Glossary · Reimbursement

OPPS status indicator

An OPPS status indicator is a single letter or alphanumeric code that CMS assigns to every HCPCS/CPT code to tell a hospital outpatient department exactly how—or whether—Medicare will pay for that service under the Hospital Outpatient Prospective Payment System. The indicator determines whether a code receives a separate APC payment, gets packaged into another service's payment, is denied outright, or is paid through a completely different fee schedule.

Verified May 8, 2026 · 6 sources ↓

Drawn from CMSNoridianFederalregister

Definition

Source · Editorial summary grounded in 6 cited references ↓

Every HCPCS Level I (CPT) and Level II code submitted on a hospital outpatient claim (bill types 12x and 13x) carries an OPPS status indicator published annually in CMS Addendum B and updated quarterly. The indicator is the first filter a Medicare Administrative Contractor (MAC) applies when adjudicating an outpatient claim. A code assigned status indicator 'S' or 'T', for example, triggers a discrete Ambulatory Payment Classification (APC) payment—though 'T' procedures are subject to a 50% discount on the lower-paying service when multiple significant procedures appear on the same claim. Status indicator 'N' means the item is packaged: no separate reimbursement is issued because its cost is already embedded in the APC rate for the primary service. Status indicators 'A' and 'Q4' signal that payment occurs outside OPPS entirely—through a fee schedule such as the Clinical Laboratory Fee Schedule or the Physician Fee Schedule—so the hospital must ensure correct bill routing.

For orthopedic services specifically, understanding status indicators is non-negotiable. A humeral fracture care code may carry indicator 'T', while a cast application billed on the same encounter drops to 50% reimbursement as the secondary 'T' procedure. Device pass-through codes (indicators 'H' and 'K') yield a separate, additional APC payment for novel implants—relevant for orthopedic surgeons introducing new bone anchors, tissue markers, or antimicrobial-eluting bone void fillers. Inpatient-only procedures (indicator 'C') are flatly denied in the outpatient setting; submitting them on a 12x bill type results in a denial with beneficiary liability, making pre-claim site-of-service verification essential.

CMS updates status indicators not only in the annual OPPS final rule (published each November in the Federal Register) but also through quarterly change requests—sometimes retroactively, as seen when CPT codes 98980 and 98981 had their indicators changed from 'B' to 'A' retroactive to January 1, 2025, in the July 2025 update. Hospitals and coders must monitor CMS Addendum D1 and quarterly MLN Matters articles to stay current, because a code's indicator can shift mid-year and affect claims already adjudicated.

Why it matters

A misread or outdated status indicator directly determines whether a hospital receives a separate APC payment, receives nothing, or triggers a claim denial that shifts liability to the beneficiary. For orthopedic procedures, billing a status indicator 'C' (inpatient-only) procedure on an outpatient bill type results in an automatic denial with the patient held liable—a compliance risk and a patient-relations problem. Similarly, failing to recognize a 'T' indicator pairing means the revenue team may have budgeted for full APC reimbursement on both procedures but will receive only 50% on the lesser one, creating a systematic underpayment that compounds across high-volume fracture care or casting encounters. Incorrect indicator assumptions also drive incorrect patient cost-sharing estimates, which can trigger balance-billing complaints and audit scrutiny.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Billing a status indicator 'C' (inpatient-only) procedure—such as certain complex joint reconstructions—on an outpatient 12x bill type instead of admitting the patient, resulting in an automatic denial with beneficiary liability.
Assuming a 'B' indicator code simply won't pay rather than investigating whether an alternative HCPCS code recognized by OPPS exists for the same service.
Overlooking the 50% multiple-procedure discount triggered when two or more status indicator 'T' procedures appear on the same claim, leading to inaccurate reimbursement projections for fracture care encounters.
Treating status indicator 'N' (packaged) items—such as triamcinolone injections billed alongside a joint procedure—as separately billable, then writing off the resulting zero-payment as a denial rather than expected OPPS packaging.
Using stale Addendum B data when CMS issues a mid-year quarterly update that retroactively changes a code's status indicator, causing claims to be submitted or appealed under the wrong payment logic.
Confusing OPPS status indicators with Physician Fee Schedule payment indicators, which use a different alphanumeric set and govern professional-component payments rather than hospital outpatient facility payments.

