POS 11 is the place of service code for Office — a non-hospital setting where a physician or practitioner routinely provides outpatient evaluation, diagnosis, and treatment.
It is an outpatient code (not inpatient) and one of the most frequently used POS codes on professional claims submitted to Medicare and commercial payers.
POS 11 is not just a label that goes on the claim — it directly determines how much the provider gets paid. The same CPT code billed with POS 11 (office) reimburses at the non-facility rate, which is typically higher than the facility rate applied when the same service is billed under POS 22 (hospital outpatient).
The difference exists because the non-facility rate includes practice expense overhead that the physician’s office absorbs. In this read, we’ll be going through:
- Why POS 11 pays more than POS 22 for the same service
- Which services belong under POS 11 and which do not
- How POS 11 compares to other commonly used POS codes
- Errors that trigger POS-related denials and audits
- Why telehealth services should not use POS 11
Is POS 11 inpatient or outpatient?
POS 11 is strictly outpatient. It identifies a physician’s office — a non-hospital ambulatory setting. Inpatient hospital services use POS 21.
Outpatient hospital department services use POS 22. POS 11 applies only when the care is delivered in the physician’s own office or clinic (not a hospital-owned facility, not a skilled nursing facility, not a telehealth encounter).
The “inpatient or outpatient” question appears frequently because billing staff encounter POS 11 as a default value in many practice management systems and need to confirm whether it is appropriate for the encounter. The short answer is always outpatient — if the patient was admitted to a hospital, POS 11 is wrong.
Why does POS 11 affect how much a provider gets paid?
The Medicare Physician Fee Schedule (MPFS) calculates reimbursement using two payment tracks for most CPT codes — a non-facility rate and a facility rate. Which track applies depends entirely on the POS code on the claim.
1. Non-facility rate (POS 11)
In this case, the provider’s office bears the full overhead of delivering the service.
Rent, staff, equipment, supplies, and utilities are all included in the practice expense component of the RVU calculation.
The total reimbursement is higher because Medicare is paying for both the professional work and the practice expense.
2. Facility rate (POS 22)
In this case, the hospital bears the overhead.
The physician submits the professional claim at a lower rate (reduced practice expense RVU), and the hospital separately bills a facility fee.
The physician’s share is smaller, but the hospital collects additional reimbursement through its own claim.
Financial consequence
For many evaluation and management (E/M) and procedural codes, the non-facility rate under POS 11 can be significantly higher than the facility rate under POS 22.
Billing POS 22 when the service was actually performed in the physician’s office leaves money on the table. Billing POS 11 when the service was performed in a hospital outpatient department creates audit exposure and potential recoupment.
Which services belong under POS 11?
POS 11 applies to any service delivered in a physician’s or practitioner’s office that is not part of a hospital outpatient department. The most common clinical encounters billed with POS 11 include the following.
- Chronic care management visits
- Immunizations and vaccine administration
- Preventive care visits and wellness exams
- E/M office visits (new and established patients)
- Specialist consultations conducted in the physician’s office
- In-office diagnostic testing (EKG, spirometry, point-of-care lab)
- Minor in-office procedures (injections, lesion excision, wound care)
The key qualification is the setting, not the service. A spirometry test billed with POS 11 in a physician’s office and the same spirometry billed with POS 22 in a hospital outpatient department reimburse at different rates — even though the clinical service is identical.
How does POS 11 compare to other place of service codes?
Billing teams encounter several POS codes regularly, and confusing them is one of the most common reasons claims deny or reimburse incorrectly. The table below compares POS 11 to the codes it is most frequently confused with.
| POS | Setting | Inpatient or outpatient | Payment track | Key rule |
| 11 | Physician office | Outpatient | Non-facility (higher) | Provider bears overhead |
| 22 | Hospital outpatient department (on-campus) | Outpatient | Facility (lower) | Hospital bills facility fee separately |
| 19 | Hospital outpatient department (off-campus) | Outpatient | Facility (lower) | Same split billing as POS 22 |
| 21 | Inpatient hospital | Inpatient | Facility (lower) | Requires admission |
| 02 | Telehealth (not at patient’s home) | Outpatient | Varies by payer | Post-PHE telehealth code |
| 10 | Telehealth (patient at home) | Outpatient | Varies by payer | Home-based virtual visit |
| 24 | Ambulatory surgical center | Outpatient | Facility (lower) | ASC-specific reimbursement |
| 31 | Skilled nursing facility | Outpatient/inpatient varies | Varies | SNF billing rules apply |
While many POS codes affect claims processing, reimbursement differences are most noticeable when comparing physician offices and hospital outpatient departments.
The same CPT code can pay differently depending on whether the service is reported under a non-facility setting (POS 11) or a facility setting (POS 22), making these two codes among the most important for revenue-cycle teams to understand.
Financial impact
Same CPT code, different POS, different payment
The POS code determines which reimbursement track applies — not the procedure itself.
Why should telehealth encounters not use POS 11?
After CMS telehealth policy updates (effective post-Public Health Emergency), place of service codes for virtual care are now separate from in-person office codes. POS 11 identifies in-person office-based care. Telehealth encounters use different POS codes.
- POS 02 — telehealth services provided to a patient at a location other than their home
- POS 10 — telehealth services provided to a patient at home
Billing a telehealth visit with POS 11 tells the payer the encounter happened in the physician’s office — which contradicts the telehealth platform documentation showing a virtual interaction.
