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Place of Service (POS) Codes

The full CMS POS code set, with each code's Medicare facility vs. non-facility pay rate. Search by code, name, or setting (e.g., 11, office, telehealth).

What POS codes are

A Place of Service code is the two-digit value on a professional claim (CMS-1500 box 24B / 837P) that tells the payer where a service happened. Medicare uses it to pay each service at either the facility or non-facility rate. Non-facility (e.g., office) rates are higher because the practice absorbs overhead; facility rates are lower because the hospital bills separately for it. Getting the POS wrong is a leading cause of denials and audit take-backs.

Reference only — paraphrased from the CMS code set. Confirm verbatim text and current status at cms.gov before billing.

01
Pharmacy
A site where medications and related items are dispensed or sold directly to patients.
Eff. 10/1/2003; rev. 10/1/2005
Non-facility
02
Telehealth (patient not at home)
Care delivered via telecommunications when the patient is somewhere other than their home.
Eff. 1/1/2017; revised 1/1/2022. Use modifier 95 (audio-video) or 93 (audio-only)
Facility
03
School
A location whose main function is education.
Eff. 1/1/2003
Non-facility
04
Homeless Shelter
A site providing temporary housing to people experiencing homelessness.
Eff. 1/1/2003
Non-facility
05
IHS Free-standing Facility
An Indian Health Service outpatient facility for patients who don't need hospitalization.
Not used by Medicare — returned as unprocessable
Special
06
IHS Provider-based Facility
An IHS facility providing inpatient/outpatient care under physician supervision.
Not used by Medicare — returned as unprocessable
Special
07
Tribal 638 Free-standing Facility
A tribally-owned (638) outpatient facility for members who don't need hospitalization.
Not used by Medicare — returned as unprocessable
Special
08
Tribal 638 Provider-based Facility
A tribally-owned (638) facility providing inpatient/outpatient care.
Not used by Medicare — returned as unprocessable
Special
09
Prison / Correctional Facility
A jail, prison, or other correctional setting.
Eff. 7/1/2006; Medicare generally won't pay for care here
Non-facility
10
Telehealth (patient at home)
Care delivered via telecommunications while the patient is in their private residence.
Eff. 1/1/2022 (Medicare 4/1/2022); paid non-facility from 1/1/2024. Use modifier 95 or 93
Non-facility
11
Office
A non-hospital ambulatory setting where a provider routinely examines and treats patients.
Long-standing
Non-facility
12
Home
A private residence where the patient receives care.
Long-standing
Non-facility
13
Assisted Living Facility
A residential facility with self-contained units offering 24/7 support and some health services.
Eff. 10/1/2003
Non-facility
14
Group Home
A shared residence where clients get supervision plus support such as medication help.
Eff. 10/1/2003; rev. 4/1/2004
Non-facility
15
Mobile Unit
A traveling unit equipped for screening, diagnostic, and/or treatment services.
Eff. 1/1/2003
Non-facility
16
Temporary Lodging
Short-term lodging (hotel, hostel, campground, cruise ship, resort) not covered by another code.
Eff. 1/1/2008
Non-facility
17
Walk-in Retail Health Clinic
A walk-in clinic inside a retail store providing basic preventive/primary care.
Eff. 5/1/2010
Non-facility
18
Place of Employment / Worksite
A worksite where a provider delivers occupational health, therapy, or rehab to employees.
Eff. 1/1/2013; not enumerated in §20.4.2 (pay rate not defined there)
Special
19
Off-Campus Outpatient Hospital
An off-campus hospital provider-based department serving outpatients.
Eff. 1/1/2016
Facility
20
Urgent Care Facility
A clinic (distinct from an ER) treating walk-in patients needing immediate, unscheduled care.
Eff. 1/1/2003
Non-facility
21
Inpatient Hospital
A non-psychiatric hospital treating admitted inpatients.
Long-standing. Facility rate paid regardless of where the encounter occurred
Facility
22
On-Campus Outpatient Hospital
A hospital main-campus department serving outpatients.
Description revised 1/1/2016
Facility
23
Emergency Room – Hospital
The hospital area providing emergency diagnosis and treatment.
Long-standing
Facility
24
Ambulatory Surgical Center
A free-standing facility (not a physician office) performing outpatient surgery/diagnostics.
Long-standing
Facility
25
Birthing Center
A facility for labor, delivery, postpartum, and newborn care outside a hospital/office.
Long-standing
Non-facility
26
Military Treatment Facility
A medical facility run by the uniformed services.
Long-standing
Facility
27
Outreach Site / Street
A non-permanent street location serving unsheltered homeless individuals.
Eff. 10/1/2023
Non-facility
31
Skilled Nursing Facility
A facility providing inpatient skilled nursing/rehab below the hospital level of care.
For Part A residents
Facility
32
Nursing Facility
A facility providing skilled nursing or above-custodial care.
Part B residents
Non-facility
33
Custodial Care Facility
A facility providing room, board, and personal assistance with no medical component.
Long-standing
Non-facility
34
Hospice
A facility (not the patient's home) providing palliative care to the terminally ill.
For inpatient hospice care
Facility
41
Ambulance – Land
A ground vehicle staffed/equipped for lifesaving transport.
Long-standing
Facility
42
Ambulance – Air or Water
An air/water vehicle staffed/equipped for lifesaving transport.
Long-standing
Facility
49
Independent Clinic
A non-hospital clinic providing outpatient-only preventive/diagnostic/therapeutic care.
Eff. 10/1/2023
Non-facility
50
Federally Qualified Health Center
A facility in an underserved area providing preventive primary care under physician direction.
Long-standing
Non-facility
51
Inpatient Psychiatric Facility
A facility providing 24-hour inpatient psychiatric care under physician supervision.
Long-standing
Facility
52
Psychiatric Facility – Partial Hospitalization
A facility offering structured mental-health treatment short of full-time hospitalization.
Long-standing
Facility
53
Community Mental Health Center
A center offering outpatient, emergency, day-treatment, and screening mental-health services.
Long-standing
Facility
54
ICF / Individuals with Intellectual Disabilities
A facility providing above-custodial health-related care for people with intellectual disabilities.
Long-standing
Non-facility
55
Residential Substance Abuse Treatment Facility
A live-in facility treating alcohol/drug abuse without acute medical care.
Long-standing
Non-facility
56
Psychiatric Residential Treatment Center
A 24-hour staffed psychiatric facility with a therapeutic group-living environment.
Long-standing
Facility
57
Non-residential Substance Abuse Treatment Facility
An ambulatory facility treating alcohol/drug abuse (therapy, counseling, testing).
Eff. 10/1/2023
Non-facility
58
Non-residential Opioid Treatment Facility
An ambulatory facility treating opioid use disorder (methadone/MAT).
Eff. 1/1/2020
Non-facility
60
Mass Immunization Center
A site administering vaccines via roster billing (public health center, pharmacy, mall).
Long-standing
Non-facility
61
Comprehensive Inpatient Rehabilitation Facility
A facility providing physician-supervised inpatient rehab (PT/OT/speech).
Long-standing
Facility
62
Comprehensive Outpatient Rehabilitation Facility
A facility providing physician-supervised outpatient rehab services.
CORF services always paid non-facility
Non-facility
65
End-Stage Renal Disease Treatment Facility
A non-hospital facility providing dialysis treatment/training.
Long-standing
Non-facility
66
PACE Center
A facility delivering comprehensive PACE medical/social services.
Eff. 8/1/2024 (newest code). Medicaid-only — Medicare denies
Special
71
Public Health Clinic
A state/local health-department facility providing ambulatory primary care.
Long-standing
Non-facility
72
Rural Health Clinic
A certified clinic in a rural underserved area providing ambulatory primary care.
Long-standing
Non-facility
81
Independent Laboratory
A lab certified to run diagnostic/clinical tests independent of a hospital or office.
Long-standing
Non-facility
99
Other Place of Service
Any setting not described by another POS code.
Long-standing
Non-facility
28–30
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
35–40
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
43–48
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
59
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
63–64
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
67–70
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
73–80
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
82–98
Unassigned
Reserved by CMS — do not use; submitting one triggers rejection.
No codes match your search.

