Type of Bill 111: What It Means and How to Bill It Correctly

Type of bill 111 is the three-digit UB-04 code that tells a payer you are submitting a hospital inpatient claim covering the entire stay, from admission through discharge. The first digit means hospital, the second means inpatient, and the third means this is a single, complete claim. You report it in Form Locator 4 of the UB-04 (CMS-1450), and you send it in the 837I electronic claim.

That is the short answer. The longer answer matters more, because a wrong bill type does not just cause a small typo. It changes how the payer adjudicates the whole claim, which fee schedule applies, and whether you get paid at all. This guide walks through what 111 means, when to use it, which related codes you will meet, the fields that must line up with it, and the mistakes that cost hospitals money.

What Does Type of Bill 111 Mean?

A type of bill code describes three things at once: who is billing, what kind of care was delivered, and where this claim sits in the billing sequence. Here is how 111 breaks down.

Put together, 111 is the standard code for a hospital inpatient claim that encompasses one full confinement, and for which you expect payment from the payer.

One small technical note. The National Uniform Billing Committee (NUBC) defines type of bill as a four-character field with a leading zero, so you may see it written as 0111 in data files. Medicare and most payers work with the three-digit version. Some payers are strict about this. Arizona's Medicaid program, for example, warns providers not to add an extra zero, because a fourth digit makes the claim deny. Always check the payer's billing manual before you assume.

Who Bills with Type of Bill 111?

Type of bill 111 belongs to hospital inpatient billing. In practice that includes:

• Acute care hospitals paid under the Medicare inpatient prospective payment system (IPPS)
• Inpatient psychiatric facilities and inpatient rehabilitation facilities, which use their own payment systems but still bill inpatient stays as 111
• Long-term care hospitals
• Commercial, Medicaid and Medicare Advantage plans that follow UB-04 conventions

Critical access hospitals are the usual exception. Their inpatient claims use the 85X family, so a CAH inpatient stay is typically 851, not 111. Skilled nursing facilities use 211, and hospital swing beds use the 18X family.

Facility billing and professional billing are also two separate worlds. The hospital sends the 111 on a UB-04. The physicians who treated the patient bill their own services on a CMS-1500. If your team handles both sides, it helps to understand how hospitalist billing runs alongside the facility claim so the two stories match.

The Frequency Digit: 110, 111, 112, 117 and 118

The third digit is where most of the day to day confusion lives. The same stay can generate more than one claim over its life, and the frequency digit tells the payer which one it is looking at.

Medicare IPPS hospitals usually bill at discharge. Noridian's inpatient billing guide describes interim billing for stays longer than 60 days, with adjustment claims following every 60 days after that. For most ordinary admissions, none of that applies and 111 is the only claim you will send.

A practical habit I recommend to every billing team: never use 111 to fix a claim that was already paid or denied. A correction goes on a 117, and a cancellation goes on a 118. Resubmitting a second 111 for the same stay is one of the fastest ways to trigger a duplicate denial.

Type of Bill 111 vs Other Common Bill Types

Choosing the right bill type starts with the patient's status at the time of service, not with what is convenient in the billing system. Here is how 111 compares with the codes it is most often confused with.

The mix-up that hurts the most is 131 versus 111. If a patient was formally admitted as an inpatient but the claim goes out as outpatient, the entire payment methodology is wrong. The reverse is just as costly. Observation is an outpatient service, so a patient held in observation for two nights never belongs on a 111 unless a valid inpatient order exists.

If a hospital changes its mind about inpatient status before discharge, the utilization review process and condition code 44 come into play, and the claim is billed as outpatient. That decision needs documentation and physician concurrence, and it should be made before the patient leaves, not after the bill is dropped.

UB-04 Fields That Must Agree with Type of Bill 111

The bill type does not stand alone. Payers check it against other parts of the claim, and a mismatch is where edits fire. These are the fields I look at first on any 111.

FL 4, Type of Bill. Enter 111 (or the payer's equivalent format).

FL 6, Statement Covers Period. From and through dates. For a 111, the through date should match the discharge date.

FL 12 to 15, Admission date, hour, type and source. An inpatient claim needs an admission date. The admission type (emergency, urgent, elective, newborn, trauma) and point of origin should reflect what actually happened.

FL 17, Patient Discharge Status. Status codes such as 01 (home), 03 (skilled nursing facility), 06 (home health) and 20 (expired) affect payment. Certain statuses can trigger the post-acute care transfer policy and reduce the DRG payment, so this field is never a formality.

FL 42 to 47, Revenue codes, descriptions, units and charges. Every service line needs a valid revenue code for that bill type. Room and board sit in the 0100 series, intensive care in the 0200 series, and pharmacy in 0250. The claim ends with a 0001 line for total charges.

FL 67, Principal Diagnosis with POA indicator. The principal diagnosis drives the MS-DRG. A missing or incorrect present-on-admission indicator is a common reason for hospital-acquired condition edits.

FL 74, Principal Procedure. ICD-10-PCS codes go here for inpatient procedures.