The mismatch creates a denial risk (typically CO-16 or CO-109) and, if the claim is paid anyway, creates audit exposure because the documentation does not support an in-person office visit.
Some legacy billing systems default every encounter to POS 11, including telehealth visits that were scheduled through a virtual platform.
Billing teams that do not override the default for telehealth encounters submit incorrect POS codes on every virtual visit — a systemic error that compounds across claims.
What POS 11 errors cause denials?
POS-related denials are not coding errors in the traditional sense (the CPT and ICD-10 codes may be correct). They are setting classification errors — the claim accurately describes what was done but misrepresents where it was done.
Hospital-based services coded as office
When a physician employed by a hospital provides services in a hospital outpatient department but the claim is submitted with POS 11 instead of POS 22, the payer reimburses at the non-facility rate.
If audited, the documentation shows a hospital-based encounter — and the provider faces recoupment for the payment differential between non-facility and facility rates.
Hospital-employed physicians practicing in hospital-owned clinics are the highest-risk population for this error because the clinical setting looks like a private office but is legally classified as a hospital outpatient department.
Telehealth billed as in-person
Covered in the section above — POS 11 on a telehealth claim produces a setting mismatch that triggers denial or audit.
Default POS not updated per encounter
Practice management systems that default POS 11 on every encounter require manual overrides for any visit that occurs outside the physician’s office (hospital rounding, ASC procedures, SNF visits, telehealth). When the override is missed, the claim goes out with an incorrect POS — and the denial or audit follows.
Documentation does not support office setting
Even when POS 11 is clinically correct, the encounter note must reflect an office-based visit. An audit that finds a POS 11 claim with documentation referencing a hospital department, outpatient surgery center, or virtual platform flags the claim for recoupment.
How does POS 11 affect what patients pay?
Patient cost-sharing — copays, coinsurance, and deductible application — can differ between facility and non-facility settings.
In some plan designs, patients pay different out-of-pocket amounts depending on where the service was delivered. An office visit under POS 11 may carry a lower copay than the same visit under POS 22, or vice versa depending on the plan structure.
For patients, the POS code on the claim affects their statement.
For front-desk staff collecting copays at check-in, verifying the correct copay amount requires knowing whether the service falls under the plan’s office visit cost-sharing or its facility-based cost-sharing.
Stop losing reimbursement to the wrong place of service
POS 11 is one of the simplest codes in medical billing — and one of the most financially consequential when it is applied incorrectly.
Every POS error either leaves money on the table (POS 22 when it should be POS 11) or creates audit exposure (POS 11 when the service was facility-based or virtual).
- Audit POS accuracy quarterly against documentation and scheduling data
- Override POS defaults for telehealth, hospital rounding, ASC, and SNF encounters
- Train front-desk and billing staff on the financial difference between POS 11 and POS 22
- Verify POS on every claim before submission, especially for hospital-employed physicians
Get in touch with MedHeave to add POS validation into your claims workflow — and stop paying for rework on claims that carried the wrong setting code.
Frequently asked questions
Here are some commonly asked questions on this topic:
POS 11 is the place of service code for Office — a non-hospital setting where a physician or practitioner provides outpatient evaluation, diagnosis, and treatment. It is part of the CMS Place of Service Code Set and is required on every CMS-1500 professional claim. POS 11 triggers the non-facility reimbursement rate under the Medicare Physician Fee Schedule, which is typically higher than the facility rate because practice expense overhead is included.
POS 11 is outpatient. It identifies a physician’s office — a non-hospital ambulatory setting. Inpatient hospital services use POS 21. If the patient was admitted to a hospital for an overnight stay or higher level of care, POS 11 is incorrect and POS 21 should be used instead. POS 11 applies only to care delivered in the physician’s own office or independent clinic.
POS 11 (Office) identifies a non-hospital physician office where the provider bears all overhead costs. POS 22 (On-Campus Outpatient Hospital) identifies a hospital-owned outpatient department. For the same CPT code, POS 11 reimburses at the higher non-facility rate, while POS 22 reimburses at the lower facility rate (with the hospital billing a separate facility fee). The distinction is based on ownership and setting, not the type of service performed.
Telehealth encounters use POS 02 (patient at a non-home location) or POS 10 (patient at home). POS 11 should generally not be used for telehealth services because it identifies in-person office-based care. Billing telehealth with POS 11 creates a setting mismatch that triggers denials or audit exposure. Some payers had temporary exceptions during the Public Health Emergency, but current CMS guidance distinguishes telehealth POS codes from in-person office codes.
POS 31 is the code for Skilled Nursing Facility (SNF) — a facility that provides skilled nursing care, rehabilitation services, or other health-related services. It is used when a physician provides services to a patient residing in a SNF. Reimbursement rules for POS 31 differ from POS 11, and SNF-specific billing requirements (including the SNF consolidated billing rules for Medicare Part A patients) apply.
Not automatically. POS 11 triggers the non-facility payment rate, which is typically higher than the facility rate for many CPT codes because practice expense is included. However, actual reimbursement depends on the CPT code, the RVU structure, the geographic practice cost index (GPCI), and the payer’s fee schedule. POS 11 does not increase reimbursement for every service — it determines which payment track applies, and the non-facility track is often (but not always) the higher one.
