth | evicore.com | Injections, nerve blocks, SCS — PA required for most codes |
| Sleep studies (PSG, HSAT) | EviCore by Evernorth | evicore.com | Verify code-level requirement in current PAL |
| Inpatient admits and select outpatient surgeries | Oscar internal UM | provider.hioscar.com | Standard pathway; 15-day decision window (standard) |
| Behavioral health (complex or extended care) | Oscar internal UM | provider.hioscar.com | Routine BH visits often exempt; verify by plan and state |
| High-cost durable medical equipment | Oscar internal UM | provider.hioscar.com | Home-care DME and select prosthetics typically require PA |
Always verify against the current PAL at hioscar.com/prior-authorization before submitting — Oscar updates the list quarterly. Filing a PA for a service that no longer requires one, or skipping a PA that does, are both common and avoidable errors.
How to Submit an Oscar Health Prior Authorization Request
All Oscar internal PA requests go through the Oscar provider portal at provider.hioscar.com, or by phone to the provider relations line for your plan type. Oscar does not accept PA submissions through Availity; providers routing Oscar requests through Availity portals will need to resubmit.
For EviCore-delegated services, submit directly to EviCore at evicore.com or by calling EviCore's Oscar-dedicated provider line. An Oscar portal submission will not initiate the EviCore review.
Provider phone numbers by plan type:
- Oscar individual/family plans: 1-855-672-2788
- Oscar small group plans: 1-855-672-2784
- Oscar Medicare Advantage: 1-855-672-2755
- Cigna+Oscar plans: 1-855-672-2789 (EviCore's PA role for Cigna+Oscar ended January 1, 2026 — verify current PA routing with this line before submitting)
Oscar's published PA turnaround times (per hioscar.com/prior-authorization-turnaround-times):
- Standard (non-urgent) pre-service: 24 hours to 15 calendar days
- Urgent/expedited pre-service: 24 to 72 hours
Check Oscar's Clinical Guidelines Before You Submit
Oscar publishes its medical coverage guidelines at hioscar.com/clinical-guidelines. Reviewing the applicable guideline before submitting a PA — and before drafting an appeal — tells you exactly what clinical documentation Oscar or EviCore will require. Addressing those criteria directly in the initial submission reduces the denial rate on first submission.
When Oscar Health Denies Prior Authorization
A PA denial from Oscar is a decision with a structured appeal pathway, not a final answer. The first step is identifying which entity issued the denial — because the appeal routes are entirely separate.
- Oscar internal denial: The denial letter references Oscar's utilization management team and Oscar clinical criteria or InterQual. Appeals go through the Oscar provider portal.
- EviCore denial: The denial letter is issued on EviCore letterhead and cites EviCore clinical criteria. Appeals go directly through EviCore — not Oscar — until EviCore issues a final upheld determination.
Both denial types must include the specific coverage criteria not met. Under ACA transparency requirements (45 CFR § 147.136), you are entitled to the full clinical policy or InterQual criteria on request. Request this in writing before drafting your appeal so you can address the exact standard, not a general rebuttal.
The Oscar Concierge Team Is Not the PA Appeal Contact
Oscar brands its member care navigation service as a "Concierge team." Members can call the Concierge line (1-855-672-2755) to help initiate PA requests on their behalf — this is a member-facing service model, not a provider-facing UM function.
For billing teams and providers appealing a PA denial, the Concierge line is not the correct contact. Calling it to contest a denial typically results in a redirect. Provider PA appeals route through:
- The Oscar provider portal (provider.hioscar.com) for Oscar-internal denials
- EviCore (evicore.com) directly for EviCore-delegated denials
The provider relations lines listed above are the correct contacts for provider PA appeal questions.
How to Appeal an Oscar PA Denial: Step-by-Step
Path A: Oscar Internal PA Denial
Step 1 — Request reconsideration. Submit a written reconsideration through the Oscar provider portal within the window stated in the denial letter. For non-urgent internal PA denials, this is typically 30 to 60 days from denial date — verify the exact deadline in your plan's Evidence of Coverage.
Your reconsideration package should include:
- A cover letter citing each Oscar clinical criterion not met, with a point-by-point clinical rebuttal
- Relevant clinical notes from the most recent encounter(s) supporting the service
- Diagnostic results that substantiate medical necessity (labs, imaging reports, specialist consultations)
- Peer-reviewed literature if the service is newer or non-standard for the indication
- A letter of medical necessity from the treating physician — specific to the denied service, not a generic letter
Step 2 — Request a peer-to-peer review. Oscar permits physician-to-physician peer review before a final appeal determination. Contact Oscar provider relations to schedule the P2P call. The treating physician should lead this call — it is a clinician-to-clinician conversation about the specific case, not an administrative discussion.
