NPI Type 1 vs. Type 2: Entity Types Explained

Every NPI record in the federal NPPES database carries an entity type code of 1 or 2. The code looks like a minor technical detail, but it determines how a provider applies for the number, what identifying information CMS collects, how the NPI appears on claims, and whether a provider may need more than one number. Misunderstanding it is one of the most common causes of credentialing delays and claim rejections for new practices.

The Two Entity Types at a Glance

Type 1: Individual Providers

A Type 1 NPI is issued to a health care provider who is an individual human being. The federal rule is direct on this point: if an individual furnishes health care, that individual is a health care provider and is assigned an NPI with an entity type code of 1.^[2]

The defining constraint of Type 1 is its permanence and singularity. An individual may obtain only one NPI, no matter how many specialties (taxonomies), state licenses, or practice locations they accumulate over a career.^[3] A physician who is licensed in three states, practices at four locations, and holds both an internal medicine and a cardiology taxonomy still has exactly one Type 1 NPI. All of that additional detail lives inside the single NPI record, not in additional numbers.

Importantly, an individual's eligibility for a Type 1 NPI is entirely separate from their employment. A physician employed by a hospital is not a "part" of the hospital for enumeration purposes. Individuals are legal entities in their own right, and their Type 1 NPI belongs to them personally, not to any employer.^[2] When the physician changes jobs, the NPI goes with them.

Sole Proprietors: Still Type 1

This is where the first wave of confusion usually hits. A sole proprietorship is a form of business in which one person owns all the assets and is personally liable for all the debts. Because the business and the person are legally the same, CMS treats a sole proprietorship as an individual. It receives a Type 1 NPI, and only one.^[3]

The NPPES record carries a "sole proprietor" flag, visible in the public data, so health plans can distinguish a sole proprietor from other individual providers. The flag has three values: Y for yes, N for no, and X for not answered.^[5]

Type 2: Organizations

A Type 2 NPI is issued to a health care provider that is not a human being: a corporation, partnership, group practice, or institution that renders care or furnishes health care supplies. The Final Rule's examples span the full breadth of the industry, from hospitals and clinics to laboratories, ambulance companies, health maintenance organizations, durable medical equipment suppliers, and pharmacies.^[2] For NPI purposes, CMS makes no distinction between a "group" and any other organization; both are simply Type 2.^[2]

Unlike individuals, organizations are not limited to a single NPI. A health system can enumerate its components separately, which is where subparts come in (covered below). The application for a Type 2 NPI requires the organization's Legal Business Name exactly as filed with the IRS, its EIN, and an Authorized Official who takes responsibility for the accuracy of the record.^[3]

Group practices also report a group taxonomy on their Type 2 record: 193200000X for a multi-specialty group or 193400000X for a single-specialty group.^[5] You will see these codes frequently when looking up organizational NPIs in the registry.

When One Provider Needs Both Types

Here is the scenario that generates more questions than any other: a physician, therapist, or other practitioner forms a legal business entity, commonly an LLC, professional corporation (PC), or professional association (PA), and practices through it.

The moment the business becomes a separate legal entity, two health care providers exist where there used to be one. The individual still renders care, so they keep their Type 1 NPI. The corporation is now an organization health care provider in its own right, so it obtains its own Type 2 NPI. CMS states this explicitly: incorporated individuals may obtain NPIs for themselves as Entity Type 1 and may obtain NPIs for their corporations as Entity Type 2, and solely owned corporations that are health care providers obtain NPIs as Entity Type 2.^[3]

Medicare enrollment reflects the same logic. The official PECOS checklist for sole proprietors and solely owned organizations draws the line cleanly: sole proprietors only need a Type 1 NPI, while solely owned organizations such as an LLC or PC need both a Type 1 (individual) NPI and a Type 2 (organization) NPI.^[4]

Subparts: Organizations Within Organizations

Large organizations rarely operate as a single undifferentiated unit. A hospital system may include a rehabilitation facility, a hospice, several outpatient clinics, and a pharmacy, each with its own operations and billing arrangements. CMS calls these components subparts: a subpart may be a different location or may furnish a different type of health care than the parent organization.^[3]

Subparts can be enumerated with their own Type 2 NPIs. Because a subpart is an organization, it always receives entity type code 2, never 1.^[2] A few rules govern how this works:

• Subparts are not legal entities. The legal entity is the parent organization. The subpart exists as an operational component, which is exactly why NPPES asks for the parent's Legal Business Name and Taxpayer Identification Number on the subpart's application.^[3]
• A subpart with its own EIN uses its own. If the subpart has its own LBN and EIN separate from the parent's, it submits those instead, while still answering yes to the subpart question.^[3]
• Employed individuals are not subparts. A physician working for the hospital is a legal entity in their own right with their own Type 1 NPI; they are never enumerated as a subpart of the organization.^[2]
• Health plans choose what to enroll. A health plan may enroll none, one, or several of an organization's enumerated subparts, but it may not force a provider that already has an NPI to obtain another one.^[2]

In the public NPPES data, subpart status is visible through the "Is Organization Subpart" field, along with the parent organization's LBN where reported.^[5]

Why the Distinction Matters in Billing

For billers and credentialing staff, the entity type is not trivia; it determines which number goes where. On a typical professional claim, the Type 1 NPI identifies the rendering provider, the individual who actually performed the service, while the Type 2 NPI identifies the billing organization that receives payment. When a solo incorporated physician bills with only their Type 1, or a group submits a claim with the individual's NPI in the billing field, payers reject or delay the claim because the numbers do not match the enrollment records on file.

The distinction also matters for verification work. If you are confirming a referring physician, you need their Type 1. If you are setting up electronic payments to a practice, you need the Type 2 tied to the practice's EIN and enrollment. Pulling the wrong type from a registry search is an easy mistake when a practice and its owner share a nearly identical name, which is precisely why our search results label every record as an individual or an organization.

How to Check an NPI's Type

The entity type code is part of every public NPI record, so checking is quick. Look up the provider by name or NPI number, and the profile will identify the record as an individual (Type 1) or an organization (Type 2), along with the sole proprietor flag, subpart status, and parent organization where applicable. If you only have a number and want to confirm it is structurally valid before searching, the validation tool checks the format and check digit first.

Common Scenarios, Answered

If your situation does not map cleanly onto one of these rows, the deciding question is almost always the same: is there a legal entity separate from the individual? If yes, that entity is eligible for its own Type 2 NPI. If no, the individual's single Type 1 covers everything. For guidance on actually obtaining either type, see our step-by-step guide to applying for an NPI.