Reviewed by Hassan Raza Awan, Founder — 4+ years of hands-on U.S. medical billing experience. General billing information — verify against current CMS guidance and your payer contracts.
The two-digit POS code on every professional claim tells the payer WHERE the service happened — and where decides how much you're paid. Office settings draw the higher non-facility rate because your practice carries the overhead; facility settings draw lower professional rates because the facility bills its own fee. That makes POS codes a payment variable, a compliance surface (billing office rates for facility services is a textbook overpayment finding), and — since telehealth split into POS 02 and 10 — a moving target that changed more in the last few years than in the previous twenty.
These guides cover the POS codes practices actually use, one page each: what the code identifies, when to use it and when not to, how it changes payment, and the errors payers audit for. More codes are added regularly — and if you're fighting the denials that POS errors cause, our denial code library picks up where these leave off.
POS 11 identifies services performed in a physician's office — a location owned or rented by the practice, not part of a hospital campus. It…
POS 02 identifies telehealth services delivered to a patient who is NOT at home — they're at a clinic, facility, school, or other site while…
POS 10 identifies telehealth services delivered while the patient is in their own home — the code that separated home telehealth from POS 02…
POS 12 identifies services delivered in person at the patient's private residence — house calls, home-based primary care, and many home heal…
POS 19 identifies hospital outpatient department services at a location AWAY from the main hospital campus — the provider-based clinics hosp…
POS 21 identifies services delivered to admitted hospital inpatients. Simple in concept — but the inpatient/observation line it shares with …
POS 22 identifies hospital outpatient services on the main campus — observation stays, hospital clinics, outpatient surgery in the hospital'…
POS 23 identifies services in a hospital emergency department. ER professional billing carries its own E/M family, EMTALA context, and out-o…
POS 24 identifies procedures performed in a Medicare-certified ambulatory surgical center — the freestanding surgery centers where a growing…
POS 31 identifies physician services to patients in a skilled nursing facility during a Medicare Part A covered stay. The Part A detail matt…
POS 32 identifies physician services to nursing facility residents NOT in a Medicare Part A skilled stay — the long-term custodial populatio…
POS 20 identifies urgent care facility services — distinct from the office and the ER. It drives commercial case rates and the member's urgent care co…
POS 49 is the catch-all for freestanding clinics that aren't offices, hospital departments, or specially designated centers. Defined by exclusion — an…
POS 50 identifies FQHC services paid under encounter-based PPS rather than the fee schedule — G-codes, same-day encounter rules, and the errors that b…
Freestanding lab services — send-out specimen rules, who bills reference-lab tests, Medicare anti-markup restrictions, and the errors that trigger CO-16…
Hospice facility vs home hospice, the GV/GW modifiers every attending needs, and the CO-B9 denial after a missed hospice election…
Dialysis billing — the facility bundle, the nephrologist monthly capitation tiers, and the 30-month coordination trap…
CMHC place of service — why it pays the facility rate, and how it differs from POS 11, 52 and telehealth…
IRF billing — the 3-hour intensity rule, who bills what, and the bundling traps between facility and professional claims…
The all-inclusive-rate world — qualifying visits, same-day exceptions, carve-outs, and the silent underbilling leak…
More POS codes are added regularly. Need the full official list? CMS maintains the complete Place of Service code set — these guides cover the ones that decide real money in daily billing.
Not sure this is the right code? Use the POS decision tree — two questions, and it shows the facility vs non-facility pay impact.
Reviewed by Hassan Raza Awan, Founder — 4+ years of hands-on U.S. medical billing experience. General billing information — verify against current CMS guidance and your payer contracts.
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