How to Get Your NPI Number: Step-by-Step Guide

What Is an NPI Number?

A National Provider Identifier (NPI) is a unique 10-digit identification number assigned to healthcare providers in the United States. Mandated by the Health Insurance Portability and Accountability Act (HIPAA), the NPI is used to identify providers in standard healthcare transactions including claims submission, eligibility verification, referral authorizations, and electronic prescribing.

Every healthcare provider who transmits health information electronically must have an NPI. For mental health providers — psychologists, licensed clinical social workers, licensed professional counselors, licensed marriage and family therapists, and psychiatric nurse practitioners — the NPI is the foundational identifier you need before you can credential with insurance companies, enroll in Medicare or Medicaid, or submit claims of any kind.

Your NPI number is assigned for life. It does not change when you move, change your name, switch practice settings, or get a new license. It is your permanent identifier within the healthcare system.

Verify with your payer: While the NPI is a universal identifier, some payers have additional provider ID requirements. Confirm with each insurance company whether they need any identifiers beyond your NPI when you submit applications.

When You Need It

You need an NPI number before you can:

• Apply for insurance credentialing — Every payer application requires your NPI
• Enroll in Medicare or Medicaid — CMS requires an NPI for PECOS enrollment
• Set up a CAQH ProView profile — Your NPI is required during CAQH registration
• Submit insurance claims — The NPI is a required field on every CMS-1500 claim form
• Provide superbills — Clients need your NPI on superbills for out-of-network reimbursement
• Prescribe medications — If you have prescriptive authority, your NPI is linked to your prescribing profile
• Comply with HIPAA requirements — NPI use is mandated for all HIPAA-covered electronic transactions

Type 1 vs. Type 2 NPI

The NPPES system issues two types of NPI numbers, and understanding the difference is important for structuring your practice correctly.

Type 1 NPI — Individual Provider

A Type 1 NPI is assigned to individual healthcare providers — sole proprietors, employees, or independent contractors who deliver clinical services. As a therapist, you need a Type 1 NPI regardless of your practice setting.

You need a Type 1 NPI if you are:

• A solo practitioner
• An employee of a group practice, hospital, or agency
• An independent contractor
• Any individual provider delivering healthcare services

Type 2 NPI — Organization

A Type 2 NPI is assigned to organizations — group practices, clinics, hospitals, home health agencies, and other healthcare entities. A Type 2 NPI identifies the organization itself, not any individual provider within it.

You need a Type 2 NPI if:

• You own a group practice that is a separate legal entity (LLC, PLLC, S-Corp, or corporation)
• Your practice employs or contracts with multiple providers
• Insurance companies require billing under an organizational NPI

Important: If you are a sole proprietor operating under your own name and SSN, you typically do not need a Type 2 NPI. If you have formed a business entity with an EIN, check with your payers about whether they require billing under a Type 2 organizational NPI.

How to Apply for Your NPI: Step-by-Step

Step 1: Gather Required Information

Before starting the application, collect the following:

• Full legal name — As it appears on your professional license
• Social Security Number — Required for identity verification
• Date of birth
• State license information — License number, state, and type (e.g., LCSW, PhD, LPC)
• Taxonomy code — The Healthcare Provider Taxonomy code that describes your specialty. Common codes for mental health providers include:
  • 1041C0700X — Clinical Psychologist
  • 104100000X — Psychologist (general)
  • 1041S0200X — School Psychologist
  • 101YM0800X — Mental Health Counselor
  • 101YA0400X — Addiction Counselor
  • 104100000X — Social Worker (clinical)
  • 106H00000X — Marriage and Family Therapist
• Practice address — The physical location where you provide services
• Mailing address — Where you receive correspondence (can be the same as practice address)
• Contact information — Phone number and email address

Step 2: Access NPPES Online

Navigate to the NPPES website at nppes.cms.hhs.gov. Click on the link to create a new account or apply for an NPI. You will first need to create an Identity & Access Management (I&A) account through CMS if you do not already have one.

Step 3: Create Your I&A Account

The CMS Identity & Access Management system verifies your identity before granting access to NPPES. During registration:

1. Enter your personal information (name, SSN, date of birth, email)
2. Create a user ID and password
3. Select and answer security questions
4. Verify your email address through the confirmation link sent to you
5. Wait for your I&A credentials to be processed (usually within 24 hours)

Step 4: Complete the NPI Application

Log in to NPPES with your I&A credentials and complete the application:

1. Select Entity Type — Choose Type 1 for individual provider
2. Enter personal information — Legal name, date of birth, gender, SSN
3. Enter provider taxonomy — Select the code that best describes your specialty
4. Enter license information — Your state license number and state
5. Enter practice location — Physical address where you see clients
6. Enter mailing address — Where you receive mail
7. Designate an authorized official — For Type 1, this is you
8. Review and submit — Carefully review all information before submitting

Step 5: Receive Your NPI

After submitting your application, you will receive your NPI number via email. Online applications are typically processed within 1 to 10 business days. Your NPI will also appear in the NPI Registry at npiregistry.cms.hhs.gov once it is active.

Save your NPI number in a secure location. You will use it on every insurance application, claim form, and superbill for the duration of your career.

How to Update Your NPI Information

Your NPI information must be kept current. You are required to report changes within 30 days. Common updates include:

• Change of practice address — When you move to a new office location
• Change of name — After a legal name change
• Adding or changing a taxonomy code — If your license type or specialty changes
• Adding a practice location — If you open a second office or begin telehealth
• Deactivating your NPI — If you retire or permanently stop practicing

To update your information:

1. Log in to NPPES at nppes.cms.hhs.gov
2. Select "Update my NPI" from the dashboard
3. Make the necessary changes
4. Review and submit

Changes are typically processed within a few business days. After updating NPPES, also update your CAQH ProView profile and notify each insurance company you are credentialed with.

Common Mistakes to Avoid

Using the Wrong Taxonomy Code

Your taxonomy code tells payers what type of provider you are. Using the wrong code can lead to claim denials, credentialing delays, and incorrect directory listings. Verify your taxonomy code matches your license type and the services you provide. You can search taxonomy codes at the NUCC Health Care Provider Taxonomy site.

Not Updating After a Move

Failing to update your practice address in NPPES within 30 days of a move is a HIPAA violation and can cause claim denials. Insurance companies cross-reference NPPES data with their records, and a mismatch between your NPI address and your claims can trigger reviews or rejections.

Applying for Type 2 When You Need Type 1

Solo practitioners sometimes apply for a Type 2 (organizational) NPI when they only need a Type 1 (individual) NPI. If you are unsure which type you need, the general rule is: if you are an individual delivering services, you need Type 1. If you have a business entity that employs or contracts with providers, the entity needs Type 2.

Sharing or Misusing an NPI

Your NPI is uniquely yours. Never allow another provider to use your NPI to bill for services they provided. This constitutes fraud. Each provider who delivers services must bill under their own NPI.

Delaying the Application

Because credentialing timelines are already long (3 to 6 months), delaying your NPI application adds unnecessary time to the process. Apply for your NPI as soon as you have your state license. The application is free and there is no reason to wait.

Frequently Referenced NPI Information

Item	Detail
Application URL	nppes.cms.hhs.gov
Cost	Free
Processing time (online)	1-10 business days
Processing time (paper)	20+ business days
NPI format	10-digit number
Lifetime validity	Permanent — does not expire
Update deadline	Within 30 days of any change
Registry search	npiregistry.cms.hhs.gov