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Prior authorization

Submitting a prior authorization request

Submitting a prior authorization request is the step in which a provider transmits a completed request — the proposed service, the supporting clinical documentation, and the required identifiers — to the payer through its designated channel so the payer can review it before the service is furnished. It follows gathering the clinical documentation and precedes tracking the request to a decision. How a request is submitted — the form, the channel, and the required contents — is set by each payer and plan and changes over time, so the current payer source is the authority on the specifics.

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Key takeaways

What submitting means in the authorization workflow

A prior authorization is a payer's advance determination that a proposed service meets its coverage and medical necessity criteria. Submitting the request is the discrete act of transmitting that request to the payer — it sits inside the larger prior authorization workflow between assembling documentation and following the request to a decision. A well-prepared submission does not by itself guarantee approval, but a poorly routed or incomplete one reliably produces delay, a request for more information, or an administrative denial.

A note on terminology

Confirming the request is ready before submission

Submission is only as good as the work in front of it. Before a request is transmitted, several conditions should already be confirmed so the payer receives a request it can act on rather than one it must pend for missing information.

  1. Confirm active coverage

    Complete eligibility verification for the plan expected to be in effect on the anticipated date of service, and identify any secondary plan through coordination of benefits so the request is sent to the correct payer.
  2. Confirm the service requires authorization

    Check the payer's current list of services that require prior authorization. That list is payer- and plan-specific and is revised over time, so a service authorized under one plan may not need review under another.
  3. Assemble the clinical documentation

    Gather the notes, results, and orders that establish medical necessity, as described in gathering clinical documentation. For some drugs and services the payer may also require evidence that step therapy was tried or is clinically inappropriate.
  4. Pin down the coded service and units

    Identify the specific procedure or service codes, and the number of units, visits, or the date span being requested, using the standard code sets maintained by their respective owners. The request should describe exactly what will later be billed.
  5. Identify the ordering and servicing providers

    Record the correct provider identifiers, including each NPI, so the authorization is tied to the entity that will render and bill the service.

Choosing the submission channel

Payers designate how they will accept a request, and submitting through the wrong channel is a common cause of avoidable delay. Most payers publish one or more accepted methods, and the choice among them is constrained by what the payer supports for a given plan and service.

Common prior authorization submission channels
Common prior authorization submission channels
ChannelWhat it isTypical trade-off
Payer portalWeb-based submission on the payer's or a vendor's site.Structured intake and often an immediate reference number; requires an account and manual data entry.
Electronic transaction (278)The standardized X12 278 request and response exchanged system to system.Supports automation and is central to electronic prior authorization; depends on payer and practice-system support.
FaxTransmitting a request form and attachments by fax.Historically widely accepted; harder to track and to confirm receipt.
PhoneTelephonic intake, frequently used for urgent or expedited requests.Useful for verbal or time-sensitive review; usually still requires written follow-up.

Adoption of electronic methods is expanding under federal rulemaking; see electronic prior authorization and the CMS Interoperability and Prior Authorization rule. Available channels vary by payer and change over time.

What a complete submission includes

Whatever the channel, a request the payer can adjudicate contains a consistent core of information. Missing or inconsistent elements are the most frequent reason a request is pended for additional information.

  • Patient and subscriber identification — name, date of birth, and member or subscriber ID as shown on the current card.
  • Payer and plan — the specific plan and, where relevant, the line of business handling the request.
  • Provider identifiers — the ordering and the servicing or rendering providers, with NPIs and any payer-assigned identifiers.
  • The requested service — the specific coded procedure or item, the units or visit count, and the requested date or date span.
  • Place and setting of service, where the payer requires it.
  • Clinical documentation — the records that support medical necessity, plus any payer-required form or criteria worksheet.
  • A requesting contact — a name and callback number for the payer's reviewer to reach.

The request should match the future claim

After submitting: confirmation and next steps

Submission is not complete when the request leaves the practice; it is complete when receipt is confirmed and the request is recorded for follow-up.

  1. Capture proof of submission

    Save the portal confirmation, fax transmission report, or call reference so the date and time of submission are documented.
  2. Record the reference or authorization number

    Log the case or reference number the payer assigns at intake. If the request is approved, record the resulting authorization number together with its valid date range and any unit limit. A reference number issued at submission is not the same as an approval.
  3. Track the request to a decision

    Monitor the request through status tracking, responding promptly to any request for additional information, since the review clock and any expedited timeframe are set by the payer and, for some plans, by regulation.
  4. Mind downstream deadlines

    An authorization does not remove the claim's timely filing deadline; the service still must be billed within the payer's window after it is rendered.

Standardize the intake record

Common submission problems and how they are avoided

Most submission failures trace to a handful of recurring causes, nearly all of which are preventable at intake.

  • Routing to the wrong channel or using a superseded form, so the request is never logged by the payer.
  • Sending to the wrong payer after a plan change or a missed secondary payer, which correct coordination of benefits would have caught.
  • Mismatched or missing provider identifiers, so the payer cannot tie the request to the rendering entity.
  • Documentation that does not establish medical necessity, which leads to a denial or a request for more information.
  • For medications and some services, missing evidence that step therapy requirements were met or are clinically inappropriate.
  • Submitting for a service that did not require authorization, or missing one that did — both waste time and risk downstream denials.
  • A coverage lapse on the date of service that eligibility verification would have identified before submission.

Common questions

Is submitting a prior authorization request the same as getting approval?

No. Submission transmits the request to the payer; approval is the payer's decision after it reviews the request. A reference or case number issued at intake confirms that the payer received the request, not that it authorized the service.

Which submission channel should a practice use?

Whichever channel the payer designates for that plan and service. Many payers accept a portal, an electronic 278 transaction, fax, or phone, but the accepted methods vary by payer and change over time, so the payer's current instructions are authoritative.

Does an approved authorization guarantee payment?

No. Authorization addresses medical necessity and coverage rules in advance, but payment still depends on eligibility on the date of service, correct claim submission, timely filing, and other adjudication rules. Payers state this limitation explicitly.

How quickly does a payer respond to a request?

Turnaround varies by payer, plan, service, and whether the request is standard or expedited, and some timeframes are set by regulation. There is no single universal deadline, so the payer's current requirements should be checked.

What happens if the billed service differs from what was authorized?

A mismatch between authorized and billed codes, units, or providers commonly causes an authorization-related denial. Reconciling authorized units to the billed service before the claim goes out helps prevent it.

Authoritative sources

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