Modifier 25
Same-day visitFor a significant, separately identifiable visit on the same day as a procedure. The note has to show work beyond the usual care around the procedure, not only the decision to do a minor one.
Medical Coding Services by Certified Coders
AAPC-certified coders read the note and code what it supports: visit levels, procedures, modifiers and diagnoses, checked against payer edits before the claim leaves, inside the EHR you already use.
- AAPC-certified coders
- 3 to 5% of collections, month to month
- Free RCM audit in 3 to 5 business days
Medical coding
Where coding loses money
Coding errors cut both ways. Under-coding leaves money in every visit, and over-coding, or modifiers added by reflex, draws the reviews that take it back.
- 01
Visit levels chosen by habit
Office visits have been leveled on medical decision making or total time since 2021. Practices that still code to a familiar level under-code complex visits and over-code simple ones.
- 02
Modifiers 25 and 59 added by reflex
Both modifiers get claims past edits, and both draw review when they appear on almost every claim. Each needs a note that shows the separate service.
- 03
Edits found by the payer
Code pairs that cannot be billed together and unit limits per day are published every quarter. A claim that ignores them is denied or cut.
- 04
Diagnoses that do not support the procedure
The diagnosis has to be specific enough, and on the coverage policy's list, for the procedure to pay.
- 05
Code set changes missed
ICD-10-CM changes every 1 October, CPT every 1 January, and payer edits every quarter. Old codes deny from the first day they stop being valid.
E/M
Visit levels since 2021
Since 2021, office and outpatient visits are leveled on medical decision making or on total time spent on the date of the visit, and history and exam no longer decide the level. In 2023 the same approach reached hospital, observation, consultation, emergency department, nursing facility and home visit codes. Emergency department visits cannot be leveled on time.
When time is the basis, these are the thresholds for office visits.
| Code | Total time on the date of the visit | Note |
|---|---|---|
| 99202 | 15 minutes | New patient |
| 99203 | 30 minutes | New patient |
| 99204 | 45 minutes | New patient |
| 99205 | 60 minutes | New patient; prolonged time is counted beyond this |
| 99212 | 10 minutes | Established patient |
| 99213 | 20 minutes | Established patient |
| 99214 | 30 minutes | Established patient |
| 99215 | 40 minutes | Established patient; prolonged time is counted beyond this |
Prolonged time is where Medicare and CPT part ways. CPT's 99417 adds 15 minutes at a time beyond the level's required time, so a 99215 picks up its first unit at 55 minutes. Medicare does not accept 99417 and uses G2212, counted from the end of the time range CMS assigns, so the first unit on a 99215 starts at 69 minutes.
Specialty rules, such as the global surgery package or eye codes, are covered on each specialty page.
Modifiers
The modifiers that draw review
Modifier 59 and the X modifiers
XE · XS · XP · XUThe X modifiers are more specific versions of 59: XE for a separate encounter, XS for a separate organ or structure, XP for a different practitioner and XU for a service that does not overlap the main one. CMS says to use them instead of 59 whenever possible. Modifier 59 does not go on a visit, which takes 25.
Modifier 22
Increased workFor a procedure that took substantially more work than usual. The operative note has to give the reason and the extra time or effort, and payers commonly ask for it before paying.
Global surgery modifiers
24 · 57 · 58 · 78 · 79Visits and procedures inside a global period need the modifier that explains them. They are covered on the general surgery page, and you can check a date with the global period checker.
Source: CMS MLN1783722, April 2026
Edits
Edits checked before the claim leaves
The National Correct Coding Initiative publishes two kinds of edit, and CMS updates both every quarter. The current files took effect on 1 October 2026.
Procedure-to-procedure edits
PTPPairs of codes that should not be billed together for the same patient on the same day. Some pairs can be separated with a modifier when the note shows a separate site, session or service. Others cannot be separated at all.
Medically unlikely edits
MUEThe maximum units of a code that most correct claims report for one patient on one day. Not every code has one, and CMS keeps some values confidential. Units above the limit are denied, and some limits cannot be exceeded even on appeal.
