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Billing Basics Guide

Provider Types

Who rendered the service, who is billing, and what kind of entity they are - these three answers decide the claim form, the NPI type and the payer rules. Get them wrong and nothing else on the claim matters.

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The Landscape

Types of Healthcare Providers

Every provider falls into one of these buckets.

Individual Practitioners

Physicians (MD/DO), nurse practitioners, physician assistants, dentists, podiatrists, optometrists, chiropractors. Each bills under an individual Type 1 NPI.

PCPs vs Specialists

Primary care manages the patient; specialists take referrals. HMO plans often require the PCP referral on file before the specialist claim pays.

Rendering vs Billing vs Referring

Rendering performed the service. Billing gets paid. Referring ordered it. A claim can carry all three - and each NPI must be valid and enrolled.

Facilities and Organizations

Hospitals, ASCs, SNFs, home health, hospice, labs, imaging centers, DME suppliers, FQHCs. Bill on UB-04/837I under a Type 2 organizational NPI.

Billing Identity

Provider Type, NPI and Claim Form

How each provider type shows up in billing.

Provider typeNPI typeClaim form
Solo physicianType 1 (individual)CMS-1500 / 837P
Group practiceType 2 (organization) + Type 1 renderingCMS-1500 / 837P with both NPIs
Hospital / facilityType 2 (organization)UB-04 / 837I
Lab / imaging centerType 2 (organization)CMS-1500 / 837P (or UB-04 for hospital-based)
DME supplierType 2 (organization)CMS-1500 / 837P to the DME MAC
FQHC / RHCType 2 (organization)UB-04 / 837I with special bill types
Why It Matters

Where Provider Type Breaks Claims

The mismatches we fix most often.

  • Rendering NPI not enrolled with the payer on the date of service - the claim cannot pay
  • Group billing under an individual NPI instead of the Type 2 organizational NPI
  • Referring provider NPI missing on claims for referred services (DME, lab, imaging)
  • Facility services billed on a CMS-1500 instead of UB-04, or the reverse
  • Locum tenens billing without the Q6 modifier and proper documentation
  • Credentialing gaps: services scheduled before the provider's payer effective date
FAQ

Questions, Answered

Straight answers, no jargon.

What is the difference between Type 1 and Type 2 NPI?
Type 1 identifies an individual provider - a physician, NP or PA. Type 2 identifies an organization - a group practice, hospital or lab. Group claims carry both: the Type 2 billing NPI and the Type 1 rendering NPI.
What is the difference between rendering, billing and referring providers?
The rendering provider performed the service. The billing provider is the entity getting paid. The referring provider ordered it. DME, lab and imaging claims commonly need all three NPIs.
Do facilities use the CMS-1500?
No. Facilities bill on the UB-04 (CMS-1450) or electronic 837I. The CMS-1500 is for professional claims from physicians and suppliers.
What is a solo vs group practice for billing?
A solo practice bills under the physician's individual NPI. A group enrolls as an organization (Type 2 NPI) and bills for all its rendering providers under that entity.
Why do credentialing gaps kill revenue?
If the rendering provider was not credentialed with the payer on the date of service, the claim cannot be paid - and most payers will not backdate. Track effective dates like cash.
How It Works

From Leaking Revenue to Steady Cash Flow in 4 Steps

The same proven process behind every provider-enrollment engagement.

1

Free Revenue-Leak Review

Send one billing export. We map denials, AR aging and underpayments - free.

2

Recovery Plan

You get a prioritized action plan with projected recoveries before you commit.

3

We Go to Work

Denials appealed, AR worked, workflows fixed - inside your systems.

4

You Watch It Grow

Transparent reporting. You pay 5% of what we collect - nothing else.

Find Out What Your Practice Is Losing - Free.

Send one billing export. We'll show you the leaks, the stuck AR and the denials worth fighting - before you spend a dollar.

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