NPI Type 1 vs Type 2 for LLC Therapists
By George Ruan • November 30, 2025
Getting your NPIs sorted is a big step — once you're set up, Bomi can handle the billing for your LLC so you can focus on growing your practice.
If you are a mental health therapist starting a private practice and you recently formed an LLC, you have probably run into the question: What is the difference between NPI Type 1 and NPI Type 2, and do I actually need both?
This confusion is incredibly common, especially for therapists transitioning from W-2 or group settings into independent private practice.
To really understand the answer, it helps to know why NPIs exist in the first place and what problem the government was trying to solve when they created the NPI system.
Sections
Why the NPI Standard Was Created
The National Provider Identifier (NPI) was established as part of the HIPAA Administrative Simplification provisions in the late 1990s.
Before NPIs existed, healthcare providers were identified by a messy patchwork of numbers:
Different IDs for different insurance companies
Different IDs for billing vs credentialing
Social Security Numbers being used in claims and enrollment
This created massive inefficiencies, privacy risks, and billing errors across the healthcare system.
To fix this, the federal government mandated a single, standardized identifier system that would:
Uniquely identify healthcare providers nationwide
Reduce administrative overhead for payers and providers
Improve data accuracy and claims processing
Reduce reliance on SSNs in healthcare transactions
The result was the NPI standard, administered through NPPES by CMS.
Importantly, the government recognized early on that individual clinicians and healthcare organizations serve different roles, which is why NPIs were split into two types, not one.
The Core Reason behind NPI Type 1 vs Type 2
The government designed NPIs around two fundamental questions:
Who provided the healthcare service?
Who is legally and financially responsible for billing and payment?
Those are often not the same entity.
That distinction is exactly why NPI Type 1 and NPI Type 2 both exist. For example if you were working in a group prior, you the rendering provider need to be identified with an NPI Type 1, but the insurance company receives claims from the group practice you were working at which is identified with an NPI Type 2.
What Is an NPI Type 1?
An NPI Type 1 identifies an individual healthcare provider.
For therapists, this means:
You as a licensed clinician
Your professional identity
Your role as the rendering provider
This number follows you throughout your career, regardless of:
Where you work
Whether you are solo or in a group
Whether you change practices or states
From the government’s perspective, the NPI Type 1 answers: "Who personally delivered the clinical service?"
What Is an NPI Type 2?
An NPI Type 2 identifies an organization that delivers or bills for healthcare services.
This includes:
LLCs and PLLCs
Group practices
Clinics and professional entities
It is tied to:
A legal business name
An EIN
A practice address
From the government’s perspective, the NPI Type 2 answers: "Which organization is billing for and receiving payment for this care?"
Why This Matters for Therapists Forming an LLC
When you form an LLC, you are creating a separate legal entity from yourself as an individual.
The NPI system was explicitly designed to support that separation.
If you bill insurance under your LLC:
The government expects the organization to be identifiable
Insurance companies expect a billing provider NPI
Payments are expected to flow to the business, not the individual
That is what the NPI Type 2 enables.
Do Therapists With an LLC Need an NPI Type 2?
In most cases, yes.
You likely need an NPI Type 2 if:
You formed an LLC or PLLC
You bill insurance under your practice name
You use a business bank account
You enroll your practice with insurance payers
You plan to enroll in Medicare under your entity
Even single-member LLCs fall squarely into the use case the NPI Type 2 was designed for.
Without it, payers often default to treating you as an individual-only provider, which defeats the purpose of having an LLC. The insurance company would be paying you, not your LLC, which means you would lose all LLC protections.
Final Thoughts
The difference between NPI Type 1 and NPI Type 2 is not arbitrary. It reflects a deliberate government effort to modernize healthcare administration, reduce errors, and protect provider identity.
If you just formed an LLC for your therapy practice, applying for an NPI Type 2 is not just a bureaucratic checkbox. It is aligning your practice with the way the healthcare system was intentionally built to work.
Understanding this early saves significant cleanup later.
Find your Medicaid provider login
Frequently Asked Questions
Do I still need an NPI Type 2 if I am the only clinician in my LLC?
Yes. Even a single-member LLC is treated as a distinct business entity for billing purposes, so insurance companies and Medicare expect the organization to have its own NPI Type 2 in addition to your individual Type 1.
Which NPI do I list on insurance applications and claims?
List your NPI Type 1 wherever the payer asks for the rendering or treating provider, and use your NPI Type 2 when the application or claim asks for the billing provider, pay-to information, or practice entity.
Can I just use my EIN to identify the LLC instead of an NPI?
No. The EIN identifies your business for tax reporting, but payers require the standardized NPI Type 2 to track healthcare organizations in credentialing, enrollment, and claims systems.
What happens if I submit claims without an NPI Type 2?
Payers may default to paying you as an individual, which can jeopardize your LLC protections, delay reimbursement, or cause claims to reject because the billing provider does not match the enrolled entity.
Need help getting payer-ready?
For practices enrolled in Bomi Billing, our team handles CAQH, payer applications, attestations, roster updates, and ongoing credentialing. Credentialing requires Bomi Billing.
Credentialing with billing
About Bomi
Founded by George Ruan, Dax Earl, and Andrey Goder, Bomi helps independent therapists and group practices with insurance billing, credentialing, and payer follow-up. Bomi grew out of Dax’s experience helping his mother with her therapy practice, with a clear purpose: reduce the administrative burden of insurance while keeping practice owners in control.
Meet our founders