HCPCS Modifiers

Browse HCPCS modifiers used with Level II billing codes for procedures, supplies, and specialized billing services.

HCPCS Modifiers by Number

91

Repeat Clinical Diagnostic Laboratory Test

Repeat same-day laboratory testing for additional results.

99

Repeat Clinical Diagnostic Laboratory Test

Repeat same-day laboratory testing for additional results.

A

AU

Urological, Ostomy, or Tracheostomy Supply

Items used with urological, ostomy, or tracheostomy supplies

HCPCS Modifiers by Letter

A1

Dressing for One Wound

Identifies dressing supplies for one wound

E1

Upper Left Eyelid

Identifies procedures performed on the patient's upper left eyelid to accurately report the anatomical location.

E

E2

Identifies procedures performed on the patient's lower left eyelid for accurate anatomical billing and claim processing

Lower Left Eyelid

E3

Identifies procedures performed on the patient's upper right eyelid for accurate anatomical billing and documentation

Upper Right Eyelid

E4

Lower Right Eyelid

Identifies procedures performed on the lower right eyelid for accurate billing.

G

GR

VA Resident Service

Identifies VA resident services under supervision

L

LT

Left Side

Used to identify a procedure performed on the left side of the body

R

RT

Right Side

Used to identify a procedure performed on the right side of the body

ModifierLookup

Your trusted source for CPT and HCPCS modifier explanations, billing guidance, and coding resources

Categories

Modifiers

Guides

Resources

Trusted Information

Practical Guidance

Accurate, up-to-date, and compliance-focused modifier guidance

Real-world billing examples and coding insights

Built for Professionals

Designed for coders, billers, and healthcare teams

Evaluation & Management

Billing Guidelines

NCCI Edits Guide

Medicare Guidelines

FAQ

Glossary

Code References

Terms & Conditions

Sitemap