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Gastroenterology Billing Services
Screening Conversions, Sedation Coding, and Endoscopy Bundling Are Costing Your GI Practice Qualigenix codes and bills colonoscopy, EGD, ERCP, capsule studies and biologic infusions for independent gastroenterology practices and endoscopy centers in 48 states. Our GI coders work at 98.9% coding accuracy and a 98.6% compliance and audit pass rate.
What Gastroenterology Billing Involves
Gastroenterology billing means coding each scope to the procedure that was actually done, then telling the payer whether it started as a screening, a diagnostic study, or a screening that turned diagnostic. Sedation, pathology, multiple-endoscopy pricing and Medicare frequency limits all sit on top of that. Qualigenix handles all of it with dedicated GI coders, so your colonoscopy claims go out right the first time.
01
Endoscopy & ICD-10 Coding
A single colonoscopy can carry a biopsy, a snare polypectomy and a band ligation, each with its own CPT code in the 45378–45398 family. The ICD-10 order matters as much as the CPT: a screening Z code listed after a polyp finding changes how Medicare and commercial payers process the claim.
02
Biologic & Capsule Authorizations
Infliximab, vedolizumab and other IBD biologics need prior authorization and periodic reauthorization. Capsule endoscopy often needs proof that an EGD and colonoscopy came first. A lapsed approval turns a high-dollar infusion into a write-off.
03
Screening vs. Diagnostic Colonoscopy
Medicare uses G0105 and G0121 for screening colonoscopy and the PT modifier when a screening becomes diagnostic. Commercial plans usually want modifier 33 instead. Since 2023, Medicare also treats a colonoscopy that follows a positive stool-based test as part of screening. Getting this wrong shifts cost to the patient and creates appeals.
04
Sedation & Anesthesia Reporting
Moderate sedation by the endoscopist is billed with 99152 and 99153. Anesthesia by a separate provider uses 00811, 00812 or 00813. Payers deny claims where the sedation code, provider and documented time don't line up.
05
Screening Frequency Checks
Medicare and most commercial plans limit how often a screening colonoscopy is covered. If nobody checks the last screening date before the visit, the claim denies after the scope is done.
06
Necessity for Repeat Scopes
Surveillance colonoscopies and repeat EGDs need a documented reason, such as prior adenoma history or Barrett's esophagus. Notes that only say "follow-up" don't support the interval.
07
NCCI & Modifier Denials
Endoscopy codes in the same family bundle under NCCI edits and Medicare's multiple-endoscopy rule. Modifier 59 or XS appended without a separate site or lesion in the note is a common audit finding.
08
Medicare Screening Rules
Coverage rules for screening changed in 2023, when Medicare lowered the starting age to 45 and expanded the follow-on colonoscopy benefit. Practices still running old claim edits bill these visits wrong.
How Qualigenix Fixes Each GI Billing Gap
Qualigenix assigns certified GI coders to your account, and each gap above has a set step in our workflow.
Endoscopy Charge Capture
Coders read the procedure note and pathology together, so every biopsy, polypectomy and dilation reaches the claim. Our charge capture accuracy is 98.5%.
Biologic Authorizations
We track each infusion patient's approval dates and unit limits, and start reauthorization before the current approval ends.
Modifier 33 & PT Control
We apply PT or 33 by payer, based on what the scope found, so the patient's preventive benefit holds where the rules allow it.
Sedation Coding Review
We match the sedation code to who gave it, the documented start and stop times, and the patient's age.
Frequency & Benefit Checks
Before each screening, we check the last covered date and the patient's plan rules, and flag visits that won't be covered.
Procedure Note Review
We send providers short, specific queries when a note is missing an indication, a lesion site or a sedation time.
Denial Appeals
GI denials go into our appeals queue with the procedure note and pathology attached. Qualigenix overturns 79% of denials across the 50,000 denials it works each month.
Screening Rule Monitoring
We update claim edits when CMS or a payer changes screening, sedation or bundling rules.
CASE STUDY 01
How a 3-provider podiatry group cleared $214K in aged A/R
THE SITUATION
A 3-provider podiatry group with roughly 60% Medicare payer mix carried $412,000 in A/R, 38% of it past 120 days. Routine foot care claims (11720, 11721, 11055–11057) had stalled on inconsistent Q7/Q8/Q9 modifiers and class-finding documentation, so payers held or partially paid and nobody worked the remainder. Medicare crossover to secondaries was not being posted, and small patient balances were written off.
