How to Choose the Correct NPI Type for Your Practice
Step-by-step guidance for choosing the right NPI Type for your practice. Streamline coding, billing, and compliance with confidence.
Healthcare executives and practice leaders have to make administrative decisions that affect revenue cycle performance. One of these decisions, and one of the most fundamental and often misinformed, is in the selection of the appropriate NPI type. The wrong NPI could result in claim denials, credentialing delays, enrollment complications, and compliance problems that impact your entire revenue cycle.
Healthcare decision makers will find specific, actionable advice in this article to help them choose a NPI type that is appropriate for their practice. Providers can protect the revenue cycle and prevent those disruptions by knowing the difference between Type 1 and Type 2 NPIs and how they operate in the billing environment.
What Is an NPI and Why Does the Type Matter?
National Provider Identifier (NPI) is a 10-digit number assigned by Centers for Medicare and Medicaid Services (CMS) via the NPPES. Established under HIPAA, the NPI replaced the unique provider identifiers that different payers previously required. Prior to adoption of the NPI requirement in 2007, one provider may have dozens of different Medicare, Medicaid, and commercial insurance ID numbers.
The NPI is a single identifier which is unique and permanent and will follow providers throughout their careers. There are two types of NPIs, though, and they will serve different purposes when used on a healthcare claim. One of the most common and preventable reasons for claim denials and billing errors.
The Executive Case for Correct NPI Selection
For health executives, the choice of the NPI Type isn’t just a matter of administration. It’s a strategic choice that has an immediate impact on revenue cycle performance, efficiency, and compliance risk.
Financial Impact of Incorrect NPI Selection
| Consequence | Financial Impact |
|---|---|
| Claim Denials | $50,000 – $500,000+ annually |
| Credentialing Delays | 60 – 120 days revenue delay per provider |
| Payment Delays | 30 – 90 days per claim |
| Administrative Rework | $25,000 – $150,000 annually |
| Compliance Fines | $100 – $10,000 per violation |
Warning Signs of NPI-Related Problems
| Warning Sign | What It Indicates |
|---|---|
| Claims rejected for invalid provider ID | Incorrect NPI type or missing rendering provider |
| Credentialing applications consistently delayed | NPI data mismatches with payer files |
| Payments applied to wrong provider | Type 1/Type 2 confusion on claims |
| Audit findings related to provider identification | Incorrect NPI usage or outdated records |
NPI Type 1: Individual Providers
Individuals who directly provide healthcare services to patients are assigned type 1 NPI. This encompasses doctors, nurse practitioners, physician assistants, therapists, psychologists, dentists and any other licensed individual providing patient care.
Key Characteristics
The individual provider belongs to the Type 1 NPI not an organization. It stays with that provider for life, no matter where they practice, how many providers they have, their specialty or employer. Only one provider is assigned a Type 1 NPI and no more than one provider can be assigned a Type 1 NPI.
Who Needs a Type 1 NPI?
HIPAA requires every person who offers health care services and bills for them, prescribes health care services and medicines, or engages in HIPAA standard electronic transactions to have a Type 1 NPI. All providers, even those who receive only cash-pay patients should get an NPI because electronic prescribing systems and many state licensing agencies require it.
Billing Implications
If an individual provider renders a service, the claim will include only that individual provider’s Type 1 NPI. This will tell you who was in charge of the service. In certain cases, the Type 1 NPI may serve as both the billing provider identifier and the rendering provider identifier for solo practitioners who are sole proprietors.
NPI Type 2: Organizational Providers
A Type 2 NPI is used by a healthcare entity that bills for its services using its own name and Tax ID. This includes group practices, hospitals, clinics, nursing homes, pharmacies, home health agencies, laboratories and other healthcare facilities.
Key Characteristics:
The Type 2 NPI is an organization, not providers within that organization. Type 2 NPIs can be multiple for an organization if they have multiple locations, or different billing methods for various departments or subparts.
Who Needs a Type 2 NPI?
Healthcare organizations that file claims using its Employer Identification Number (EIN) and name must have a Type 2 NPI. Group practices involving two or more providers should have a Type 2 NPI for group claims and each individual provider would have their own Type 1 NPI.
Billing Implications
If a group practice submits a claim the Type 2 NPI is listed in the billing provider field and the rendering provider is the Type 1 NPI of the provider who provided the service. The insurance provider verifies the provider is credentialed and in network. Failure of either verification equals denial.
The Sole Proprietor Exception: A Common Source of Confusion
The solo practice owner case is the most confusing of all the NPI questions. A Single-owner business owned by one individual who is not a corporation or LLC and who assumes all of the business’s debts.