Step 3 — Level 1 internal appeal. If Oscar upholds the reconsideration, file a formal Level 1 internal appeal. Oscar must respond within:
- 30 days for non-urgent pre-service appeals
- 72 hours for expedited appeals (urgent medical need with physician attestation)
If Oscar upholds the Level 1 denial, request external independent review. See the external review section below.
Path B: EviCore Prior Authorization Denial
Step 1 — Request a peer-to-peer call immediately. This is the single most effective intervention in an EviCore denial. Request a P2P call through evicore.com as soon as you receive a pending adverse determination notice — before EviCore issues its final decision. The treating physician speaks directly with an EviCore medical director about the clinical rationale. P2P calls typically occur within 1–3 business days of request.
Timing the EviCore P2P Request
Request the peer-to-peer call the same day you receive the pending adverse determination notice. Once EviCore issues a final denial without a P2P call, the reconsideration track narrows significantly. The P2P window closes when the final adverse determination is issued — do not wait.
Step 2 — Submit an EviCore reconsideration. File additional clinical documentation through the EviCore provider portal at evicore.com. EviCore must issue a reconsideration decision within 30 days (standard) or 72 hours (expedited), or sooner under applicable state law.
Step 3 — Oscar final internal appeal. If EviCore upholds the denial, the case returns to Oscar. Contact Oscar provider relations with the EviCore case number and request Oscar's final internal appeal review. Oscar must respond within the standard appeal windows (30 days non-urgent, 72 hours expedited).
If Oscar upholds the EviCore-originated denial through internal appeal, you proceed to external independent review.
External Independent Review Rights After Oscar PA Denials
After exhausting Oscar's internal appeal process, you and the patient have the right to external review by a state-licensed Independent Review Organization under the ACA (45 CFR § 147.136). Oscar cannot waive this right.
- Standard external review: IRO decision within 60 days
- Expedited external review: IRO decision within 72 hours when health is at immediate risk
- Filing deadline: Typically 4 months from the date of the final internal denial — verify your state's specific window
- Binding decision: If the IRO overturns the denial, Oscar must approve coverage
California exception. For fully-insured California plans (administered by Oscar Health Administrators rather than Oscar Management Corporation), file an Independent Medical Review (IMR) through the California Department of Managed Health Care (DMHC) — not the federal external review process. The IMR filing deadline is 6 months from final denial, and DMHC expedited review runs 3 business days.
For full external review mechanics across plan types, see our independent review organization appeal guide.
Oscar PA Denial Timeline Reference
| Stage | Decision Window | Who Acts | Notes |
|---|---|---|---|
| Initial PA decision (standard) | 24 hrs – 15 calendar days | Oscar or EviCore | Per Oscar's published PA turnaround times (hioscar.com) |
| Initial PA decision (urgent) | 24 – 72 hours | Oscar or EviCore | Requires physician attestation of urgent medical need |
| EviCore P2P review | 1–3 business days (request) | EviCore MD + treating MD | Request before final EviCore denial; closes at final determination |
| EviCore reconsideration | 30 days (72 hrs urgent) | EviCore | File additional clinical docs at evicore.com |
| Oscar internal reconsideration | 30 days (standard) | Oscar UM | First step for Oscar-internal denials |
| Oscar Level 1 appeal (non-urgent) | 30 days | Oscar UM | ACA required; follows reconsideration upheld |
| Oscar Level 1 appeal (expedited) | 72 hours | Oscar UM | Physician attestation that delay jeopardizes health |
| External review — standard (non-CA) | 60 days | State-licensed IRO | ACA right · binding on Oscar |
| External review — expedited (non-CA) | 72 hours | State-licensed IRO | Immediate health risk required |
| CA DMHC IMR — standard | 45 days | DMHC-assigned reviewer | CA fully-insured plans only · 6-month filing deadline |
| CA DMHC IMR — expedited | 3 business days | DMHC-assigned reviewer | CA plans; available when delay causes serious harm |
How Muni Appeals Supports Oscar PA Denials
Oscar's split-reviewer model — where some PA denials are Oscar's and others are EviCore's — creates a routing problem that derails appeals before they start. Sending an EviCore denial to Oscar's provider portal, missing the P2P request window, or submitting a reconsideration without addressing the specific criteria cited in the denial are among the most common ways practices absorb recoverable losses.
