What Is CARC 197?
CARC 197 — officially defined as "Precertification/authorization/notification/pre-treatment absent" — is one of the most common and costly denial codes in medical billing. When a payer issues this code, they are saying that the required prior authorization, precertification, or advance notification was not obtained before the service was rendered.
This denial can occur for several reasons: the authorization was never requested, it was requested but not approved in time, the approved authorization expired before the date of service, or the authorization was obtained for a different CPT code than the one billed.
Why This Denial Code Matters: The Scale of the Problem
Prior authorization denials represent a massive financial and administrative burden on healthcare practices. The numbers paint a stark picture:
- Initial claim denial rates hit 11.8% in 2024, an increase of 2.4% year over year, with prior authorization denials among the leading causes.
- Practices complete an average of 39 prior authorization requests per physician per week, consuming 13 hours of staff time (2024 AMA Survey).
- 40% of physicians employ staff members solely to manage prior authorization, adding significant overhead to practice operations.
- 75% of physicians report that prior authorization denials have increased over the past five years.
- 95% of physicians say prior authorization significantly contributes to physician burnout.
Perhaps most alarming: nearly one in four physicians (24%) reported that prior authorization has led to a serious adverse event for a patient, including hospitalization, permanent impairment, or death.
The Appeal Success Rate Paradox
Here is the most important statistic your billing team needs to know:
This is the prior authorization paradox: appeals succeed at an extraordinarily high rate, yet the vast majority of denials go unchallenged. The primary reason? In the 2024 AMA survey, 62% of physicians said they do not believe the appeal will be successful — a belief that is directly contradicted by the data.
For medical billing teams, this represents an enormous revenue recovery opportunity. Practices with structured, data-driven appeal workflows report success rates between 60% and 67%, with some achieving even higher when proper documentation strategies are applied.
Step-by-Step Appeal Strategy for CARC 197
Check the Explanation of Benefits (EOB) for specific RARC codes paired with the CARC 197. Determine which service lines were denied, confirm whether the payer allows reprocessing or requires a formal appeal, and verify the appeal deadline — typically 120 days from the denial date for Medicare and 60–180 days for commercial payers.
Before writing an appeal, verify your internal records. Check pre-certification logs, the payer's provider portal, EHR authorization tracking, and any faxed or electronic approval letters. In many cases, the authorization exists but was not attached to the claim correctly — a common and easily fixable issue.
Build your appeal packet with the strongest possible evidence. Include the authorization number and approval letter (if authorization exists), the payer's own policy manual showing whether the service actually requires PA, clinical notes demonstrating medical necessity, and any documentation of emergency or urgent circumstances that prevented prior authorization.
Your appeal letter should include: the claim number and patient identifier, the specific denial code (CARC 197) and RARC codes, a clear statement of why the denial is incorrect, reference to the payer's authorization policy, clinical justification for the service, and all supporting documentation as attachments. Submit via the payer's preferred channel — portal, fax, or certified mail.
Track appeal status weekly. If denied at the first level, request a peer-to-peer review with the payer's medical director. If the internal appeal is exhausted, file for external review — independent review organizations overturn approximately 27% of cases at this stage. Document every interaction for your audit trail.
Specialty-Specific Impact and Strategies
CARC 197 denials do not affect all medical specialties equally. Certain practice types face dramatically higher prior authorization burdens and denial rates.
Oncology: The Highest Burden
In a 2024 survey published in the National Institutes of Health, 54% of respondents identified hematology/oncology as the top specialty requiring prior authorization. Oncology drugs represented a median of 33% of all prior authorization spending. Cancer treatments involve expensive biologics, immunotherapies, and advanced diagnostics that insurers scrutinize intensely.
Strategy: Oncology practices should implement dedicated PA coordinators, maintain treatment protocol libraries that align with NCCN guidelines, and request peer-to-peer reviews from oncology-trained medical directors when denials are issued.
Mental Health: Short Approval Windows
Mental health services face unique prior authorization challenges. Intensive services such as inpatient psychiatric care, residential treatment, partial hospitalization programs (PHP), and intensive outpatient programs (IOP) are frequently approved in very short windows — sometimes as brief as two weeks — compared to longer approval periods for other medical specialties. This creates a perpetual cycle of re-authorization that increases administrative burden and denial risk.
Strategy: Mental health practices should track authorization expiration dates proactively, submit re-authorization requests at least 7 business days before expiration, and document functional impairment and treatment progress at every session to support ongoing medical necessity.
Physical Therapy: Frequent Re-Authorization
Physical therapists are typically saddled with more prior authorization requirements than the average clinician. Payers frequently limit the number of approved visits and require re-authorization for extended treatment plans — a process that creates friction and delay when patients need consistent, ongoing care.
Strategy: PT practices should document measurable functional outcomes at each visit, request the maximum number of visits allowed per authorization period, and submit re-authorization requests with objective progress data (range of motion measurements, functional capacity evaluations, validated outcome scores).
Cardiology and Radiology: High-Cost Imaging
Cardiology and radiology practices face significant prior authorization burdens for advanced imaging procedures — MRI, CT scans, PET scans, and cardiac catheterization. Payers increasingly use radiology benefit management (RBM) companies as gatekeepers, adding an additional layer of approval requirements.
