Types of Medical Billing: Systems, Software, and Examples

The types of medical billing a practice uses decide how quickly claims go out, how often they get denied, and how fast payments come in. There is no one-size-fits-all setup. A solo clinic, a home health agency, and a hospital network all bill differently, and using the wrong system leads to revenue leakage and extra admin work.

This guide covers the main medical billing types: the three billing systems in healthcare, the software behind them, the two claim formats, the providers who bill, and real examples of medical billing in practice.

The types of medical billing fall into four groups: billing systems (closed, open, isolated), billing software (standalone, integrated, cloud-based), claim types (professional and institutional), and billing models (in-house, outsourced, hybrid). Each group affects how data moves from patient visit to payment.

Quick reference:

• Billing systems: closed, open, isolated
• Software: practice management, EHR-integrated, cloud-based, on-premise
• Claim types: professional (CMS-1500) and institutional (UB-04)
• Billing models: in-house, outsourced, hybrid

The three different types of billing systems in healthcare are closed, open, and isolated. A billing system’s definition is simple: it is the combination of records, software, and workflows a practice uses to capture charges, submit claims, and collect payment. The three types differ in who can access that data.

A closed medical billing system keeps patient records and billing data inside one practice or facility. It runs on an Electronic Medical Record (EMR), which works like a digital paper chart. Physicians in the same office can share it, but it is hard to use outside that practice.

• Best for: Small, independent practices with a few physicians and a simple internal workflow.
• Key uses: Tracking vitals and vaccinations, monitoring preventive screening dates, and building internal treatment plans.
• Example: A two-physician family clinic that bills only from its own EMR.

An open medical billing system lets patient data move beyond a single practice to payers, labs, specialists, and billing teams. It uses Electronic Health Records (EHR), which are built to be accessed by authorized professionals across organizations.

• Best for: Larger organizations with multiple departments or providers, and practices that outsource their revenue cycle.
• Key uses: Storing full medical histories (allergies, medications, lab results), sharing data with imaging centers and specialists, and giving billing experts secure remote access.
• Example: A multi-specialty group that shares records with outside labs and sends claims through an external billing partner.

An isolated system is maintained by the patient, not the provider. It uses Personal Health Records (PHR). It does not replace the legally recognized EMR or EHR, but it supports them.

• Best for: Patient-centered record-keeping and better provider-patient communication.
• Key uses: Giving accurate history at registration, tracking chronic conditions, and keeping personal copies of treatments.
• Example: A patient with a chronic condition who brings their own health log to each visit.

Types of medical billing software are grouped by how they are built and hosted. The right choice depends on practice size, budget, and how much integration you need with your EHR and payers.

• Standalone practice management software: Handles scheduling, charge entry, and claims separately from the clinical record.
• EHR-integrated billing software: Billing sits inside the EHR, so documentation flows straight into charges.
• Cloud-based software: Hosted online, accessible from anywhere, and updated by the vendor.
• On-premise software: Installed on your own servers, with more control but higher maintenance cost.
• Clearinghouse tools: Scrub claims for errors before they reach payers.

Software only works as well as the process behind it. Clean claims depend on accurate medical coding and on eligibility and benefits verification before the visit.

The two different types of billing for claims are professional and institutional. Professional billing covers services from individual practitioners and uses the CMS-1500 form. Institutional billing covers facility services and uses the UB-04 form.

• Professional billing (CMS-1500): Physician offices, clinics, therapists, and other individual providers.
• Institutional billing (UB-04): Hospitals, skilled nursing facilities, home health agencies, and similar facilities.

A type of bill (TOB) is a three-digit code on the UB-04 that tells the payer what kind of facility is billing, how the service was delivered, and whether the claim is new, a replacement, or a void. Each billing type code has three parts:

1. First digit: Facility type (for example, 1 for hospital, 3 for home health).
2. Second digit: Bill classification (for example, inpatient or outpatient).
3. Third digit: Frequency (for example, 1 for a standard claim, 7 for a replacement claim, 8 for a void).

Entering the wrong code is a common cause of rejected facility claims, so it is worth checking before submission. Cleaner submissions also come from a dedicated claims submission process.

Types of providers in medical billing include individual practitioners, facilities, and ancillary service providers. Each type bills differently and uses a different claim form and National Provider Identifier (NPI).

• Individual practitioners: Physicians, nurse practitioners, physician assistants, therapists, and chiropractors. These are Type 1 NPIs.
• Facilities and organizations: Hospitals, clinics, skilled nursing facilities, and home health agencies. These are Type 2 NPIs.
• Ancillary providers: Laboratories, radiology and imaging centers, and durable medical equipment (DME) suppliers.

I-Conic Solutions supports specialties across this range, including urgent care, home health, radiology, lab, and DME. You can see how it works in practice in our urgent care billing case study.

Examples of medical billing show how these types work together in real settings:

• Solo family practice: Uses a closed EMR system, bills on the CMS-1500, and handles billing in-house.
• Hospital outpatient department: Uses an open EHR system, bills on the UB-04 with a type of bill such as 131 (hospital outpatient, standard claim), and works with several payers.
• Urgent care facility: Uses an open system and outsources billing to a specialist partner to shorten the time to payment.
• Home health agency: Bills institutionally on the UB-04 with a home health type of bill and tracks episodes through the EHR.

Medical billing types also differ by who does the work.

• In-house: Your own staff handle billing. You have full control but carry hiring, training, and software costs.
• Outsourced: A partner manages the revenue cycle end to end. This reduces overhead and brings in specialized expertise.
• Hybrid: Staff handle front-end tasks, while a partner manages claims, denials, and collections.

If you’re weighing the outsourcing route, read why outsource revenue cycle management and how to improve revenue cycle management.

Match the billing type to your practice size, payer mix, and growth plans.

1. Practice size: Small practices often start closed. Growing groups usually need an open system.
2. Claim volume and payers: More payers mean more need for data sharing and claim scrubbing.
3. Staff capacity: If denials and AR follow-up pile up, consider denial management and AR services.
4. Cost and scalability: Compare software fees, staffing costs, and outsourcing fees over time.

“The team has demonstrated that they are capable of leading effective teamwork, and the proof is in our collections. They have been leading our billing team since May, when we transitioned from our former billing company. They lead the setup of their team and ensure a seamless transition. They have identified a number of areas for improvement that have resulted in more cash in the bank.”

CFO, New York-based Urgent Care Facility

The types of medical billing may look complex, but the choice comes down to a few questions: who needs access to your data, which claim form you file, and who does the work. Closed systems protect privacy, isolated systems boost patient engagement, and open systems give growing practices the flexibility to scale.

At I-Conic Solutions, we help practices work across all of these setups. Outsource your medical billing to us and get a partner that knows how to turn your system into faster, cleaner payments.