If you’re a physician, psychologist, therapist, nurse practitioner, physician assistant, chiropractor, dentist, or another healthcare professional, you may need an NPI before you can enroll with certain health plans or submit claims.
Healthcare organizations, such as hospitals, clinics, group practices, and corporations that meet the definition of a healthcare provider, may also need an NPI.
This guide explains what an NPI number means, who needs one, the different NPI types, how to apply, how long the process takes, how to update your information, and common mistakes to avoid.
What Is an NPI Number?
An NPI number, or National Provider Identifier, is a unique 10-digit identification number that healthcare providers use for administrative and financial transactions covered by HIPAA.
The Centers for Medicare & Medicaid Services (CMS) created the NPI system under the Health Insurance Portability and Accountability Act of 1996, commonly known as HIPAA.
The NPI system helps healthcare providers, health plans, and healthcare clearinghouses identify providers consistently during standard electronic healthcare transactions.
An NPI does not replace a provider’s medical license, tax identification number, or Medicare enrollment.
Instead, it serves as a standard provider identifier.
For example, a physician may have:
- An NPI number for provider identification.
- A state medical license for professional practice.
- A Social Security number or Employer Identification Number for tax purposes.
- A Medicare enrollment record for participation in Medicare.
- A Medicaid provider number for participation in a state Medicaid program.
These identifiers serve different purposes.
| What Does NPI Stand For? NPI stands for National Provider Identifier. The NPI provides a standard way to identify healthcare providers in HIPAA standard transactions. Every NPI contains 10 digits. The number does not include information that identifies the provider’s:
An NPI also does not expire. However, providers must keep their NPI information accurate and update certain information when it changes. |
Who Issues NPI Numbers?
The Centers for Medicare & Medicaid Services (CMS) oversees the NPI system.
CMS works with NPI Enumerator, which processes NPI applications and updates.
Healthcare providers can apply through the official National Plan and Provider Enumeration System (NPPES).
Providers should use official CMS resources when applying for an NPI.
Be careful with third-party websites that charge unnecessary fees for NPI applications.
In general, providers can obtain an NPI directly through the official NPPES process without paying an application fee.
Who Needs an NPI Number?
The HIPAA regulations identify certain healthcare providers as covered entities that must obtain an NPI for use in standard transactions.
Healthcare providers who may need an NPI include:
- Physicians.
- Dentists.
- Psychologists.
- Therapists.
- Clinical social workers.
- Nurse practitioners.
- Physician assistants.
- Chiropractors.
- Physical therapists.
- Occupational therapists.
- Speech language pathologists.
- Certified nurse midwives.
- Pharmacists.
- Hospitals.
- Clinics.
- Group practices.
- Nursing facilities.
- Home health agencies.
- Laboratories.
- Ambulance services.
- Other eligible healthcare organizations.
The exact NPI requirement depends on the provider’s role and whether the provider conducts or participates in HIPAA covered transactions.
A provider who does not conduct standard electronic transactions personally may still need an NPI for other administrative or enrollment purposes.
Always check the requirements of the relevant health plan and program.
What Is an NPI Type 1?
NPI Type 1 identifies an individual healthcare provider.
Examples include:
- Physicians.
- Dentists.
- Psychologists.
- Nurse practitioners.
- Physician assistants.
- Physical therapists.
- Occupational therapists.
- Social workers.
An individual provider generally receives one Type 1 NPI.
That NPI stays with the individual even if the provider:
- Changes employers.
- Moves to another state.
- Changes practice locations.
- Changes specialties.
- Joins a new group practice.
The provider should update the NPPES record when applicable information changes.
What Is an NPI Type 2?
NPI Type 2 identifies an organization or healthcare provider organization.
Examples may include:
- Group practices.
- Hospitals.
- Clinics.
- Corporations.
- Nursing facilities.
- Home health agencies.
- Laboratories.
An organization may need a Type 2 NPI in addition to the individual Type 1 NPIs of the healthcare professionals who work for or with the organization.
For example, imagine a medical practice with five physicians.
Each physician may have an individual Type 1 NPI.
The practice itself may also have a Type 2 NPI.
The organization and the individual providers therefore have separate NPIs.