WHAT QUALIGENIX DID
We ran a full A/R aging segmentation, worked claims by payer and denial reason rather than by date, rebilled the stalled routine-care claims with corrected modifiers, and reactivated secondary and crossover billing.
Key Outcomes & Turnaround
38% to 14%A/R past 120 days
$214,000recovered from aged A/R
90 daysto turn it around
~60%Medicare payer mix
Audited Practice Results
How a solo podiatrist lifted first-pass acceptance to 96%
THE SITUATION
A solo podiatrist coding 320 encounters a month was stuck at 82% first-pass acceptance. Routine foot care went out without the systemic-condition diagnosis pairing and class findings Medicare requires, so it read as non-covered. Wound debridement was coded to the wrong depth (11042 for skin and subcutaneous where the note supported 11043 for muscle and fascia). Same-day E/M with a procedure went out without modifier 25 and got bundled.
WHAT QUALIGENIX DID
We rebuilt the coding workflow: diagnosis-to-CPT pairing rules for at-risk foot care, correct Q-modifier logic, depth-based debridement coding tied to the operative note, and disciplined use of modifiers 25 and 59/XS.
Key Outcomes & Turnaround
82% to 96%first-pass acceptance
+11%per-encounter reimbursement
60 daysto turn it around
320/moencounters coded
Audited Practice Results
How a 2-location podiatry practice cut its denial rate by two-thirds
THE SITUATION
A 2-location podiatry practice sat at a 19% denial rate, mostly Medicare routine-foot-care and nail-debridement rejections. The denials clustered in three buckets: medical-necessity rejections on routine foot care (missing qualifying diagnosis and class findings), frequency-edit denials on nail debridement billed inside the 60-day window, and missing Q modifiers that flagged services as non-covered.
WHAT QUALIGENIX DID
We built a front-end denial-prevention layer, checking eligibility and coverage against payer LCDs before claims went out, plus a structured appeal workflow with documentation templates mapped to each denial reason.
Key Outcomes & Turnaround
19% to 6%denial rate
$68,000recovered on appealed claims
4 monthsto turn it around
2 locationspractice size
Audited Practice Results
Gastroenterology Coding Matched to Your Procedures
Qualigenix codes the full GI service mix, from routine screening to advanced endoscopy and infusion.
Colonoscopy (45378–45398, G0105, G0121)
Diagnostic and therapeutic colonoscopy, Medicare screening codes, and the PT and 33 modifiers when a screening finds something.
COMPLIANCE
How We Keep Gastroenterology Billing Compliant
Qualigenix keeps gastroenterology billing compliant by coding every scope to the procedure note and pathology report, applying Medicare screening frequency and PT rules as written, and following NCCI endoscopy family edits on every claim. Underbilling a converted screening leaves earned revenue unpaid. Overbilling sedation or adding unsupported 59 modifiers draws audits and repayment demands. We hold a 98.6% compliance and audit pass rate with an over- and undercoding rate under 2%. All work is HIPAA compliant, with patient data handled under strict security controls.
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Audit Pass Rate
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Variance Threshold
Why Qualigenix
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IMPROPER PAYMENT RATE
0%
FROM DOC GAPS
0%
FROM CODING ERRORS
$0M+
PAID IN ERROR
QUESTIONS BUYERS ASK
Qualigenix quotes each gastroenterology practice after reviewing claim volume, payer mix and the services you need. Most practices start with a free billing audit, which shows where revenue is being lost before any pricing discussion.
If the endoscopist gives moderate sedation, we bill 99152 and 99153 based on documented time. If an anesthesia provider is involved, the anesthesia claim uses 00811, 00812 or 00813, and the endoscopist does not bill sedation.
We check each patient's last covered screening date and risk status before the visit. If the colonoscopy won't qualify as a covered screening, we flag it to your staff in advance.
Yes. Qualigenix works old GI claims by age and dollar value, and across our clients has cut days in A/R from 54 to 36. Most practices start with a free AR review.
For Medicare, we keep the screening context and append the PT modifier to the diagnostic or therapeutic CPT code. For commercial plans that follow preventive-care rules, we use modifier 33, so the patient's screening benefit is applied where the payer allows it.
Yes. Qualigenix bills infusion administration codes such as 96413 with drug J-codes such as J1745, tracks prior authorizations, and reports JW or JZ for single-dose vials.
Qualigenix works in 133 EMR/EHR platforms and bills from your existing system. We confirm access during onboarding.
Qualigenix onboards new practices in 6 days on average, including system access, payer setup and coder assignment.