Urgent care billing
Visit levels, procedure modifiers and lab codes checked on every walk-in claim.
We bill urgent care the way payers price it: the place of service your contract expects, visit levels by decision making or time, modifier 25 only when the visit stands apart from the procedure, and waived tests with QW and each site’s CLIA number.
- Full-service rate
- 3% to 6% of collections
- Medicare POS 20 rate
- Same as office (non-facility)
- Waived lab tests
- QW and a CLIA number per site
- New & smaller practices
- Flexible monthly minimum
What makes urgent care billing different
Urgent care runs on unscheduled volume. A typical claim is an office visit, often with a laceration repair, a splint, an X-ray or a rapid test, and the plan and copay have to be confirmed before the exam room.
We check eligibility at check-in, code each visit from the note, and work denials and patient balances inside our full revenue cycle service at 3% to 6% of collections.
Place of service and visit codes
Medicare rules and 2026 code times. Commercial plans set their own in each contract.
- POS 20Urgent care facility: a location distinct from a hospital ER, an office or a clinic, for unscheduled patients who need immediate care.
- POS 11Office. Medicare pays POS 11 and POS 20 at the same non-facility rate.
- New patients99202 to 99205: 15, 30, 45 and 60 minutes of total time on the date, or straightforward to high decision making.
- Established patients99212 to 99215: 10, 20, 30 and 40 minutes, or the matching decision making. 99211 may not need a physician or other qualified practitioner.
- S9083 and S9088Payer-specific urgent care codes. Medicare’s 2026 fee schedule file marks both not valid for Medicare.
- 99050 and 99051After-hours and evening, weekend or holiday add-ons. Medicare bundles both; check your commercial contracts.
Visit levels, and the S codes some plans use
The visit level is chosen by medical decision making or by the practitioner’s total time on the date of the visit. CMS’s E/M services booklet adds that when you use time, the full time must be met (the midpoint rule does not apply), and the note should show total time or start and stop times.
S9083 is a global fee for urgent care centers; S9088 is billed on top of the service codes to show care was given in an urgent care center. Both are payer-specific. Ambetter Health in Pennsylvania, for example, has paid them only with place of service 20 since August 1, 2026. Medicare does not use them: its 2026 fee schedule file lists both as not valid for Medicare. We bill them only where your contract says to.
Procedures, X-rays and modifier 25
In the 2026 fee schedule file, simple laceration repairs (12001 to 12018) and splints such as 29125 have a 0-day global period, while intermediate repairs (12031 and up) and abscess drainage (10060, 10061) have 10 days. The decision to do a minor procedure is part of the procedure, so a same-day visit is billed only when it is significant and separately identifiable, with modifier 25, under the CMS global surgery booklet.
A child with a chin laceration who also needs a head injury workup can support an E/M with 25. A visit that only looks at the cut and decides to close it cannot.
X-rays split into a professional part (26) and a technical part (TC). If your clinic owns the machine and your provider reads the film, bill globally; if an outside radiologist reads it, you bill TC and the radiologist bills 26.
CLIA-waived tests and the CLIA certificate
Every testing site needs its own CLIA certificate, and a site running only waived tests holds a certificate of waiver, under chapter 16 of the Medicare Claims Processing Manual. Some waived tests have their own codes; others need QW to be recognized as waived. Medicare edits each lab line against the certificate on file.
The 10-digit CLIA number goes in item 23 of the CMS-1500 or the REF X4 segment of the 837P. Tests run at different sites go on separate claims with each site’s number, and a claim with no number comes back with reason code 16 and remark MA120.
Copays, eligibility and good faith estimates
Our eligibility verification team sets up a check for every visit, so the plan, the urgent care copay and any deductible are known before the patient is seen and the copay is collected at check-in.
For uninsured and self-pay patients, 45 CFR 149.610 requires a good faith estimate when a service is scheduled at least 3 business days ahead (within 1 business day, or 3 if scheduled 10 or more days out) or when the patient asks (within 3 business days). For a walk-in, that means on request. You must also say estimates are available: on your website, in the office and out loud when patients ask about cost.
