Your NPI (National Provider Identifier) is a 10-digit number that identifies you as a healthcare provider. It specifies your specialty (clinical social worker, marriage family therapist, etc), practice address, and other information.
All Individuals and Organizations who meet the definition of health care provider as described at 45 CFR 160.103 are eligible to obtain a National Provider Identifier, or NPI. If you are a HIPAA covered provider or if you are a health care provider/supplier who bills Medicare for your services, you need an NPI.The Who, What, When, Why & How of NPI: Information for Healthcare Providers
This number follows you everywhere in the healthcare provider world. It’s like your SSN except, it’s not private! Some portions of the information that the National Plan & Provider Enumeration System collects are kept private, but that which is relevant to the public is published. Go ahead and look up a provider you know – NPPES NPI Registry.