Strategy: Know which imaging procedures require authorization through each payer and each RBM. Maintain a payer-specific authorization matrix and verify requirements at the time of scheduling — not at the time of service.
2026 Regulatory Changes That Affect CARC 197 Appeals
Several significant regulatory changes are reshaping the prior authorization landscape in 2026.
CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F)
Released in January 2024, this landmark rule introduces mandatory requirements for Medicare Advantage, Medicaid managed care, CHIP, and Federally Facilitated Exchange plans beginning in 2026:
- Expedited authorizations: Payers must respond within 72 hours (down from previous, often undefined timeframes).
- Standard authorizations: Payers must respond within 7 calendar days (down from 14 days for Medicare Advantage).
- Specific denial reasons: Must be provided electronically using standardized reason codes.
- Public reporting: Starting March 2026, payers must publicly report prior authorization approval rates, denial rates, and processing times.
The public reporting requirement is a game-changer. For the first time, you will be able to compare payer-specific prior authorization denial rates and processing times. This data can inform your appeal strategy, support regulatory complaints, and help practices make informed payer contracting decisions.
Gold Carding: PA Exemptions for High-Performing Providers
CMS now supports a "gold card" model that exempts high-performing providers from prior authorization requirements. Providers with at least a 90% approval rate in the prior year qualify for a one-year exemption from PA requirements for items and services (not medicines).
At the state level, gold carding is gaining rapid momentum. At least 18 states have taken legislative action on prior authorization reform since January 2025. Texas extended its gold card look-back period from 6 months to one year. Arkansas now extends gold card privileges to a provider's entire group practice.
Retroactive Denial Protections (2026)
Beginning in 2026, Medicare Advantage plans are prohibited from retroactively denying approved services unless there is evidence of fraud. This is a critical protection: once a service is authorized and rendered, the payer cannot reverse the authorization after the fact (except for documented fraud or valid "good cause" under CMS standards). All coverage decisions made during or after an inpatient stay must be treated as formal determinations, granting enrollees full appeal rights.
Prevention: How to Avoid CARC 197 Denials
The most cost-effective strategy is preventing CARC 197 denials before they occur. Here are the evidence-based prevention practices:
Build a Pre-Authorization Matrix
Create a detailed, payer-specific reference that lists every service requiring prior authorization, the associated CPT codes, required documentation, and submission deadlines. Update this matrix quarterly as payer policies change. Subscribe to payer bulletins and CMS updates to stay current.
Verify at Three Checkpoints
- At scheduling: Check whether the appointment requires PA and initiate the request immediately.
- At patient intake: Confirm that authorization is on file and valid for the date of service.
- Before service delivery: Reconfirm authorization status, verify it matches the CPT code being performed, and confirm it has not expired.
Automate Authorization Tracking
Implement automated tools that flag CPT codes requiring authorization during scheduling, set alerts for expiring authorizations, and integrate with payer portals for real-time status verification. One Alabama hospital system increased its authorization lead time from 1–2 days to 7 days before the service date by implementing automated tracking — resulting in significantly fewer same-day authorization issues and avoidable denials.
Increase Authorization Lead Time
Do not wait until the day before a scheduled service to request authorization. Best practice is to submit PA requests at least 7 business days before the service date, allowing time for payer review, information requests, and peer-to-peer review if needed.
Real-World Impact: Case Study Data
A study published in the National Institutes of Health examined an academic medical center's surgery department where over $21 million in charges were denied in a single year, with $291,217.63 ultimately written off as uncollectible. The root causes were entirely preventable: CPT codes not matching authorized procedures, registration errors, and payer regulation constraints. All required process changes could be contained within the department.
The takeaway for billing teams: CARC 197 denials are almost always process failures, not coverage limitations. The right systems, training, and accountability structures can eliminate the vast majority of these denials before they ever reach the payer.
Key Takeaways
- Always appeal CARC 197 denials. The data is unambiguous: over 80% of prior authorization appeals succeed when filed.
- Check for existing authorization first. Many CARC 197 denials result from authorization that exists but was not properly attached to the claim.
- Invest in prevention. A payer-specific PA matrix, three-checkpoint verification, and automated tracking tools can prevent the majority of these denials.
- Know your specialty's vulnerabilities. Oncology, mental health, PT, and cardiology face the highest PA burden — build specialty-specific workflows.
- Leverage 2026 regulations. New CMS rules mandate faster response times, public reporting, gold carding, and retroactive denial protections. Use these to your advantage.
Sources
- American Medical Association. "2024 AMA Prior Authorization Physician Survey." ama-assn.org
- Kaiser Family Foundation. "Medicare Advantage Insurers Made Nearly 53 Million Prior Authorization Determinations in 2024." kff.org
- Centers for Medicare & Medicaid Services. "CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F)." cms.gov
- National Institutes of Health. "Perceptions of Prior Authorization Burden and Solutions." PMC, 2024.
- Experian Health. "State of Claims Report 2025." experian.com
- American Medical Association. "Over 80% of Prior Auth Appeals Succeed — Why Aren't There More?" ama-assn.org
- MultiState. "Prior Authorization Reform Gains Momentum in States." multistate.us, 2025.
- American Physical Therapy Association. "CMS Releases Final 2026 Medicare Advantage Rule." apta.org