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Medical Coding (ICD-10, CPT, & Modifiers)
Plain-English guides to ICD-10, CPT and HCPCS coding, modifiers, and the payer rules that decide whether a claim pays. Written for practice managers, coders and billers.
102 guides
Knee Pain ICD-10 Codes: M25.561, M25.562 and M25.569 Explained
Knee pain ICD-10 codes come from M25.56-. Learn which code fits the right, left, both or unstated knee, and when a confirmed diagnosis replaces the symptom code.
Flu Vaccine CPT Codes and Billing: 2026-2027 Season Guide
Which flu vaccine CPT codes to bill this season, what is new (including an mRNA code), and how Medicare Part B pays. Checked against CDC, CMS and AMA sources in...
Inpatient Coding vs Outpatient Coding: Code Sets and Payment
Inpatient coding and outpatient coding use different code sets, different claims and different payment systems. Here is how they differ and where the two-midnight rule fits.
ICD-10 Code for Skin Tags: L91.8, CPT 11200 and Coverage
The ICD-10 code for skin tags, the CPT codes for removal, and how Medicare and payers decide whether removal is cosmetic or medically necessary.
Jaundice ICD-10 Code: R17, E80 and Newborn P Codes
Which jaundice ICD-10 code is right? A plain guide to R17, newborn P55-P59 codes, E80 bilirubin codes and the liver codes often mixed up with them.
Acute Bronchitis ICD-10 Code J20.9: When to Use It
Acute bronchitis ICD-10 coding for FY2027: when J20.9 is right, when the organism codes J20.0-J20.8 apply, and how J40 and J44.0 change the claim.
How to Ensure Accurate CPT Coding and Modifiers in Wound Care
Discover essential CPT coding practices for wound care to ensure accurate billing and maximize reimbursements.
GV and GW Modifiers for Hospice Patients: When to Use Each
GV and GW modifiers tell Medicare whether a Part B service for a hospice patient is the attending physician's related care or an unrelated service. Here is how to pick...
HCPCS vs CPT: Level I, Level II and Who Maintains Each
CPT is HCPCS Level I; Level II is a separate CMS code set for drugs, supplies, equipment and ambulance. Here is who maintains each and when to use which.
Critical Care Billing: CPT 99291, 99292 and Time Rules
How critical care billing works for CPT 99291 and 99292: the 30 and 104 minute marks, bundled services, modifiers and Medicare's split or shared rules.
Chiropractic CPT Codes and Modifiers: 98940-98942, AT and 25
A practical reference to chiropractic CPT codes and modifiers: how regions set the CMT code, when AT, GA, GZ and 25 apply, and what notes support them.
Enhancing Collections in Podiatry: The Importance of Using Appropriate Modifiers
Discover how to enhance podiatry collections using appropriate modifiers for better reimbursement and reduced claim denials.
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