Place of Service Codes: How POS Changes What You Get Paid
Place of Service codes are two-digit codes on professional claims (CMS-1500 item 24B) identifying where a service was rendered. They determine whether Medicare pays the higher non-facility rate or the lower facility rate; for a 2026 99214 that swing is roughly $135.61 versus $84.50 nationally.
- Setting
- Every professional claim, item 24B
- Rate type
- POS decides facility vs non-facility
- Common pairing
- Must match the E/M code family and the facility claim
- Watch out for
- System-wide POS defaults set once and never audited
What are place of service codes?
Place of Service codes are two-digit codes maintained by CMS that go in item 24B of every CMS-1500 professional claim line, telling the payer where the service happened: office, hospital, home, telehealth, nursing facility, and a few dozen other settings. Electronic claims carry the same code in the 837P.
They look like administrative trivia. They are pricing instructions. The POS code is one of the few claim fields that changes the allowed amount for the identical CPT code, which makes it worth more attention than it gets. For the complete two-digit list, use our Place of Service reference table; this entry and the linked deep dives cover how each common code behaves in the wild.
How do facility and non-facility rates work?
Medicare values most Physician Fee Schedule codes twice. The non-facility rate includes full practice expense RVUs, paying you for the exam room, the MA, the supplies. The facility rate assumes an institution is billing separately for all that and pays you mostly work and malpractice. The 2026 conversion factor then turns RVUs into dollars.
Concrete 2026 example: a 99214 averages about $135.61 at the non-facility rate and roughly $84.50 at the facility rate nationally, a spread of about $51 on one visit. Your POS code picks which side of that spread you get. The same mechanics drive the telehealth pay gap between POS 02 (facility rate) and POS 10 (non-facility rate). Price your own code mix both ways with the Medicare fee calculator.
Which POS codes matter most?
Seventeen codes cover nearly all professional billing. Each links to a full entry:
- Telehealth: POS 02 (not at home, facility rate) vs POS 10 (at home, non-facility rate), the highest-stakes pair in the set.
- Office and clinic: POS 11 (office), POS 20 (urgent care), POS 49 (independent clinic), POS 50 (FQHC).
- Hospital: POS 21 (inpatient), POS 22 (on-campus outpatient), POS 19 (off-campus outpatient), POS 23 (ER).
- Surgery and post-acute: POS 24 (ASC), POS 31 (SNF Part A) vs POS 32 (nursing facility), another status-driven pair.
- Home and niche settings: POS 12 (home visits), POS 60 (mass immunization), POS 65 (dialysis), POS 81 (independent lab).
What are the most common POS errors?
Three patterns account for most POS damage, and only one of them denies:
- CARC 5 mismatches: CPT family and POS disagree (office codes at POS 21, ED codes without POS 23). These at least announce themselves on the remit; decode them in the denial code lookup.
- Silent underpayment: facility-rate POS on claims that earned the non-facility rate, classically home telehealth defaulted to POS 02. Pays every time, just short.
- Silent overpayment: non-facility POS from provider-based or institutional settings, classically POS 11 from a hospital-owned clinic. Pays every time, until the audit, and then the 60-day overpayment rule starts the clock on returning it.
Status-driven pairs (21 vs 22 for admission status, 31 vs 32 for Part A coverage) deserve their own workflow, because the correct code changes from day to day for the same patient in the same bed. If your denial and underpayment pattern suggests systemic POS problems, a free billing audit is the fastest way to size the leak.
Frequently asked questions
The Medicare Physician Fee Schedule values each code twice. The non-facility rate includes full practice expense RVUs because the billing provider pays for the space, staff, and supplies. The facility rate strips most practice expense out because a hospital, ASC, or SNF is billing separately for that overhead. Work and malpractice RVUs are identical; the entire difference is who bears the overhead.
The main facility-rate settings are POS 02 (telehealth other than home), 19 and 22 (outpatient hospital), 21 (inpatient), 23 (ER), 24 (ASC), 26, 31 (SNF Part A), 34, 41-42, 51-53, 56, and 61. Most everything else, including 10, 11, 12, 20, 32, 49, and 60, pays non-facility. When in doubt, check the CMS POS database, which flags each code F or NF.
For a mid-level E/M in 2026, roughly $51 per visit (99214 at about $135.61 non-facility versus $84.50 facility, national averages). Multiply by daily volume: a provider seeing 20 patients a day with the wrong default POS misprices six figures a year. Underbilling is silent lost revenue; overbilling is an overpayment you owe back under the 60-day rule.
Yes, payers run place-of-service edits pairing code families with allowed settings: ED codes want POS 23, inpatient codes want POS 21, home visit codes want POS 12, office codes reject institutional POS. Mismatches return CARC 5 (procedure inconsistent with place of service). The claim also has to agree with any facility claim for the same encounter, or both sides pend.
Sources & further reading
Reviewed by the ImmediCare Solutions RCM team
Certified billers and coders handling claims across 50+ specialties nationwide. This entry is reviewed against current payer policy and CMS rules. Last review: Jul 5, 2026.
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