NPI Type 1 vs Type 2
| Feature | Type 1 NPI | Type 2 NPI |
| Identifies | Individual provider | Organization |
| Examples | Physician, psychologist, therapist | Clinic, group practice, hospital |
| Assigned to | Individual | Organization |
| Changes when provider changes jobs? | No | Organization keeps its NPI |
| Common Billing Use | Individual provider identification | Group or organizational billing |
| Can a practice have one? | No, unless the practice qualifies as an individual provider | Yes, when eligible |
The correct NPI depends on who provides or bills for the service.
How to Get an NPI Number: A Step-by-Step Process
Healthcare providers can apply for an NPI through the official NPPES system.
The application process generally involves several steps.
Step 1: Determine Which NPI Type You Need
First, determine whether you need:
Type 1, for an individual provider.
Or:
Type 2, for an eligible organization.
An individual provider generally applies for a Type 1 NPI.
An eligible healthcare organization generally applies for a Type 2 NPI.
Some organizations may also need to associate individual provider NPIs with the organization’s NPI during payer enrollment.
Step 2: Gather Your Information
Before starting the application, gather the required information.
For an individual provider, this may include:
- Full legal name.
- Social Security number.
- Date of birth.
- Mailing address.
- Practice location.
- Business mailing address.
- Telephone number.
- Provider taxonomy code.
- State license information, when applicable.
- Other required identifying information.
For an organization, the application may require:
- Legal business name.
- Employer Identification Number, or EIN.
- Organization address.
- Mailing address.
- Authorized official information.
- Provider taxonomy.
- Contact information.
The exact information required may vary depending on whether you apply as an individual or organization.
Step 3: Select the Correct Taxonomy Code
The NPI application requires a healthcare provider taxonomy code.
Taxonomy codes classify the type, classification, and specialization of healthcare providers.
For example, a provider may select a taxonomy that corresponds with:
- Family medicine.
- Psychiatry.
- Psychology.
- Clinical social work.
- Physical therapy.
- Occupational therapy.
- Dentistry.
Choosing the correct taxonomy matters because payers may use taxonomy information during the provider credentialing and enrollment process.
However, the taxonomy code does not replace the provider’s license or credential.
Providers should select the taxonomy that most accurately represents their professional classification and specialty.
Step 4: Submit Your NPI Application
Providers can apply through NPPES.
The official application process allows eligible providers to submit their information electronically.
Some providers may also use an authorized third party or an Electronic File Interchange Organization, depending on the available application process.
If you apply directly through NPPES, carefully review all information before submitting.
A small error in your legal name, address, taxonomy, or other information can create problems during payer enrollment.
Step 5: Receive Your NPI
After the application processes, the provider receives an NPI.
The NPI becomes the provider’s unique 10-digit identifier.
Keep a record of the NPI and use it consistently when completing payer enrollment and other applicable healthcare transactions.
How Long Does It Take to Get an NPI?
The processing time can vary depending on the application method and whether the application contains complete and accurate information.
Electronic applications generally offer a faster process than paper applications.
However, providers should not confuse NPI issuance with payer credentialing.
Getting an NPI does not automatically enroll you with:
- Medicare.
- Medicaid.
- Blue Cross Blue Shield.
- Aetna.
- UnitedHealthcare.
- Cigna.
- Other commercial insurance companies.
Payer enrollment and credentialing involve separate processes.
A provider may receive an NPI quickly but still wait weeks or months for payer credentialing.
How Much Does an NPI Number Cost?
Applying for an NPI through the official NPPES process does not require an application fee.
Providers should be cautious if a website asks them to pay a fee simply to obtain an NPI.
Third party companies may offer additional administrative services for a fee, but providers can apply directly through the official NPI system.
Does an NPI Number Expire?
No.
An NPI does not have an expiration date.
However, providers must maintain accurate information associated with the NPI.
If your information changes, you may need to update your NPPES record.
For example, you may need to update:
- Practice address.
- Mailing address.
- Phone number.
- Taxonomy information.
- Other required information.
Keeping NPI information current helps prevent problems with payer enrollment and healthcare transactions.
How to Update Your NPI Information
Healthcare providers should update their NPI information when required.
For example, suppose a physician moves from one practice location to another.
The provider should review the NPPES record and update the applicable information.
The same applies when an organization:
- Changes its business address.
- Opens a new location.
- Changes relevant contact information.
- Changes other information that the NPI record requires providers to maintain.
However, updating NPPES does not automatically update every insurance company’s records.
This point creates confusion for many providers.
If a physician updates an address in NPPES, the practice may still need to notify:
- Medicare.
- Medicaid.
