
NPI Number in Medical Billing: Definition and Enrollment
The NPI is a 10-digit unique identifier required on all medical claims. Learn about Type 1 vs. Type 2 NPIs, how to enroll, and NPI requirements in billing.
NPI Number at a Glance
The National Provider Identifier (NPI) is the 10-digit unique identifier assigned to healthcare providers for use in all HIPAA transactions, required on every claim submission.
- Obtaining and maintaining an accurate NPI is part of the provider credentialing and payer enrollment process.
- Return to the full medical billing glossary for related terms.
NPI-NUMBER in Detail
What does NPI-NUMBER cover in detail?
The National Provider Identifier (NPI) is the 10-digit unique identifier assigned to healthcare providers for use in all HIPAA transactions, required on every claim submission.
Obtaining and maintaining an accurate NPI is part of the provider credentialing and payer enrollment process. Return to the full medical billing glossary for related terms.

Using NPI-NUMBER Correctly
How do I use NPI-NUMBER correctly?
Definition in Practice
The NPI is a 10-digit unique identifier required on all medical claims. Learn about Type 1 vs. Type 2 NPIs, how to enroll, and NPI requirements in billing.
Billing Impact
This concept directly affects how claims are prepared, submitted, and adjudicated. Errors related to this term are a common source of denials.
Documentation Relevance
Clinical documentation accuracy related to this concept determines whether claims are paid, reduced, or denied on the first submission.
Related Concepts
Understanding this term builds a foundation for understanding the broader revenue cycle. Review related terms and processes to build comprehensive knowledge.
Related Billing Resources
NPI-NUMBER, Frequently Asked Questions
The National Provider Identifier (NPI) is the 10-digit unique identifier assigned to healthcare providers for use in all HIPAA transactions, required on every claim submission.
Obtaining and maintaining an accurate NPI is part of the provider credentialing and payer enrollment process. Return to the full medical billing glossary for related terms.
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