If the bill comes in $400 or more above the estimate, the patient can start the federal dispute process, so our patient billing team checks self-pay bills against the estimate first.
Why urgent care claims deny
The denials we see most often on walk-in claims:
- An E/M with a minor procedure and no modifier 25, or 25 with nothing separate in the note
- No CLIA number, a waived test without QW, or a test the site’s certificate does not cover
- S9083 or S9088 sent to a plan that does not pay them, or with the wrong place of service
- A global X-ray billed when an outside radiologist also billed the reading
- Coverage ended, or the wrong plan on file, because eligibility was not rechecked
- A physician, PA or NP not yet enrolled at that location on the date of service
Each goes through our denial management process, corrected and resubmitted or appealed with the note.
How we run urgent care billing
Map each contract
Place of service, S codes, after-hours codes and copays, per payer.
Check at check-in
Eligibility and the copay are confirmed for every walk-in.
Code from the note
Visit level, modifier 25, X-ray components, QW and the CLIA number, before claims go out.
Work what comes back
Denials are worked by payer and reason until paid or closed with a reason.
Report monthly
Visits, collections, days in A/R and denials by reason, by site and provider.
Credentialing a multi-provider urgent care group
An urgent care group enrolls as a group under its own NPI, then every physician, PA and NP enrolls and reassigns payment to it, at every location they work. Medicare wants a new, moved or closed location reported within 30 days under 42 CFR 424.516, so we add after-hours and seasonal sites before they open. PAs and NPs billing under their own NPI are paid 85 percent of the physician fee schedule. Our provider credentialing service handles it at $189 per payer application, less in bulk.
Not sure your visit levels and lab codes are right? Send us a month of urgent care claims with the notes and we’ll check them, free.
Use the code that describes the site and that your contracts expect. POS 20 is a location, separate from a hospital ER, an office or a clinic, for unscheduled patients needing immediate care. Medicare pays POS 20 and POS 11 at the same non-facility rate, so the choice matters most for plans that tie urgent care codes to POS 20.
No. Medicare’s 2026 fee schedule file lists both as not valid for Medicare, so you bill Medicare the E/M and procedure codes for what was done. Some commercial plans, such as Ambetter Health in Pennsylvania, pay S9083 as a global urgent care fee or S9088 as an add-on, only with place of service 20. Follow each contract.
When the visit includes significant, separately identifiable work beyond deciding to do the procedure. The evaluation that leads to a minor procedure, such as a laceration repair, is part of the procedure. When the patient also needs care for a separate problem, bill the E/M with modifier 25 and document that work in the note.
Yes. Every site that runs lab tests needs a CLIA certificate, and a site running only waived tests holds a certificate of waiver. The site’s 10-digit CLIA number goes on each lab claim, some waived tests need QW, and tests from different sites go on separate claims.
Yes, to uninsured and self-pay patients. An estimate is due within 3 business days when a patient asks, and within 1 to 3 business days when a service is scheduled at least 3 business days ahead. You must post and tell patients that estimates are available. A bill $400 or more above the estimate can be disputed.
Our full-service rate is 3% to 6% of monthly collections, set by your volume, with no setup or onboarding fees and flexible monthly-minimum plans for new and smaller practices. It covers eligibility checks, prior authorizations, coding, claims, payment posting, denials and A/R follow-up. Your exact rate comes after a free A/R review. Our guide to medical billing costs shows how to compare quotes.
Yes. We don’t list our clients on this site, but ask us and we’ll arrange it: with a current client’s permission, we share their contact details so you can hear how we work from them directly.
From our guides
How to calculate days in A/R
The formula with a worked example and a calculator, the benchmarks, why a good average can hide old claims, and the fixes that bring days in A/R down.
How much do medical billing services cost?
The four ways billing companies price their work, the fees that sit outside the rate, and in-house arithmetic built from BLS data, so you can compare quotes on your own numbers.
Send us your last 90 days of urgent care claims.
We’ll review them free and show you where visit levels, modifier 25 or lab codes are costing you money.