- Commercial payers.
- Clearinghouses.
- Credentialing organizations.
- Other entities that maintain provider records.
Each payer may have its own update process.
NPI vs Tax ID: What’s the Difference?
Many providers confuse an NPI with a Tax Identification Number.
They serve different purposes.
| Identifier | Purpose |
| NPI | Identifies healthcare providers in standard healthcare transactions |
| EIN | Identifies a business for tax purposes |
| SSN | Identifies an individual for federal tax and other purposes |
| Medicare PTAN | Identifies a provider for Medicare enrollment purposes |
| Medicaid Provider ID | Identifies a provider within a state Medicaid program |
A practice may use an NPI and Tax ID together during insurance enrollment and claim submission.
For example, a group practice may submit claims using:
- The group’s Type 2 NPI.
- The rendering provider’s Type 1 NPI.
- The group’s Tax ID.
- The patient’s insurance information.
The exact claim structure depends on the payer and billing arrangement.
NPI vs Medicare PTAN
An NPI and a Medicare PTAN are not the same.
The NPI identifies the provider within the national NPI system.
The PTAN, or Provider Transaction Access Number, relates to Medicare enrollment.
A provider may need both.
Obtaining an NPI does not automatically enroll the provider in Medicare.
The provider must complete the appropriate Medicare enrollment process separately.
NPI vs Medicaid Provider Number
Medicaid programs operate at the state level.
A state Medicaid program may assign a provider identification number or another identifier after enrollment.
The NPI does not replace the state’s Medicaid provider number.
A provider may therefore have:
- A Type 1 NPI.
- A Type 2 group NPI.
- A Medicaid provider ID.
- A Medicare PTAN.
- A Tax ID.
Each identifier serves a different function.
Can a Provider Have More Than One NPI?
Generally, an individual healthcare provider should have only one Type 1 NPI.
An individual should not obtain a new NPI simply because they:
- Move to another state.
- Change employers.
- Change practice locations.
- Change specialties.
Instead, the provider should update the existing NPI record when required.
Organizations may have different NPI considerations depending on their structure and business arrangements.
A healthcare organization should review NPI rules carefully before applying for multiple Type 2 NPIs.
Does an NPI Identify a Provider’s Specialty?
No.
The NPI itself does not encode the provider’s specialty.
The NPI is simply a unique 10-digit identifier.
The provider’s taxonomy code provides classification information.
The provider may also maintain separate specialty information through payer enrollment and credentialing systems.
For example, a physician may have one NPI but maintain different payer enrollment records for different specialties or practice locations.
Can You Change an NPI Number?
In most cases, providers keep the same NPI throughout their professional career or organizational existence.
An individual provider generally does not receive a new NPI simply because they:
- Change jobs.
- Move.
- Change practice locations.
- Join another group.
- Leave a group.
Certain exceptional circumstances may require a new NPI, particularly for organizations.
Providers should review official NPPES guidance before requesting a new NPI.
Obtaining unnecessary NPIs can create billing and credentialing complications.
Common NPI Mistakes Providers Should Avoid
Confusing NPI With a License
An NPI does not authorize you to practice medicine or another healthcare profession.
Your state license establishes your professional authorization.
Maintain your license separately and keep your NPI record accurate.
Assuming NPI Means Payer Enrollment
Receiving an NPI does not mean that you can automatically bill Medicare or commercial insurance.
Complete the appropriate credentialing and payer enrollment process.
Using the Wrong NPI on Claims
Individual and organizational NPIs serve different purposes.
Confirm which NPI the payer expects for the billing, rendering, and referring provider fields.
Forgetting to Update NPPES
Outdated information can create problems during payer enrollment and claim processing.
Review your NPI information regularly and update required information when changes occur.
Applying for a New NPI After Changing Jobs
An individual provider generally keeps the same Type 1 NPI.
Update your practice and contact information instead of applying for another individual NPI.
Final Thoughts
An NPI number may look like a simple 10-digit identifier, but it plays a central role in healthcare administration.
Providers use NPIs throughout the healthcare revenue cycle, including payer enrollment, credentialing, claims, referrals, and other standard transactions.
However, an NPI does not replace a professional license, Tax ID, Medicare enrollment, Medicaid enrollment, or payer credentialing.
Understanding the difference between these identifiers can help healthcare providers avoid common enrollment and billing problems.