Source: CMS NCCI edits · CMS NCCI MUEs
Calendar
When the code sets change
| Code set | When it changes | What it means for claims |
|---|---|---|
| ICD-10-CM | Every 1 October, with occasional 1 April updates | The FY2027 codes apply to encounters from 1 October 2026 to 30 September 2027 |
| CPT | Every 1 January | New, revised and deleted codes apply by date of service |
| HCPCS Level II | Quarterly | Drug, supply and G-codes are added and retired through the year |
| NCCI edits | Quarterly | Code pairs and unit limits change; the current files took effect on 1 October 2026 |
| Coverage policies | Any time | Local coverage determinations and billing articles change diagnosis lists and documentation rules |
Source: CMS ICD-10 code sets · CMS NCCI edits
Audits
Coding audits and provider feedback
Coding review is not only about the claim in front of us. Patterns by provider and by code family show where documentation needs to change, and we feed that back to the provider who wrote the note.
It works in the other direction too: when a note supports more than was billed, the provider hears that as well.
To check common traps yourself, our free tools cover lesion excision codes, colonoscopy coding, psychotherapy time codes, allergy immunotherapy units and urodynamics components.
Comparison
Before and after working with Quilven
A process comparison, not a promise of outcome. It shows what changes in how claims are coded.
| Area | Before | With Quilven |
|---|---|---|
| Visit levels | Levels chosen by habit or by template. | Levels supported by medical decision making or documented time. |
| Modifiers | 25 and 59 added to clear edits. | Modifiers used only where the note shows a separate service, with X modifiers where they fit. |
| Edits | Code pair and unit edits found by the payer. | NCCI pairs and unit limits checked before submission against each quarter's files. |
| Diagnoses | Unspecified codes, and diagnoses missing from the coverage policy's list. | Diagnoses coded to the specificity in the note and checked against the policy. |
| Code updates | Deleted codes still on the fee slip after 1 January. | Code set changes loaded before their effective date. |
| Feedback | Coding problems found only when claims deny. | Patterns fed back to each provider with the documentation they need. |
| Rejections | Rejected claims sit in the clearinghouse queue until the filing window closes. | Rejections worked within four to five days, while the claim is still recoverable. |
Which of these applies to your claims is a question the audit answers. Request the audit.
Case study
Where the $5,500 was hiding
One AR recovery engagement, at a family medicine practice in Minnesota. Shown for method. Individual results vary. One engagement is not a forecast.
We reviewed 245 claims. The rejection queue had no owner, and some claims in it had waited close to a year.
Billed charges in that queue came to roughly $40,000 to $50,000, none of it being worked.
Most of the damage started before the claim was built. Stale coverage, incorrect member IDs and skipped eligibility checks at the front desk caused 70% of the denials.
Not everything could be reopened. On most of the affected claims, a commercial payer's 90-day window had already passed with no proof of submission on file, so appeals were not possible.
What came back was about $5,500, paid on 50 to 55 claims, most of it within 45 to 50 working days.
In their words
What the physician said
What you have provided for me was a detailed of things that are going wrong that needed to change in our practice.
I appreciate that you did an audit and found out the root causes of a lot of my problems which are preventable.
I appreciate the professionalism, the courtesy, the knowledge.
After the audit the practice changed how it runs: eligibility verified before arrival, no more walk-ins, every patient checked the night before.
Pricing
What Quilven costs
Certified coding is included in medical billing: 3 to 5 percent of collections with a $500 monthly minimum, the same for every specialty. You can see pricing in full.
AR recovery
12 to 15%
of the recovered amount
No fee on what is not recovered. Where a practice lands in the range depends on claim volume, age of the inventory, and payer mix.
Medical billing
3 to 5%
of collections by monthly volume
A $500 monthly minimum applies. The rate moves with monthly volume, not with headcount on your side.
Credentialing
$150 to $200
per payer application
$200 per application, or $150 each on larger batches. Included in the billing percentage for billing clients.
Fit
Fit with your EHR
Outside coding does not require a system swap. We integrate with 30+ EHRs and practice management systems and work inside the one you already have. No data migration, no parallel system, no change to how your staff enters a charge or checks a patient in. If your team is trained on your current software, that training stays valid.
This matters because the usual objection to outside coding help is that it turns into an implementation project. It does not here. Quilven is a managed service, not software. There is no proprietary platform you are asked to adopt and no license to renew, so the engagement can start on this month's charts rather than after a build-out.
What you do get is visibility. Apex is our client dashboard, and it shows in real time:
- Net collection rate
- AR aging by bucket
- Denial reasons by payer
- Credentialing pipeline
Apex reads the work we are doing in your system. It is a window, not a replacement, so if the engagement ends your records and workflows are exactly where they were.
