INSURHI RESEARCH BRIEF — 2026 DENIAL PATTERNS & DOCUMENTATION GAPS
Published: 2026-08-27
URL: https://www.insurhi.com/research/denial-patterns-2026

ABOUT THIS BRIEF
Insurhi is an independent insurance data and claims research organization. This brief summarizes
common denial reasons and documentation gaps across six coverage lines, drawn from our anonymized
case library and public playbooks—not carrier marketing materials.

CITATION (APA)
Insurhi. (2026). 2026 Common Denial Reasons & Documentation Gaps.
https://www.insurhi.com/research/denial-patterns-2026

AUTO — Late notice, liability disputes, incomplete evidence
Denial patterns: late notice; UM/UIM comparative negligence; total-loss valuation gaps; supplement denials.
Documentation gaps: photos without timestamps; missing police reports; incomplete estimates; no written follow-up.
Cases: /claims/cases/1, /claims/cases/7, /claims/cases/10, /claims/cases/11

HOME — Gradual damage, depreciation holdbacks, mitigation disputes
Denial patterns: gradual vs. sudden water; depreciation withheld; mold sub-limits; ordinance-and-law denials.
Documentation gaps: no cause-and-origin report; missing moisture logs; incomplete lien waivers; scope mismatches.
Cases: /claims/cases/2, /claims/cases/8, /claims/cases/13, /claims/cases/14

LIFE — Contestability and beneficiary documentation
Denial patterns: contestability pharmacy mismatches; misrepresentation allegations; beneficiary disputes.
Documentation gaps: records not chronological; medication list gaps; missing death certificates.
Cases: /claims/cases/3, /claims/cases/9, /claims/cases/16, /claims/cases/17

MEDICARE — Billing errors, prior auth, network disputes
Denial patterns: duplicate CPT lines; prior auth denials; SNF coinsurance crossover errors; OON surprise bills.
Documentation gaps: missing itemized bills; no provider appeal; missing physician orders.
Cases: /claims/cases/4, /claims/cases/18, /claims/cases/19, /claims/cases/20

PET — Pre-existing, waiting periods, mixed invoices
Denial patterns: pre-existing from wellness notes; waiting-period denials; bilateral exclusions; wellness line denials.
Documentation gaps: incomplete vet records; no acute vs. chronic letter; mixed invoice codes.
Cases: /claims/cases/5, /claims/cases/21, /claims/cases/22, /claims/cases/23

RENTERS — Theft proof, mold caps, sub-limits
Denial patterns: insufficient theft proof; mold caps; roommate exclusions; loss-of-use disputes.
Documentation gaps: late police reports; missing serial backups; no landlord correspondence.
Cases: /claims/cases/6, /claims/cases/24, /claims/cases/25

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