Related codes

Codes commonly involved when this concept appears in practice.

CPT

ICD-10

M17.11

Modifiers

59 Distinct procedural service XS Separate structure

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 6 cited references ↓

01Where does CMS publish the official list of OPPS status indicators?

CMS publishes status indicator definitions in Addendum D1 and code-specific assignments in Addendum B of the annual OPPS final rule. Quarterly updates are distributed via MLN Matters Change Request articles and posted to the CMS Addendum A and Addendum B Updates page.

02What happens when a hospital bills a status indicator 'C' procedure on an outpatient claim?

The MAC will deny the claim under OPPS. For inpatient-only procedures, the correct action is to admit the patient and bill on an inpatient claim. Submitting on a 12x outpatient bill type results in denial with beneficiary liability, meaning the patient—not Medicare—could be billed, creating both a compliance risk and a patient-relations issue.

03Is a status indicator 'N' code a denied code?

No. Status indicator 'N' means the item or service is packaged—its cost is already factored into the APC payment rate for the primary service on the same claim. The MAC issues no separate line-item payment, but the service is considered covered and reimbursed indirectly.

04How does the status indicator 'T' discount work in orthopedic fracture care?

When two or more status indicator 'T' procedures appear on the same outpatient claim, Medicare pays the full APC rate for the highest-paying procedure and 50% of the APC rate for each additional 'T' procedure. In a dual-fracture encounter—such as a humerus fracture with separate forearm casting—the lower-reimbursed code is cut in half automatically by the claims processing system.

05Can a status indicator change mid-year, and does that affect previously submitted claims?

Yes. CMS issues quarterly OPPS updates that can change status indicators, sometimes retroactively. The July 2025 update, for example, changed CPT codes 98980 and 98981 from indicator 'B' to 'A' retroactive to January 1, 2025, requiring MACs to reprocess affected claims. Hospitals should audit open and recently paid claims whenever a retroactive change is announced.

06Do OPPS status indicators apply to physician professional-component billing?

No. OPPS status indicators govern hospital outpatient facility payment on bill types 12x and 13x. Physician professional services are paid under the Medicare Physician Fee Schedule, which uses a separate set of payment status indicators with different alphanumeric codes and logic.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira uses OPPS status indicator logic at the point of code selection to flag reimbursement consequences before a claim is submitted. When the documentation supports multiple procedures in an outpatient hospital encounter, Mira identifies any CPT codes assigned status indicator 'T' and surfaces the 50% multiple-procedure discount so that revenue projections reflect actual expected reimbursement rather than full APC rates for every line. If a documented procedure maps to a status indicator 'C' (inpatient-only) code, Mira raises a site-of-service alert prompting the care team to confirm whether inpatient admission is appropriate before the claim is finalized. For device-intensive orthopedic cases—such as encounters involving implantable tissue markers or pass-through device categories—Mira cross-references the current OPPS Addendum B to confirm whether a pass-through HCPCS code (indicator 'H' or 'K') should accompany the primary procedure code to capture the additional APC payment. Mira also monitors quarterly CMS change requests and flags any retroactive status indicator changes affecting codes in the active encounter queue, reducing the risk that a mid-year indicator shift causes systematic underpayment or erroneous beneficiary liability assignment.

See Mira's approach

Multiple procedure payment reduction (MPPR) is a Medicare reimbursement policy that pays 100% for the highest-valued procedure performed on a single patient in a single session, then reduces payment for each additional qualifying procedure on the same day. In orthopedic practice, MPPR most commonly affects the technical and professional components of diagnostic imaging and the practice-expense portion of therapy services.