Muni Appeals maps the Oscar-specific PA workflow:
- Identifies the denial issuer (Oscar internal vs. EviCore) and routes to the correct appeal path
- Compiles clinical documentation requirements tied to the specific guideline or InterQual criteria cited
- Flags P2P request opportunities before the EviCore determination window closes
- Tracks standard and expedited appeal windows for each denied case
- Maintains the Oscar provider portal pathway — not Availity — as the correct submission standard for Oscar-internal PA
Frequently Asked Questions
Does Oscar Health use Availity for prior authorization submissions?
No. Unlike most major payers, Oscar Health does not route prior authorization requests through Availity. Submit Oscar internal PA requests through the Oscar provider portal at provider.hioscar.com, or call the provider relations line for your plan type. For EviCore-delegated services, submit directly at evicore.com. Submitting Oscar PA through Availity will result in an unprocessed request.
How long does Oscar Health take to decide on a prior authorization?
Per Oscar's published PA turnaround times at hioscar.com/prior-authorization-turnaround-times: standard pre-service requests receive a decision within 24 hours to 15 calendar days. Urgent prior authorization requests — where the treating physician attests that delay would seriously jeopardize the patient's health — receive a decision within 24 to 72 hours.
How do I know if my Oscar denial came from EviCore or from Oscar directly?
Check the denial letter. EviCore denials are issued on EviCore letterhead and reference EviCore's clinical criteria. Oscar-internal denials come from Oscar's UM team and cite Oscar's clinical guidelines or InterQual criteria. The letter will also specify where to direct appeals — if EviCore is named, the appeal goes to EviCore first.
What is the most effective first step after an EviCore denial for an Oscar plan?
Request a peer-to-peer review with an EviCore medical director before EviCore issues its final determination. The P2P call lets the treating physician explain clinical rationale directly, and is consistently more effective than a written reconsideration alone. Request via evicore.com as soon as you receive the pending adverse determination notice — the window closes when the final denial is issued.
Can I appeal an Oscar PA denial for a service that has already been rendered?
The pre-service PA appeal route closes once the service is rendered. If the service was rendered after a PA denial, the appeal shifts to a post-service medical necessity dispute — submitted through the Oscar provider portal using the Claims Disputes Provider Form (required since October 1, 2025), with a 180-day filing window from EOP receipt. For detailed guidance on Oscar post-service disputes, see our Oscar Health appeal guide.
What happened to EviCore's role in Cigna+Oscar plans in 2026?
Effective January 1, 2026, EviCore ended its prior authorization management role for Cigna+Oscar product lines. The PA submission pathway for Cigna+Oscar patients changed as a result. Contact Cigna+Oscar provider relations at 1-855-672-2789 to confirm the current PA routing for Cigna+Oscar-covered patients before submitting any PA request.
Does Oscar Health Medicare Advantage have different PA appeal rules?
Yes. Oscar MA plans follow CMS Medicare Advantage utilization management requirements under 42 CFR §§ 422.566–422.576, including different appeal timelines (72 hours expedited, 30 days standard) and a mandatory escalation pathway through the Medicare Appeals Council rather than a state-licensed IRO. PA requirements and appeal rights differ substantially from ACA commercial plans. For MA-specific context, see our prior authorization denial complete guide.
What if Oscar misses the required PA decision deadline?
Document your submission date and calculate Oscar's required decision window. If Oscar (or EviCore) does not respond within the standard or expedited deadline, the non-response may constitute a deemed denial under ACA regulations — which itself triggers the right to internal appeal or external independent review. File a complaint with your state insurance department and escalate to external review without waiting further for a response that is already overdue.
Ready to Appeal Oscar PA Denials More Efficiently?
Oscar's EviCore delegation model adds a routing step that catches most billing teams off guard. Missing the P2P request window, routing a denial to Oscar when it belongs with EviCore, or submitting a reconsideration without addressing the specific cited criteria are the three most common reasons otherwise recoverable PA denials stay denied.
Get Started:
- Identify whether your Oscar PA denial came from Oscar internal UM or EviCore
- Route the appeal to the correct reviewer — Oscar portal or EviCore portal
- Request the EviCore peer-to-peer call before the determination window closes
- Track standard and expedited appeal deadlines without manual calendar management
This guide reflects Oscar Health's 2026 prior authorization procedures based on Oscar's published PA turnaround times, the April 2026 Individual Prior Authorization List, and ACA regulatory requirements under 45 CFR § 147.136 and 42 CFR §§ 422.566–422.576. State requirements, Cigna+Oscar plan details, and Oscar Medicare Advantage rules vary. Verify current PA requirements and deadlines with Oscar provider relations before submitting. This is not legal advice.