Billing & Coding
4 tools · 10 guides · 14 pages
CPT units, timed-code arithmetic, chiropractic manipulation codes and the superbill a cash patient actually needs.
Two arithmetics live on this shelf and they never mix. Physical therapy bills most of its procedures in timed 15-minute units, so the minutes in the note decide the claim; start with the units calculator and the single-code guides such as 97110 and 97116. Chiropractic manipulation is billed per visit by the number of spinal regions treated, which is a counting problem rather than a clock problem; the chiropractic billing guide covers the region count and the AT modifier.
Everything else here sits between those two: which codes are untimed, which modalities Medicare bundles (see the modality code guide), when a range-of-motion measurement is separately billable, and what the KX modifier attests once a patient passes the annual therapy threshold. Descriptions of CPT codes are our own paraphrase; the official descriptors belong to the AMA.
Tools
Physical therapy billing units calculator
Turn treatment minutes into billable units under the 8-minute rule.
Open the toolBillingPhysical therapy CPT code lookup
Search the outpatient physical therapy CPT set with timed/untimed flags.
Open the toolBillingChiropractic CPT code lookup
The CMT codes, their spinal-region counts and the modifiers that go with them.
Open the toolBillingSuperbill generator
Build a printable superbill a cash patient can submit for reimbursement.
Open the toolGuides
CPT 97110: therapeutic exercise
What 97110 covers, how the units are counted and what documentation must say.
8 min read
BillingCPT 97530: therapeutic activities
How 97530 differs from 97110, and when payers expect one over the other.
7 min read
BillingCPT 97140: manual therapy
Manual therapy billing, the 59/XS modifier question and the region rules.
8 min read
BillingCPT 97112: neuromuscular re-education
Balance, proprioception and coordination work: what earns 97112.
7 min read
BillingPhysical therapy evaluation CPT codes
97161-97163 complexity tiers and 97164 re-evaluation, decided by the elements.
9 min read
BillingChiropractic billing codes
98940-98943, the spinal-region count, exam codes and the AT modifier.
9 min read
BillingCPT 97116: gait training
Timed units, the skilled gait note, and where 97116 ends and 97530 or 97112 begin.
9 min read
BillingCPT 95851: range of motion measurements
When ROM measurement bills: the NCCI edits, untimed per-region units and the 3-unit MUE.
8 min read
BillingPhysical therapy modality CPT codes
Supervised vs timed modalities, 97010 bundling, G0283 vs 97014, 97039 and 97113.
10 min read
BillingKX modifier in physical therapy
The 2026 KX threshold, GP/GO/GN pairing, and when an ABN and GA apply instead.
10 min read
