Healthcare systems do not use the same billing method for all transactions. There are different types of medical billing for every category. The 3 primary medical billing types are
- Professional billing
- Institutional billing
- Specialty billing
Each type serves different healthcare settings and uses specific billing codes to ensure accurate payment processing.
These billing types determine how services are categorized, coded, and processed across
outpatient, inpatient, and specialty care settings. Read the full blog for a better understanding.
Primary Medical Billing Types
As we discussed above, there are 3 basic types of medical billing, which are
- Professional billing handles claims for individual healthcare providers, such as physicians and therapists.
- Institutional billing processes claims for hospitals and extensive facilities.
- b manages claims for specific medical services like dental care and durable medical equipment.
Healthcare facilities use standardized bill codes to communicate services provided to insurance payers. These codes include
- Current Procedural Terminology (CPT) codes
- Healthcare Common Procedure Coding System (HCPCS) codes
- International Classification of Diseases (ICD) codes
Revenue codes categorize services for billing purposes in institutional settings.
Comparison Table of Medical Billing Types
| Billing Type | Claim Form | Primary CodesUsed | Used By | CommonServices |
| Professional Billing | CMS-1500 | CPT, HCPCS, ICD-10 | Physicians, nurse practitioners, therapists | Office visits, consultations, and outpatient procedures |
| Institutional Billing | UB-04 | Revenue codes, ICD-10, HCPCS | Hospitals, skilled nursing facilities | Inpatient stays, emergency care, and hospital outpatient services |
| Specialty Billing | Varies by specialty | CDT (dental), HCPCS (DME), CPT | Dental offices, DME suppliers, vision centers | Dental procedures, medical equipment, eyeglasses |
Types of Billing Commonly Used In Large Medical Practices
Large medical practices primarily use Institutional billing. Large practices bill facility fees, diagnostic services, and outpatient procedures using institutional claim structures.
Large medical practices use institutional billing because it:
- Supports high patient volume
- Captures facility resource usage
- Aligns with hospital-affiliated reimbursement models
Examples of large practices include multi-specialty groups, academic medical centers, and hospital-owned clinics.
Why do large medical practices prefer institutional billing?
Large medical practices prefer institutional billing because it allows accurate reimbursement for facility-based services. This billing type supports compliance, scalability, and payer requirements.
Key reasons include:
- Higher claim volume management, like outpatient imaging and lab services.
- Revenue code reporting, such as 0250 for pharmacy and 0360 for operating rooms.
- Bundled payment compatibility is used in Medicare and Medicaid programs.
List of Billing Codes Used in Medical Billing
Medical billing uses 4 primary code sets: CPT, HCPCS, ICD, and revenue codes. These standardized billing codes communicate medical services, procedures, diagnoses, and facility charges to insurance payers for reimbursement processing.
CPT Codes
CPT codes classify medical procedures and services performed by healthcare providers. The American Medical Association maintains the Current Procedural Terminology code set, which contains over 10,000 codes organized into 3 categories.
- Category I CPT codes cover standard medical procedures like office visits, surgeries, laboratory tests, and imaging studies.
- Category II codes track performance measures for quality reporting.
- Category III codes represent emerging technologies and procedures that have not yet been assigned permanent codes.
Common CPT Codes
CPT codes consist of 5 numeric digits. Code 99213 represents an established patient office visit of moderate complexity. Code 80053 represents a comprehensive metabolic panel laboratory test. Code 70450 describes a head CT without contrast.
HCPCS Codes
HCPCS codes identify medical services, supplies, and equipment not included in the CPT code set. The Healthcare Common Procedure Coding System consists of 2 levels of codes for comprehensive medical billing.
- Level I HCPCS codes are identical to CPT codes.
- Level II HCPCS codes use alphanumeric identifiers starting with letters A through V.
These codes cover ambulance services, durable medical equipment, prosthetics, orthotics, supplies, medications, and temporary procedures.
Common HCPCS Codes
Standard HCPCS codes include E0601 for continuous positive airway pressure (CPAP) devices, J0129 for abatacept injection medication, and A4253 for blood glucose test strips. Medicare and Medicaid programs require HCPCS codes for many supplies and services.
ICD Codes
ICD codes document patient diagnoses and medical conditions for billing purposes. The International Classification of Diseases code set, currently in its 10th revision (ICD-10), contains over 70,000 diagnosis codes used in the United States.
Diagnosis codes establish medical necessity for procedures and services billed to insurance companies. Claims must include appropriate ICD codes supporting the medical services provided.
Common ICD-10 Codes
ICD-10 codes use alphanumeric characters, with lengths ranging from 3 to 7 digits. The code structure provides specificity about the condition, anatomic location, and clinical details. Code E11.9 represents type 2 diabetes mellitus without complications. Code M25.561 represents pain in the right knee. Code I10 represents essential hypertension.
Revenue Codes
Revenue codes categorize hospital and facility services by department or cost center for institutional billing. The National Uniform Billing Committee maintains the revenue code list used on UB-04 claim forms.
Revenue codes are 4-digit and organized into service categories. Codes 0100-0219 cover accommodation services, including room charges. Codes 0250-0269 identify pharmacy services. Codes 0300-0329 represent laboratory services. Codes 0320-0359 cover radiology, diagnostic, and therapeutic services.
Common Revenue Codes
Standard revenue codes include 0250 for general pharmacy, 0260 for IV therapy, 0270 for medical and surgical supplies, 0300 for laboratory general classification, 0450 for emergency room services, and 0490 for ambulatory surgical care. Hospitals assign revenue codes to every service line item on institutional claims.
Conclusion
Medical billing types define how healthcare services are coded, submitted, and reimbursed across small clinics and large medical practices. Professional billing supports provider services, while institutional billing supports large practices through structured billing codes, revenue codes, and bill types. Using the correct billing type improves claim accuracy, reduces denials, and ensures payer compliance.
Connecticut Medical Billing provides compliant billing solutions for large medical practices and healthcare facilities. Our services improve claim accuracy, ensure correct use of billing codes, and increase revenue cycle efficiency.
Connect us to optimize your institutional billing process and improve reimbursement outcomes.
FAQs
What are the different types of medical billing?
The medical billing system is categorized into three types, namely: (i) Closed system, (ii) Open system, and (iii) Isolated system.
What are the three methods of billing?
There are three types of billing methods: time-based, usage-based, and feature-based
What is level 5 medical billing?
Level 5 is mainly for patients who require complex treatment or who have severe illnesses or critical care diagnoses.