Specialties
The rule that keeps denying your claims
Every specialty has one or two rules that generate most of its denials. These guides explain what each rule actually says, why claims fall foul of it, and what documentation turns the denial around.
- Physical therapyTwo Medicare rules drive most PT denials: how timed treatment converts into billable units, and what happens once a patient crosses the annual therapy threshold.
- ChiropracticMedicare covers exactly one chiropractic service, and the line between active treatment and maintenance care decides whether it gets paid.
- Behavioral healthSession limits and concurrent review drive most behavioral health denials — and federal parity law gives you an argument that has nothing to do with coding.
- DermatologyMost dermatology denials come down to two documentation questions — whether the record establishes the procedure was medical rather than cosmetic, and whether a same-day visit stands on its own.
These guides do not give coding advice
They explain the published rules, why denials fire under them, and what documentation supports an appeal. They will not tell you which CPT code, unit count, or modifier to bill — those are your coder’s determinations against the record and the payer’s policy, and anyone confidently telling you otherwise on the internet is taking a risk with your practice, not theirs.
Same three minutes, whatever you practice
Upload the denial. Undeny reads the code, drafts the appeal letter, and tracks the deadline until the money comes back.