Highmark Prior Authorization Requirements by Procedure Category

What Highmark requires for prior authorization depends on the category of the procedure, the member’s plan, how the request is sent, and the effective date. Avoiding authorization-related denials therefore starts with classifying the service correctly and routing it to the right review process. A procedure code alone does not settle the requirement, particularly when inpatient care, a separately authorized medication, or a regional portal rule applies.

Why Highmark prior authorization denials are a category and routing problem, not simply a medical necessity problem

The practice can absorb the full denied charge when required authorization is missing. Highmark’s provider manual prohibits billing the member unless the provider disclosed the missing authorization and estimated cost before service, and the member agreed in writing to assume financial responsibility.

Missing or incorrect authorization creates an administrative problem distinct from a judgment that care was clinically inappropriate. The manual separates authorization, which determines medical necessity, from payment, which also depends on coverage and eligibility. Authorization does not guarantee payment. Because requirements vary by contract and product line, the operational first step is to verify member eligibility and covered benefits before submission.

How Highmark organizes its authorization universe: the category structure that determines where every request goes

Highmark’s provider manual establishes a map of inpatient admissions, listed outpatient procedures, advanced imaging and cardiology, behavioral health, durable medical equipment and supplies, medical injectable drugs, and pharmacy medications. These are not interchangeable routes into one queue. Separate programs decide where some requests are reviewed, and the requirements for each member decide whether review is needed at all. The Federal Employee Program (FEP) has its own list for Standard Option, Basic Option, and Blue Focus members. The rules for commercial plans do not automatically apply to those plans.

Oncology and supportive therapy have their own review track, and Highmark Health Options West Virginia (HHO WV) sends certain surgical, pain management, and imaging services for review outside its main authorization pathway. Each branch has rules for its codes and dates when those rules take effect. This makes classification a navigation task rather than a search for a code on a single master list.

Inpatient admissions: what always requires authorization and what the elective-surgery rule adds

Highmark’s provider manual requires authorization for most inpatient hospital admissions, including acute care, long-term acute care (LTAC), inpatient rehabilitation, and skilled nursing facility admissions. Inpatient mental health and substance abuse treatment also fall within this category. The scope is broader than a surgical code search. Facility setting and planned level of care can establish an authorization obligation independently of whether a procedure appears on the coding list.

Highmark’s obtaining authorizations page makes that distinction explicit for elective surgery. If the surgery requires an inpatient level of care, prior authorization is required even when the procedure code is not listed. An unlisted elective procedure is therefore not automatically exempt. The HHO WV code lookup requires authorization for all inpatient admissions, including organ transplants, and all elective inpatient surgeries. For Medicaid members, home health care and hospice services also always need authorization, even when they are not on the procedure code list.

Outpatient advanced imaging and cardiology: a dedicated program with its own code set and portal pathway

Highmark’s advanced imaging and cardiology services prior authorization reference guide places non-emergent, elective outpatient advanced imaging and select cardiology services in a dedicated program. Treating these services as ordinary outpatient requests risks misrouting. The imaging modalities include MRI and MRA, PET and PET-CT, CT and CTA, and nuclear medicine. The cardiology services include myocardial perfusion imaging, stress echocardiography, transthoracic and transesophageal echocardiography, diagnostic heart catheterization, and nuclear cardiac imaging.

Emergency room imaging, inpatient imaging, and imaging during an observation stay are excluded from its authorization requirement. For HHO WV members, HealthHelp replaces GuidingCare as the routing destination for outpatient diagnostic CT scans, PET scans, and MRIs. Both the service and the member plan determine the destination.

The program’s code set changes on different dates. Effective November 1, 2026, code 70471 is added to the authorization list for all lines of business. It covers CT angiography of the head and neck with contrast material, including noncontrast images when performed and image postprocessing.

Behavioral health: the 2026 expansion that added new service types to the prior authorization list

Highmark’s provider communications added 19 codes to the behavioral health services that need authorization, effective March 1, 2026. The services include Applied Behavioral Analysis (ABA) for Autism, Intensive Outpatient Programming (IOP), Partial Hospitalization Programming (PHP), and Transcranial Magnetic Stimulation (TMS). A practice using a workflow established before March 2026 may be submitting claims for these services without recognizing that pre-service authorization is now required.

Mental health and substance abuse admissions already needed authorization under the inpatient category, and the March change brought outpatient and intensive outpatient behavioral health services into review. That distinction is important for practices whose authorization processes previously centered on admissions. Their existing inpatient controls do not, by themselves, address the newly included services.

DME, medical injectable drugs, and specialty medications: three sub-categories with separate submission tracks

Highmark’s provider manual says that some durable medical equipment (DME) and supplies need authorization before they are provided. The HHO WV code lookup also requires authorization for all covered services with no fee attached and all unlisted or unspecified procedure codes for WV Medicaid and CHIP members. These rules extend beyond named equipment codes. Medications needed for a procedure may require their own authorization, separate from or in addition to authorization for the procedure itself.

Medical injectable requirements also change independently of procedural requirements. Highmark’s prior authorization changes announcement added J1551, injection, immune globulin Cutaquig 100 mg, effective February 1, 2026. For FEP members, review of some medications changed from post-service medical necessity review to pre-service review on that same date.