Clean diagnosis and procedure coding is the engine behind the DRG, so accurate medical coding upstream protects the claim downstream.

How to Bill a Type of Bill 111 Claim, Step by Step

This is the workflow that keeps inpatient claims clean.

1. Confirm the inpatient order and status. Before anything else, verify a valid physician inpatient order exists and that the stay meets the payer's criteria. For Medicare, the two-midnight benchmark is the usual starting point.
2. Verify coverage early. Check Part A eligibility, benefit days and coinsurance days, along with any secondary insurance. Solid benefits verification at registration prevents surprises at the back end.
3. Handle authorization and notification. Many commercial and Medicare Advantage plans require notification or authorization for inpatient admission. A missing authorization is an avoidable denial, which is why hospitals lean on dedicated prior authorization support.
4. Wait for final coding. The claim should not drop until the record is coded, queries are answered, and the discharge is final.
5. Build the claim. Enter 111 in FL 4, match the statement dates to the stay, and confirm the discharge status, diagnoses, procedures and revenue code lines.
6. Run your scrubber edits. Check that dates do not overlap, the admission date is not after the first charge date, and the bill type matches the patient status.
7. Submit electronically on the 837I. More on that below.
8. Post and follow up. Reconcile the remittance against the expected DRG payment and work any difference right away.

Medicare Rules That Shape a 111 Claim

Timely filing

Medicare generally requires claims within 12 months of the date of service. For an inpatient claim, that clock runs from the through date. Commercial payers often give far less, sometimes 90 days, so the contract terms matter.

The 3-day payment window

For IPPS hospitals, certain outpatient diagnostic services and related nondiagnostic services furnished in the three days before admission are bundled into the inpatient claim. They do not get billed separately on a 131. Forgetting this window creates duplicate or overpaid claims, and it is a classic audit finding.

Adjustments and the 60-day window

According to Noridian's inpatient billing guide, changes that lead to a higher-weighted DRG must be made within 60 days of the remittance date. After that, the claim cannot be corrected by adjustment or by cancel and rebill. Changes that result in a lower-weighted DRG can still be submitted later so the overpayment can be returned. The lesson is simple: review DRG accuracy quickly, and do not let a coding question sit.

Late charges

Medicare does not accept late charge bills for inpatient hospitals. If a charge was missed on a claim that already processed, you correct it through a 117 replacement claim, following the payer's rules.

Fresh data: FY 2027 IPPS

Every discharge on or after October 1, 2026 prices under the FY 2027 IPPS rules. CMS finalized the rule on July 31, 2026, and it was published in the Federal Register on August 4, 2026. It includes a 2.3 percent operating payment update for hospitals that meet quality reporting and EHR requirements. That figure is a 3.2 percent market basket increase less a 0.9 percentage point productivity adjustment. CMS also recalibrated the MS-DRG weights and adjusted wage index policy, including ending the low-wage index policy with a budget-neutral transition.

Here is why this matters for a 111 claim. IPPS pricing follows the discharge date. A patient admitted on September 29, 2026 and discharged on October 3, 2026 is paid under the FY 2027 tables, even though part of the stay fell in FY 2026. Your billing team should confirm that discharge dates, DRG assignment and pricer versions are all aligned with the new fiscal year.

Common Type of Bill 111 Mistakes and How to Fix Them

Most of these are preventable with front-end discipline and a good scrubber. The ones that still slip through end up in appeals, and a structured denial management process is what turns those denials into recovered revenue. For a deeper look at prevention, read our guide on how to prevent claim denials.

How Type of Bill 111 Works on the 837I

On paper, FL 4 shows three digits together. In the 837I electronic file, the code is split. The facility type code (11) goes in CLM05-1, and the claim frequency code (1) goes in CLM05-3. So a 111 on the UB-04 becomes 11 and 1 in separate data elements.

This is worth knowing because a clearinghouse or payer rejection citing the facility code or frequency code often means the two pieces were entered incorrectly, or a replacement claim is missing the original claim reference number. If you are sending a 117 or 118, the payer expects the original claim control number to be included so it knows which claim you are changing.

Frequently Asked Questions About Type of Bill 111

Final Thoughts

Type of bill 111 looks like three simple digits, but it sits at the center of every hospital inpatient claim. Get it right and the claim moves cleanly through the payer's edits. Get it wrong and you are looking at rework, delayed payment, and in the worst cases, an audit trail you did not want. The habits that protect you are the same ones that have always worked: confirm patient status early, verify the dates, match the discharge status, code carefully, and correct with the right frequency code instead of a new claim.

With FY 2027 rates now in effect for discharges on or after October 1, 2026, this is a good moment to audit your inpatient workflow. Stronger revenue cycle management starts with getting the small details on the front of the claim right, and steady follow-up on open account receivables makes sure those claims turn into cash.

Written by

ClainetRCM Billing Team

ClainetRCM is a Boston-based revenue cycle management company specializing in medical billing, coding, and denial management for healthcare providers across all 50 states. Our AAPC and AHIMA certified coders track every ICD-10-CM update so claims go out coded to the current fiscal year's release.