Reimbursement, Customer Service Specialist

Castle Biosciences•Phoenix, AZ

3d•Remote

About The Position

Castle Biosciences Inc. is growing, and we are looking to hire a full-time Reimbursement, Customer Service Specialist working from your home office based in the USA with a start date of February 9, 2026. This role is responsible for answering incoming calls and email inquiries from patients, clinicians, insurance plans, and area sales managers. The position provides support for insurance billing-related questions and educates callers on reimbursement processes, billing policies, and required documentation needed for appeals and medical record submissions. The majority of time in this role is spent managing inbound communications, ensuring timely, accurate responses, and delivering clear guidance to a wide range of internal and external stakeholders.

Requirements

Minimum of three years of customer service experience, preferably in a call center environment
Minimum of two years of health insurance billing with experience in identifying and resolving claim issues
Experience collaborating with patients, providers, and insurance plans throughout the billing cycle
Experience researching and utilizing payor websites
Certification in Medical Billing and/or Coding or equivalent experience
Must demonstrate the ability to type 35 WPM with 90% or higher accuracy.

Responsibilities

Answering incoming calls and email inquiries from patients, clinicians, insurance plans, and area sales managers.
Providing support for insurance billing-related questions
Educating callers on reimbursement processes, billing policies, and required documentation needed for appeals and medical record submissions.
Managing inbound communications
Ensuring timely, accurate responses
Delivering clear guidance to a wide range of internal and external stakeholders.