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…
Opioid treatment programs — the one place of service that stays the same for telehealth, and why office-based treatment is POS 11.
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…
Day programme at hospital-level intensity — why it pays the facility rate, and how it differs from POS 51 and 53.
Formal admission and 24-hour care — the facility rate, the observation trap, and how it differs from POS 52 and 53.
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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