Highmark Wholecare’s prior authorization notice added medications that need authorization for Medicare Assured members, effective May 1, 2026. These include J3490 for Redemplo (plozasiran), J3590 for Exdensur (depemokimab-ulaa), J9999 for Rybrevant Faspro (amivantamab-hyaluronidase-lpu), and J8499 for Daybue Stix (trofinetide). The remaining medications use J3590. They are Voyxact (sibeprenlimab-szsi), Xtrenbo (denosumab-qbde), Itvisma (onasemnogene aeparvovec-brve), and Enoby (denosumab-qbde).

OncoHealth reviews oncology and supportive therapy requests submitted through NaviNet or directly through its provider portal. Pharmacy medications follow a different electronic route. Highmark’s obtaining authorizations page directs pharmacy authorization requests to CoverMyMeds, with fax forms available when electronic submission is not possible or preferred. A medical procedure request does not substitute for either of these separate tracks.

How submission pathways work across Highmark’s portals, EDI, and regional exceptions

HHO WV’s provider portal and prior authorizations page requires portal submission for Medicaid and CHIP authorization requests effective April 1, 2026, including requests managed by HealthHelp. Non-participating providers, HHO Duals (Medicare) members, and urgent emergency requests are exempt. For participating providers subject to the rule, fax is no longer accepted. A request returned for resubmission costs time and can expose the practice to deadline pressure.

NaviNet provides eligibility verification, claims inquiries, and access to authorization sub-portals. Participating providers use GuidingCare for services that need authorization from the Utilization Management Department. HealthHelp instead receives HHO WV requests for musculoskeletal procedures involving spine, knee, and hip surgeries, interventional pain management, trigger point injections, and outpatient diagnostic imaging. Wholecare identifies NaviNet as its most efficient authorization route and provides an autofill form for the May 2026 medication additions.

Highmark’s obtaining authorizations page also permits electronic requests through a clearinghouse or practice management system using its EDI pathways. Separate EDI portals serve Pennsylvania, Delaware, and West Virginia. New York is an explicit exception to HIPAA 278 support. Highmark’s EDI does not yet support those transactions for New York providers, so a practice that works in more than one state cannot count on one way to submit electronically for all its Highmark business. Fax forms remain a backup where permitted, subject to mandatory portal requirements.

Recent code-level changes that require workflow updates now

Highmark’s prior authorization changes announcement added eleven codes effective February 1, 2026, spanning intra-operative neuromonitoring, skin substitutes, histotripsy, and the medical injectable discussed above. Additions create a new pre-service obligation. Workflows also need to change when codes are removed, because seeking authorization for deleted codes adds work that is no longer needed. Neither direction can be managed reliably from an old coding list.

The announcement removed five osteopathic manipulative treatment codes effective September 22, 2025. Code 98925 covers one to two body regions, 98926 covers three to four, and 98927 covers five to six. Code 98928 covers seven to eight regions, and 98929 covers nine to ten. These removals applied on a specific effective date.

The February 1, 2026 removals included six breast CT codes. Unilateral services were 0633T without contrast, 0634T with contrast, and 0635T without contrast followed by contrast. The codes for bilateral services were 0636T, 0637T, and 0638T, with the same contrast categories in that order. The announcement also removed J0480, injection, basiliximab 20 mg / Simulect. Effective September 1, 2026, nine surgery codes are removed, comprising five vascular and four cardiac codes, including single-vessel percutaneous transluminal coronary angioplasty and stenting codes.

Highmark’s obtaining authorizations page specifies different notification methods for these changes. Highmark sends written notice when codes are added and posts online when codes are deleted. A practice may learn about new obligations while overlooking opportunities to retire unnecessary authorization work.

The retrospective review deadline and what it means for services already delivered without authorization

Highmark’s obtaining authorizations page supports retrospective review through the portal for services already provided without required authorization. Effective August 1, 2026, all retrospective reviews must be submitted within two years of the date of service. Practices need to find missing authorizations quickly because older services can become too old to qualify for review.

Retrospective authorization must still be established before the claim can be adjudicated favorably. It does not remove the separate coverage and eligibility conditions for payment. Nor does a denial create permission to transfer the charge to the member without the advance documentation described earlier. For a claim denied because required authorization was missing, the operational response is a retrospective review submission, a process separate from the standard denial appeal queue. The two processes address different problems.

Using Highmark’s code lookup tools and CMS public reporting requirements to build a monitoring practice

Highmark’s obtaining authorizations page hosts the List of Procedures/DME Requiring Authorization and the separate FEP list. HHO WV provides CPT searches through the main site search bar, while Wholecare’s lookup tool is available through NaviNet. The HHO WV lookup explicitly describes its list as general guidance rather than an exhaustive inventory, reinforcing the need to consider plan requirements beyond a code match.

Beginning March 31, 2026, impacted payers must publish aggregated prior-calendar-year authorization metrics on their public websites. The requirement covers Medicare Advantage organizations, state Medicaid and CHIP fee-for-service programs, Medicaid managed care plans, CHIP managed care entities, and Qualified Health Plan issuers on the Federally-Facilitated Exchanges. HHO WV publishes metrics for medical items and services, excluding drugs. The number of approvals, denials, and requests in each service category can help show where the risk of denials is greatest.

Maintain a monitoring practice. That means checking coding lists at every announced effective date, verifying member eligibility and coverage before each submission, and matching the portal to the category and plan. When staff have limited time or resources, billing experts who know each payer can help track changes across these pathways. The enduring discipline is keeping those decisions current, rather than relying on the authorization list from the last time someone checked it.