UB04 Type of Bill Code 0181: Hospital Swing Bed - Admit through Discharge Claim

Overview

The UB‑04 Type of Bill (TOB) code is a four‑digit alphanumeric field that conveys three distinct pieces of information: the type of facility, the type of care, and the frequency or sequence of the claim. As explained by Noridian, the first digit is a leading zero that is ignored by CMS, the second digit indicates the type of facility, the third digit the type of care, and the fourth digit the frequency/sequence ^[1]. Code 0181 breaks down as follows: facility digit “1” means Hospital; care digit “7” means Subacute Inpatient/Swing Beds; and frequency digit “1” means Admit Through Discharge ^[1]. Therefore, TOB 0181 represents a claim for a hospital swing bed stay that covers the entire episode from admission through discharge, submitted as a single, complete bill. The MassHealth UB‑04 Billing Guide notes that the UB‑04 claim form is used by acute inpatient hospitals, acute outpatient hospitals, and other hospital‑based providers; all claims must be submitted electronically unless a waiver has been approved ^[2]. This code is specific to hospital swing bed services, which provide subacute inpatient care in a hospital setting.

When to Use

Use TOB 0181 when billing for a hospital swing bed stay that spans the entire period from the patient’s admission to discharge, with no interim claims submitted. According to Noridian, the frequency digit “1” explicitly designates “Admit Through Discharge,” meaning the claim covers the complete episode of care ^[1]. The care digit “7” identifies the service as Subacute Inpatient/Swing Beds, which applies to hospitals that offer swing‑bed services to provide skilled nursing or subacute care under Part A ^[1]. This code should not be used for interim billing (e.g., frequency digit 2, 3, or 4) or for late charge‑only claims (frequency digit 5). Providers must also adhere to the payer’s claim submission requirements; for MassHealth, the UB‑04 Billing Guide mandates that all claims be submitted electronically unless a provider has received an approved waiver for paper submission ^[2]. Therefore, when submitting TOB 0181, ensure that your claim is filed electronically or under a valid waiver and that the patient’s entire swing‑bed stay is captured on a single claim form.

Step-by-Step Claim Example

Because the provided sources do not include a specific step‑by‑step example for TOB 0181, this example follows the general UB‑04 claim submission guidelines from the MassHealth UB‑04 Billing Guide and the code definition from Noridian. Scenario: A patient is admitted to a hospital swing bed on June 1, 2025, and discharged on June 15, 2025. The hospital bills for the entire stay as a single claim. Step 1: Verify that the patient’s stay qualifies as hospital swing‑bed (subacute inpatient) care. Step 2: Complete the UB‑04 claim form, entering “0181” in Field 4 (Type of Bill) ^[1]. Step 3: Fill out all required fields per the payer’s instructions; the MassHealth guide emphasizes that providers must use the UB‑04 form and submit claims electronically unless a waiver was granted ^[2]. Step 4: Ensure the claim includes from and through dates covering the entire stay (frequency “1” indicates no interim claims). Step 5: Submit the claim electronically via the Provider Online Service Center (POSC) or through other approved electronic channels. Step 6: Retain documentation of the swing‑bed stay and the submission confirmation as required by the payer.

Common Mistakes & Audit Red Flags

The provided sources do not explicitly list audit red flags for TOB 0181, but general principles from the code structure and submission rules can help identify common pitfalls. Using the wrong frequency digit is a frequent error: for example, billing with frequency “2” (Interim – First Claim) when the entire stay is completed on one claim could lead to rejection or incorrect payment, as Noridian defines each frequency digit’s distinct purpose ^[1]. Similarly, using care digit “1” (Inpatient Part A) instead of “7” (Subacute Inpatient/Swing Beds) would misrepresent the type of service and cause a billing mismatch. Another red flag is submitting a paper claim without a waiver; the MassHealth UB‑04 Guide clearly states that all claims must be electronic unless a waiver is approved, and failure to comply may result in claim denial ^[2]. Also, entering the leading zero incorrectly or omitting digits in the four‑digit field could cause the claim to be rejected by the fiscal intermediary. Providers should also ensure that the patient’s coverage supports swing‑bed services (e.g., Medicare Part A for qualifying stays) and that the dates of service match the admission and discharge dates on the claim.

Related Codes/Fields

The table below lists other frequency codes from Noridian that can be combined with facility digit “1” (Hospital) and care digit “7” (Subacute Inpatient/Swing Beds) to create other valid Type of Bill codes for swing‑bed billing ^[1]. Note that only frequency definitions applicable to hospital swing‑bed claims are included; the full list of frequency digits is provided in the source.

Code	Frequency Meaning (4th Digit)	Use Case for Swing Beds
0181	Admit Through Discharge	Complete swing‑bed stay from admission to discharge
0182	Interim – First Claim	First claim of a series for an ongoing swing‑bed stay
0183	Interim – Continuing Claims	Subsequent interim claims for ongoing swing‑bed stay
0184	Interim – Last Claim	Final interim claim to complete a swing‑bed stay
0185	Late Charge Only	Late charges after the final swing‑bed claim
0187	Replacement of Prior Claim	Correcting a previously submitted swing‑bed claim
0188	Void/Cancel of Prior Claim	Voiding a prior swing‑bed claim

For the facility and care digits, other codes such as 0111 (Inpatient Part A – Admit Through Discharge) or 0121 (Inpatient Part B – Admit Through Discharge) may be relevant to the same facility type but different care categories ^[1]. Providers should refer to the full Noridian bill‑type resource to confirm correct codes for their specific situation.

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References

[1] Noridian Bill Types — https://med.noridianmedicare.com/web/jea/topics/claim-submission/bill-types

[2] MassHealth UB-04 Guide — https://www.mass.gov/doc/ub-04-billing-guide-0/download