CMS Guidelines for Sole Proprietors
For NPI purposes, CMS uses the term sole proprietor to mean an individual, and not a separate entity. The one person who owns the practice can only have one Entity Type 1 (Individual) NPI. The sole proprietor must use their Social Security Number (SSN) to apply for an NPI, even if they already have an Employer Identification Number (EIN) for a tax or business reason.
When Does a Practice Need a Type 2 NPI?
Typically, a sole practitioner with an unincorporated practice will require only the Type 1 NPI. This is different once the practice turns into a legal entity. Generally, a Professional Corporation (PC), Limited Liability Company (LLC), partnership or other legal entity must have a Type 2 NPI. You maintain the individual healthcare provider’s Type 1 NPI as well. The Type 1 NPI is for rendering providers, and the Type 2 NPI is for the billing and administrative organization.
Do You Need Both NPI Types?
The NPI requirements depend on how your practice is legally organized.
| Practice Structure | Required NPI |
|---|---|
| Sole proprietorship (not incorporated) | Type 1 only |
| Professional Corporation (PC) | Type 1 + Type 2 |
| Limited Liability Company (LLC) | Type 1 + Type 2 |
| Partnership | Type 1 for each provider + Type 2 for the organization |
| Group practice | Type 1 for each provider + Type 2 for the organization |
NPI Requirements for Group Practices
Each group practice should have a Type 2 NPI to use for group billing. In addition, each doctor or health care professional employed in the practice should have their own Type 1 NPI. The organization’s Type 2 NPI identifies the billing provider, the rendering provider’s Type 1 NPI identifies the clinician who provided the service when a claim is submitted. Knowing these requirements will help avoid enrollment delays, claim denials, and payer enrollment problems. Prior to filing for an NPI, verify the legal structure of your practice based on state law because it will explain whether your organization requires a Type 2 NPI.
Health Systems and Multi-Location Organizations
For organizations that have multiple locations, there may be multiple Type 2 NPIs for each location if the organization has multiple tax identification numbers or processes claims separately for each location. They can also use a single Type 2 NPI with subpart identifiers to identify locations without acquiring multiple NPI Type 2.
How NPIs Work Together on Claims
Knowing the differences between Type 1 and Type 2 NPIs on standard claim forms is an important step to avoiding billing mistakes.
CMS-1500 Claim Form
| Field | NPI Type | Description |
|---|---|---|
| Box 33 (Billing Provider) | Type 2 | Organization submitting the claim |
| Box 24J (Rendering Provider) | Type 1 | Individual who delivered the service |
When a patient visits a group practice, the claim lists the group’s NPI Type 2 as the billing provider and the treating physician’s Type 1 NPI as the rendering provider. The payer checks that both the group and the individual are credentialed and in-network.
Common Errors to Avoid
| Error | Consequence |
|---|---|
| Missing rendering provider NPI | Immediate claim denial |
| Using Type 1 NPI in billing provider field | Denial for group practices |
| Using Type 2 NPI in rendering provider field | Incorrect provider identification |
| Billing under Type 1 when group contract requires Type 2 | Lower reimbursement or denial |
The most frequent error will be to enter the group’s NPI Type 2 and not the rendering provider’s Type 1 NPI. Insurers are likely to refuse such claims outright as they don’t know who did the service.
Credentialing and Payer Enrollment Implications
The implications of the NPI type selection are profound in the credentialing and enrollment with payers.
Individual Provider Credentialing
Providers who have a NPI Type 1 will need to be individually credentialed with each entity that they submit claims to. Group credentialing does not necessarily imply individual providers. New providers need to be fully credentialed with all payers before beginning to serve patients or at least before claims are submitted. It takes about 90 to 120 days for credentialing.
Organizational Enrollment
The organization also needs to be enrolled by payers as its NPI Type 2 and EIN. The claim will be denied if the organization does not have full enrollment with the payer and individual providers are creditable within the organization’s Type 2 NPI.
The Two-Part Process
A lot of practices think that, as long as their Group NPI is credentialed, all is set. But, both the organization and each individual provider must be enrolled and approved with each payer on which you bill. If this is not done, even a correctly completed claim form will result in denials.
Maintaining and Updating NPI Information
It is just as crucial to maintain NPI data up to date as it is to choose the right type the first time. Inaccurate information results in claim denials, late payment and compliance problems.
Required Updates
Providers will be required to update their NPI information for the following change:
- Practice name
- Practice address
- Provides provider status or credentials
- Taxonomy codes
- Group affiliations
All practice information should be updated in NPPES within 30 days of any changes.