Facility vs. non-facility — the enumerated lists

Facility-rate codes: 02, 19, 21, 22, 23, 24, 26, 31, 34, 41, 42, 51, 52, 53, 56, 61.

Non-facility-rate codes: 01, 03, 04, 09, 10, 11, 12, 13, 14, 15, 16, 17, 20, 25, 27, 32, 33, 49, 50, 54, 55, 57, 58, 60, 62, 65, 71, 72, 81, 99.

Key exception: for a service to a patient who is an inpatient (POS 21) or hospital outpatient (POS 19 or 22), the facility rate is paid regardless of where the face-to-face encounter occurred.

Telehealth: POS 02 vs 10

POS 02 = patient not at home (facility rate). POS 10 = patient at home (non-facility rate, payable since 1/1/2024). Pair both with modifier 95 (audio-video) or modifier 93 (audio-only).

Caution: the codes are permanent, but Medicare coverage of home telehealth depends on federal statutory flexibilities that have repeatedly lapsed and been restored (including across 2025–2026). Whether a home-telehealth claim is payable can hinge on the date of service — always verify the current extension status at cms.gov before billing, and flag/hold claims during any lapse.

High-risk confusions to audit

Frequently asked questions

What is a Place of Service (POS) code?
A two-digit code on a professional (CMS-1500 / 837P) claim that tells the payer the setting where a service was provided — e.g., 11 for office, 21 for inpatient hospital. It drives whether Medicare pays the facility or non-facility rate.
What is the difference between POS 11 and POS 22?
POS 11 is a physician office (non-facility rate). POS 22 is an on-campus hospital outpatient department (facility rate). Using the wrong one is a common cause of over- or under-payment and audit take-backs.
What is the difference between POS 02 and POS 10 for telehealth?
POS 02 is telehealth when the patient is NOT at home (paid at the facility rate). POS 10 is telehealth when the patient IS at home (paid at the higher non-facility rate). Pair both with modifier 95 (audio-video) or 93 (audio-only).
Which POS codes are facility vs. non-facility?
Facility-rate codes include 02, 19, 21, 22, 23, 24, 26, 31, 34, 41, 42, 51, 52, 53, 56, 61. Most others (01, 03, 04, 09, 10, 11, 12, 49, 50, 62, 65, 72, 81, 99, etc.) are non-facility. Facility rates are lower because the facility bills separately for overhead.
Is POS 66 (PACE) payable by Medicare?
No. POS 66 (PACE Center, added Aug 1, 2024) is a Medicaid-only code; Medicare denies claims that use it. The IHS/Tribal codes 05–08 are also not used by Medicare.
How many POS codes are there?
The set runs 01–99 with roughly 40 active codes; the rest are reserved/unassigned ranges. The highest active code is 99 (Other) and the newest is 66 (PACE).

See also: denial codes lookup (CARC & RARC) · the CMS-1500 explained · glossary.

Source: CMS Place of Service Code Set (cms.gov/medicare/coding-billing/place-of-service-codes); facility/non-facility designations from the Medicare Claims Processing Manual, Pub. 100-04, Ch. 12, §20.4.2. Descriptions paraphrased. Last reviewed June 2026 — re-verify against cms.gov, as POS values and telehealth rules change periodically.