If you’re starting a new practice, joining a group, enrolling with insurance companies, or preparing to submit claims, make sure you understand which NPI applies to you and your organization.
Most importantly, keep your information accurate and remember that updating NPPES does not automatically update every payer record.
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Obtaining an NPI is only the first step toward getting reimbursed by insurance companies. Before you can submit claims and receive payments, you’ll also need provider credentialing, payer enrollment, CAQH profile management, Medicare and Medicaid enrollment, and ongoing revenue cycle support.
At UControl Billing, we help healthcare providers across the United States navigate every stage of the enrollment process from obtaining an NPI to completing insurance credentialing and optimizing medical billing workflows. Whether you’re launching a new practice, joining a group, or expanding your network participation, our specialists help reduce delays and keep your practice revenue-ready.
Contact UControl Billing today for expert assistance with NPI applications, provider credentialing, payer enrollment, and end-to-end medical billing services.
Frequently Asked Questions
Do I Need an NPI Before Applying for Insurance Credentialing?
Yes. Most commercial insurance companies, Medicare, Medicaid, and other healthcare payers require providers to have an active National Provider Identifier (NPI) before beginning the credentialing and provider enrollment process. Your NPI serves as your primary identifier during payer enrollment, CAQH profile setup, claims processing, and electronic healthcare transactions.
Can I Bill Insurance Without an NPI Number?
Generally, no. Healthcare providers who submit HIPAA-covered electronic claims must use an NPI when billing Medicare, Medicaid, and most commercial insurance plans. Even if you work within a group practice, your individual Type 1 NPI is typically required as the rendering provider, while the organization may bill under its Type 2 NPI.
What Is the Difference Between an NPI and a Provider Taxonomy Code?
An NPI is a unique 10-digit identifier assigned to a healthcare provider or organization. A provider taxonomy code, developed by the National Uniform Claim Committee (NUCC), identifies the provider’s classification, specialty, and area of practice. Insurance companies often use both the NPI and taxonomy code during credentialing, provider enrollment, and claims adjudication.
Does Getting an NPI Automatically Enroll Me With Medicare or Commercial Insurance?
No. Receiving an NPI does not automatically enroll you with Medicare, Medicaid, or commercial insurance companies. Providers must separately complete payer credentialing, provider enrollment, and contracting requirements. Medicare providers typically complete enrollment through PECOS, while commercial payers follow their own enrollment procedures.
What Is CAQH, and Why Is It Important After Getting an NPI?
The Council for Affordable Quality Healthcare (CAQH) Provider Data Portal stores provider credentials that many commercial insurance companies use during credentialing. After obtaining your NPI, creating and maintaining an accurate CAQH profile can help streamline enrollment with multiple insurance networks and reduce administrative delays.
Can a Solo Practice Have Both a Type 1 and Type 2 NPI?
Yes. An individual healthcare provider operating a solo practice generally has a Type 1 NPI for themselves and may also obtain a Type 2 NPI for the business entity if the practice qualifies as an organization. Many insurance companies require both identifiers during billing and provider enrollment.
Does Updating My NPI Automatically Update My Insurance Credentialing Records?
No. Updating your information in the National Plan and Provider Enumeration System (NPPES) only updates your NPI record. You must also notify Medicare, Medicaid, commercial insurance companies, clearinghouses, and credentialing organizations of changes to your practice address, phone number, legal name, or other enrollment information to avoid claim delays or payment issues.
How Does an NPI Fit Into the Medical Billing Revenue Cycle?
An NPI plays an essential role throughout the healthcare revenue cycle. It is used during provider credentialing, payer enrollment, insurance eligibility verification, claims submission, payment processing, electronic remittance advice (ERA), and claims auditing. Accurate NPI information helps reduce claim rejections, prevent reimbursement delays, and support compliant medical billing.
Can Healthcare Organizations Have More Than One Type 2 NPI?
Yes. Depending on their legal structure, locations, and billing arrangements, healthcare organizations may qualify for multiple Type 2 NPIs. Hospitals, health systems, large physician groups, and organizations with separate business entities should review CMS and NPPES guidance to determine the appropriate NPI structure before enrolling with insurance payers.
Why Is Choosing the Correct Taxonomy Code Important?
Selecting the correct provider taxonomy code helps insurance companies identify your specialty during credentialing and claims processing. Using an incorrect taxonomy code may delay payer enrollment, affect network participation, or result in claim denials if the specialty does not match your licensing or contracted services.