Common Maintenance Mistakes
| Mistake | Consequence |
|---|---|
| Address mismatches | Claim denials, credentialing flags |
| Name changes not updated | Payer rejection of enrollment applications |
| Taxonomy code incorrect | Delays in credentialing and insurance enrollment |
| Multiple Type 1 applications | Duplicate NPI creation, compliance issues |
Address mismatches are problematic ones in particular. The practice address on your NPI should match the address you use to report to payers when you are credentialing. Claims will be denied and credentialing applications flagged for patients if a move occurs to a new office, and you do not update your NPI record.
Common NPI Selection Mistakes and How to Avoid Them
Billers, even the experienced ones, still experience issues with NPI. Knowing what these common errors are can help avoid expensive mistakes.
1. Using Type 1 for a Group Practice
There are group practices who mistakenly bill instead using individual provider Type 1 NPi instead of a NPI Type 2. This can lead to rejection of claims, incorrect payments and reporting errors. A Group Practice (GPs) with multiple providers needs to have a NPI Type 2.
2. Failing to Include Rendering Provider NPI
One of the top reasons for claim denials is when the claim is billed without the rendering provider’s Type 1 NPI and using the group’s Type 2 NPI. When billing as a group, include both NPIs.
3. Confusing Sole Proprietor and Incorporated Status
There is a risk of sole proprietors filing a Type 2 NPI, when they should be filing a Type 1. Often, solo providers will remain using just a type 1 when both are needed. Ensure legal business structure has been verified prior to application.
4. Forgetting to Update Payer Files
If you obtain a new provider, you need to have their NPI Type 1 included in your group’s profile with all insurance providers. Until this time, their claims will be denied for their services.
5. Submitting Claims Before Credentialing Completes
New Providers should be fully credentialed with all payers before seeing the patient. Denials are issued for claims that are submitted prior to the completion of credentialing.
Strategic NPI Decision Framework for Executives
The choice of NPIs should be made strategically as it can impact the revenue cycle. The efficiency of the business model, and the compliance posture of the healthcare executive.
Decision Criteria
| Factor | Consideration |
|---|---|
| Legal Business Structure | Sole proprietorship, corporation, LLC, or partnership |
| Number of Providers | Solo practitioner or multi-provider group |
| Billing Method | Claims submitted individually or organizationally |
| Growth Plans | Future hiring and expansion requirements |
| Multiple Locations | Separate billing or single billing structure |
The process of NPI registration, credentialing, and maintenance can be complex for many healthcare organizations, and professional services can help manage these tasks. With the assistance of the RCM partners, the correct NPI type is selected, claim is structured properly, timely updates are made and credentialing is coordinated with all payers.
Billing Care Solutions: Your Partner in NPI and Revenue Cycle Management
We know that selecting the right kinds of NPIs is a key component to performing well on the revenue cycle at Billing Care Solutions. We can help with NPI registration, credentialing, enrollment with payers and maintenance throughout the process.
How We Help
NPI Selection Guidance: Analyze the practice structure and legal entity and select the NPI type that is appropriate for your organization.
Credentialing and Enrollment: Manage credentialing for individual providers and organizations to support timely payer enrollment.
Payer File Updates: Ensure the coordination of payer file updates in the addition of provider, change of practice location, or updates to NPI information.
Claim Setup Verification: Check the billing system to ensure that NPI Type 1 and Type 2 are set up for each claim.
Ongoing Maintenance: Ensure the provider information in NPPES and payer files remain accurate and current.
Conclusion: The Strategic Impact of Correct NPI Selection
It is not an insignificant administrative consideration whether to use NPI Type 1 or NPI Type 2. It impacts on claim acceptance, timely reimbursements, credentialing effectiveness, compliance risk and revenue cycle outcomes all together.
Organizations choose the right type of NPI and keep their NPI data accurate, and reap the benefits of:
- Higher clean claim rates
- Faster reimbursement cycles
- Fewer credentialing delays
- Reduced compliance risk
- Improved revenue predictability
Those who do not do it right, may have to deal with claim denials, delayed payment, credentialing issues and unnecessary administrative burden. It becomes easy to decide when you have a clear idea of your practice and your legal entity. Sole proprietors only have a NPI Type 1. NPI Type 1 and Type 2 are both required for incorporated solo providers and group practices. Billing Care Solutions can assist you with your NPI type selection or any credentialing and payer enrollment needs. Talk to us today about an in-depth NPI and revenue cycle review.
