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Quest Diagnostics

Billing and coding

Electronic billing

Easily access and resolve lab order billing errors with Quanum® Lab Services Manager.
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Z-Codes

Explore the ABCs of DEX Z-Code™ identifiers
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Pay a hospital or physician bill
Medicare coverage guidelines
Medicaid limited coverage policies
Commercial coverage and coding guides

Pay a hospital or physician bill

Visit our billing site to pay your hospital or physician bill. Please have your lab code and invoice number ready.

Coverage guidelines

Excludes1 logic

To learn more about Excludes1 logic and how Excludes1 notes interact with Quanum, watch our video.

For additional details regarding Excludes1 rules and coding edits, click here.

Medicare coverage

We’re pleased to provide Medicare Coverage and Coding Reference Guides to help you more easily determine test coverage and find ICD-10 diagnosis codes to submit with your test order. By doing so, you can ensure your Medicare patients’ lab tests are performed without delay and prevent disruptions to your office.

Medicaid limited coverage policies

Quest’s Medicaid coverage and coding reference guides can help you understand coverage limitation—preventing potential disruptions to your practice.

Commercial coverage and coding

Quest’s Commercial Coverage and Coding Reference Guides can help you understand coverage limitations and which ICD-10 codes are most frequently ordered by physicians. Understanding these coverage limitations may help prevent administrative disruptions to your practice.

Z-Codes

Learn how to register your lab for Z-Codes.

CPT® Code changes for 2025

View CPT Code changes for 2025.

 

Contact us

Have a billing question? Contact customer service

Contact us

Billing & coding

Looking for patient billing?

If you are a patient, visit patient billing

Resources and insights from Quest

Technology & Innovation
White Paper
Delivering actionable data for health plans
Population Health
Article
The budget-neutral incentive model
Technology & Innovation
White Paper
Manage lab spend to lower costs for health plans and employers
Technology & Innovation
Case Study
Lab spend optimization through Shared Savings
See all

Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.