Company
Who Quilven is
Quilven is a managed revenue cycle service. Not software, not an EHR, and not a proprietary platform you have to adopt. We work inside the system your practice already uses, across 30+ integrations, with no data migration and no workflow change. Our clients are independent practices with 3 to 25+ providers.
Pricing is straightforward. AR recovery is 12 to 15 percent of the recovered amount. Medical billing is 3 to 5 percent of collections by monthly volume, with a $500 monthly minimum. Credentialing is $150 to $200 per payer application.
The entry point is a free RCM audit. It takes 3 to 5 business days and returns a line-by-line recoverable revenue estimate by payer, so the first thing you get from us is a diagnosis you can act on with or without us.
We lead with method and evidence rather than tenure. Quilven was founded in 2025 by Raief Shick and works from 159 4th Ave N, Suite 100, Nashville, TN 37219. The entity is registered in Wyoming. Reach us at (202) 490-9406 or info@quilven.com.
Fit
Who this is for
Independent, physician-owned practices with 3 to 25+ providers that want certified coders on every claim, not only on the denied ones. Solo practices are welcome too.
Specialty rules are covered on each specialty page, from dermatology lesion coding to orthopedic global periods. Browse all specialties.
It is not for hospitals coding facility claims.
At a glance
Medical coding service facts
- Service
- Certified medical coding for independent practices
- Covers
- E/M leveling, procedure and diagnosis coding, modifiers, NCCI edit checks, code set updates, provider feedback
- Coders
- AAPC-certified
- Delivery model
- Managed service, not software, not an EHR
- Systems
- 30+ EHR and practice management integrations, no data migration
- Practice size served
- 3 to 25+ providers, independent and physician-owned; solo practices welcome
- Pricing
- Included in medical billing: 3 to 5% of collections, $500 monthly minimum
- Entry point
- Free RCM audit, 3 to 5 business days, recoverable estimate by payer
- Reporting
- Apex dashboard: denial reasons by payer, AR aging by bucket, net collection rate
- Area served
- United States
FAQ
Medical coding questions
Yes. Our coders are AAPC-certified and code from the clinical documentation in your own system.
Yes. Since 2021, office and outpatient visits can be leveled on medical decision making or on total time on the date of the visit. Emergency department visits cannot be leveled on time.
Both report prolonged office time in 15-minute units. CPT's 99417 starts 15 minutes past the level's required time, so at 55 minutes for a 99215. Medicare does not accept 99417 and uses G2212, which starts at 69 minutes for a 99215.
Whenever one fits. CMS says to use XE, XS, XP or XU instead of 59 whenever possible, and to keep 59 for cases none of them describes. Modifier 59 does not go on a visit, which takes modifier 25.
NCCI code pair and unit edits change every quarter, ICD-10-CM every 1 October and CPT every 1 January. Coverage policies can change at any time.
No. Certified coding is included in medical billing at 3 to 5 percent of collections, with a $500 monthly minimum, the same for every specialty.
Sources
Sources
Checked 17 October 2026. Coverage policies and code rules revise without much notice, so confirm the current version before you rely on one.
- American Medical Association, CPT evaluation and management
- CMS MLN006764, Evaluation and Management Services guide, May 2026
- CMS MLN1783722, Proper use of modifiers 59, XE, XP, XS and XU, April 2026
- CMS, National Correct Coding Initiative (NCCI) edits
- CMS, NCCI medically unlikely edits (MUEs)
- CMS, ICD-10 code sets (FY2027)
Next step
Start with a free RCM audit
The audit takes 3 to 5 business days and returns a line-by-line recoverable revenue estimate by payer, plus the repeating root causes behind your denials. We only need aging totals to begin. No patient data, no contract, no obligation to work with us afterward. If your aging is healthy we will tell you that.
Answer three questions below and book a line-by-line audit of your coding.
Where it leaks
Oldest claim
Practice size
Your details
Where is the money leaking right now?
Pick the one that hurts most. We start there.
How old is your oldest unpaid claim?
A round number is fine. We verify it in the audit.
How big is the practice?
Just you, or a group. Either is welcome.
Last bit — where do we send the report?
No patient data. We only need aging totals to start.
(202) 490-9406 · info@quilven.com · Book 15 minutes