Reimbursement, Reimbursement Specialist; Claim Denial & Appeal Focus)(Remote

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Castle Biosciences Inc. is growing, and we are looking to hire a Reimbursement Specialist (Claim Denial & Appeal Focus) working remotely from your home office based in the USA, with a start date on or before January 15, 2026.

• Salary Range: $46,000.00 - $47,277.00. Final salary is based on Experience and Education levels.
• Excellent Annual Salary + 20% Bonus Potential
• 20 Accrued PTO Days Annually
• 10 Paid Holidays
• 401K with 100% Company Match up to 6%
• 3 Health Care Plan Options + Company HSA Contribution
• Company Stock Grant Upon Hire
• $75/month reimbursement for internet service

This individual is responsible for resolving denied insurance claims for laboratory services by providing payers with requested documentation, initiating the appeal process on behalf of the patient, following up on outstanding transactions, and delivering the highest level of customer service to internal and external customers. This role spends most of its time reviewing and resolving front-end claim issues to ensure timely, accurate submission;

reviewing Explanation of Benefits (EOBs), electronic remittance advice, and denial letters; assigning ANSI codes; and taking appropriate action in the billing system. Responsibilities include contacting insurance companies for missing information or claim status, using payer portals for follow-up, and supplying additional documentation needed to adjudicate claims. The role also involves creating custom appeals with appropriate arguments to overturn denials based on payer medical policy or state laws and submitting both standard and custom appeal letters for insurance companies including Medicare, Medicare Advantage, and commercial plans.

• High School Diploma or equivalent GED or equivalent work experience.
• Two years of health insurance billing with experience in identifying and resolving claim issues for laboratory tests.
• Must have a working knowledge of various payers' designations of authorized representative forms.
• Experience handling a high volume of claims work on a daily basis (35 plus claims per day).
• Must demonstrate the ability to type 35 WPM with 90% or higher accuracy.