Place of Service (POS) in medical billing is one of the most crucial yet overlooked elements of the process. Every medical claim requires precise details regarding the procedure, what it includes, and why it was medically necessary. However, the location where the service was provided is equally important for claim processing and reimbursement.
As the name suggests, a POS code identifies the setting where healthcare services were furnished to a patient. Typically, it is a two-digit numeric code and a mandatory field within the CMS-1500 claim form.
The reported place of service can directly affect reimbursement and claim adjudication. Generally, patients can receive services through/at:
- Telehealth
- Physician’s office
- Patient’s home
- Emergency room
- Skilled nursing facility
Missing or incorrect POS information may result in claim rejection, denial, payment errors, or post-payment review. The reason? Centers for Medicare & Medicaid Services (CMS) Claims Processing Manual (Chapter 26) explains a missing or incorrect 24B entry as an unprocessable claim.
Understanding Place of Service Codes or POS in Medical Billing
CMS maintains codes to indicate a particular care setting where a patient receives services. These codes are reported in field 24B of the CMS-1500 form and are used for:
- Reimbursement determination
- Claim processing and adjudication
- Verification that the reported service is consistent with the care setting
What Types of POS Codes Are There?
For Medicare reimbursement purposes, POS codes are grouped under facility and non-facility settings. This distinction affects a provider’s or practice’s reimbursement under the Medicare Physician Fee Schedule (MPFS).
List of Common Place of Service Codes
CMS currently has 99 POS codes for medical billing. While covering all of them can be confusing, we will discuss the most reported ones.
The following codes may be reported when submitting claims for covered healthcare services.
| Category | POS Code | Setting |
|---|---|---|
| Facility (Hospital & Institutional Settings) | 20 | Urgent Care Facility |
| 21 | Inpatient Hospital | |
| 22 | On-Campus Outpatient Hospital | |
| 23 | Emergency Room Hospital | |
| 24 | Ambulatory Surgical Center (ASC) | |
| 31 | Skilled Nursing Facility (SNF) | |
| Non- Facility (Office & Community Settings) | 03 | School |
| 11 | Physician office | |
| 12 | Patient’s Home | |
| 49 | Independent Clinic | |
| Telehealth & Virtual Care | 02 | Telehealth (Other than Home) |
| 10 | Telehealth (Patient’s Home) |
Impact of POS Codes on Healthcare Reimbursement
POS coding directly affects reimbursement and can create significant billing risks when done incorrectly. These may include:
Financial Risk
The financial risks of incorrectly reporting these codes can be serious from a billing perspective. According to the MPFS, codes reported for facility and non-facility settings have different practice expense Relative Value Units (RVUs).
As a result, the same CPT code may be reimbursed differently depending on whether it was reported for a facility or a non-facility setting. Reporting an incorrect POS code in medical billing may result in underpayments, overpayments, denials, or post-payment adjustments.
Denials and Resubmissions
As mentioned before, accurately reporting care setting details is necessary for smooth reimbursement. However, if a practice’s billing team makes errors, it can delay the reimbursement. When a coding error is identified, staff must investigate the cause before resubmitting the claim.
If the error is genuine, the code must be corrected before resubmitting the claim to the payer. Similarly, if an incorrect code results in overpayment, the claim may require adjustment and refund procedures.
These corrective actions consume staff time and resources that could otherwise be devoted to patient care and revenue cycle activities.
Audit and Compliance Risk
If the place of service mentioned in the supporting documents and the medical claim do not match, it can create an issue. Why? The payer will be unable to determine the exact reimbursement rate based on the facility and non-facility fee schedules. Also, if an auditor identifies similar errors over time, the credibility of your practice may be at stake.
Incorrect reporting of these codes may raise the question of whether or not the clinical care provided to the patient was appropriate. Therefore, practices must avoid all kinds of billing errors to preserve their reputation.
Operational Visibility
Accurate care setting coding does more than support claim submission; it can also help practices identify operational patterns and recurring billing issues. Reviewing these coding trends can help practices identify training gaps, workflow issues, and recurring billing errors.
For instance, the patterns may indicate that persistent setting-related coding errors are due to a lack of training. If the in-house team isn’t trained on the latest coding standards, the likelihood of errors increases drastically.
Common POS Coding Errors
Misreported locations where services were provided may cause more challenges than imagined. These coding errors vary depending on the situation, as discussed below:
Reporting Code 11 for All Claims
If practices use code 11 even when providers see patients in a hospital outpatient department, it is a clear error because 11 does not apply to it. Services provided in such locations should be reported with code 22 and not 11.
If the billing team does not update the care setting correctly, the claim may be at risk of:
- Incorrect reimbursement
- Recurring claim errors
- Compliance concerns
Misusing Codes 02 and 10
The requirements for telehealth services are payer-specific, based on which POS codes are appended. According to the telehealth billing and coding guide, payers can be billed for telehealth services rendered at the patient’s home using code 10.
So, if the billing team uses an incorrect telehealth setting code, it leads to additional rework and administrative strain for the team.
Misclassifying SNF vs. Nursing Facility
Services rendered in a Skilled Nursing Facility (SNF) are reported with 31, whereas code 32 is reported for a nursing facility. Unfortunately, inexperienced or new billing teams may confuse the two, leading to incorrect reimbursement.
CPT and POS Mismatch
If the documented care setting and CPT codes do not align, the claim may be flagged for review. Moreover, if such incidents occur repeatedly, a comprehensive audit may be necessary, risking the practice’s reputation.
Missing or Invalid Box 24B
As mentioned earlier, Box 24B on the CMS-1500 claim form is reserved for the place of service code. It is a mandatory field and can lead to a claim rejection if left incomplete or invalid.
Best Practices for Using POS Codes
While POS coding errors are typically a serious concern, adopting the right practices can mitigate these errors.
The following are some of the best practices for using these codes to avoid billing mistakes:
- Always review the documented service location before applying a care setting code on the claim.
- Ensure all provider and facility records are updated for precise code reporting.
- Refer to payer-specific telehealth billing requirements, as the coding and billing rules differ among insurers.
- Always record and document the patient’s location during telehealth for accurate code usage.
- Employ billing software or third-party services that review care setting codes and missing claim information before submission.
- Perform regular claim audits to detect and correct recurring coding errors.
- Review claim rejection and denial reports regularly to identify recurring coding and billing errors.
- Provide billing staff with proper guidance and training on the facility and non-facility setting reporting and coding.
- Monitor CMS’s coding updates and payer policy changes to maintain billing compliance.
The Takeaway
POS codes in medical billing are two-digit numeric identifiers used to indicate the setting where healthcare services were furnished. For reimbursement purposes, these codes are categorized into facility and non-facility settings, although separate codes also exist for telehealth and other specialized care environments.
Practices must always have a concrete action plan to report the care setting in medical billing. It requires steering clear of common errors and following the best practices mentioned in this article.
However, if your in-house team still struggles to bill payers properly, you should consider third-party service providers. NeuraBill’s medical billing and coding services ensure that accuracy is an ongoing operational priority.
