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Anesthesia billing

Anesthesia Medical Billing Services

Anesthesia is paid on base units, time units and modifiers, not on simple fee schedules. Specialist billers make sure every minute and every modifier is captured.

  • Base + time + modifying units calculated for every case
  • Medical direction and CRNA modifiers (AA, QK, QX, QZ) applied correctly
  • Separate billing for nerve blocks, lines and pain procedures

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97%
Clean-claim rate target
15%
Typical revenue recovered from time capture
< 40
Days in A/R goal
Overview

How anesthesia billing is different

Anesthesia claims are calculated with a unique formula: (base units + time units + modifying units) × conversion factor. Base units come from the anesthesia code for the procedure, time is reported in minutes from start to end of anesthesia care, and physical status modifiers and qualifying circumstances can add units.

Who performed the service matters just as much. Personally performed anesthesia, medical direction of CRNAs, medical supervision and CRNA-only services each use different modifiers and payment percentages. A wrong modifier can cut payment in half or trigger a compliance problem.

Anesthesia groups also bill separate procedures, peripheral nerve blocks for post-operative pain, arterial and central lines, and TEE, that follow their own bundling rules. A specialist billing team reconciles anesthesia records against surgical schedules so no case or add-on service is missed.

Why it's hard

Common anesthesia billing challenges

01

Accurate anesthesia time

Time must be documented to the minute. Rounding or missing end times quietly reduces payment on every case.

02

Concurrency and medical direction

Directing multiple CRNAs changes modifiers and payment rules. Errors are a common audit finding.

03

Physical status and qualifying circumstances

P3–P5 modifiers and codes for extreme age or emergency can add units but are often missed.

04

Separate procedure bundling

Nerve blocks, lines and TEE are only separately billable under certain conditions.

05

Case reconciliation

Without matching anesthesia records to OR schedules, cases go unbilled, especially at multiple facilities.

06

Payer-specific conversion factors

Each payer pays a different conversion factor, so underpayments are hard to spot without contract tracking.

What's included

What a anesthesia billing partner should handle

  • Anesthesia record review and time calculation
  • ASA/CPT anesthesia code assignment
  • Physical status and qualifying-circumstance coding
  • Medical direction and CRNA modifier compliance
  • Nerve block, line and TEE billing
  • Daily case reconciliation with facility schedules
  • Contract and conversion-factor underpayment tracking
  • Denial management and appeals
  • Provider productivity and concurrency reporting
  • Credentialing for anesthesiologists and CRNAs
Coding focus

Key codes in anesthesia billing

Code(s)What it covers
00100–01999Anesthesia procedure codes, each with an assigned base unit value.
AA / ADAnesthesia personally performed by an anesthesiologist / supervision of more than four procedures.
QK / QYMedical direction of two to four concurrent procedures / of one CRNA.
QX / QZCRNA service with medical direction / CRNA service without medical direction.
P1–P6Physical status modifiers describing patient health, which can add units.
99100–99140Qualifying circumstances such as extreme age, hypothermia or emergency.
64400–64530Peripheral nerve blocks, separately billable for post-operative pain when criteria are met.

Code examples are for orientation only. Always code from the current CPT®, HCPCS and ICD-10-CM code sets and payer policies.

Medical direction compliance

Medicare requires the anesthesiologist to perform and document specific steps, pre-anesthetic exam, plan, induction and emergence participation, monitoring and availability, for medical-direction billing. Your billing partner should check this documentation before using QK or QY.

How it works

Find the right billing partner in four steps

1

Share your goals

Tell us your specialty, monthly claim volume, EHR and the problems you want fixed, denials, slow A/R or staffing gaps.

2

Get a free audit

We review a sample of your claims and aging report to show where revenue is leaking and what a specialist could recover.

3

Compare vetted companies

Shortlist billers with proven anesthesia experience, transparent pricing and verified client reviews.

4

Onboard with confidence

Sign a BAA, connect your EHR and clearinghouse, and track clean-claim rate, days in A/R and collections from month one.

Compare

Top-rated medical billing companies

Billing companies listed on BillerFirms, ranked by client reviews. Ask each one about their anesthesia experience.

See all companies
5.0 5 reviews

Who We Are We are Prime Medical Billing Solutions, LLC, a results-driven medical billing and revenue cycle partner headquartered in Atlanta, Georgia. Since about 2015, we have operated with the belief that true value lies in partnering, rather than merely contracting, with providers to ensure personalized attention and peak revenue performance. Founded by seasoned billing professionals with 20+ years of combined expert experience, our home office in Atlanta supports both individual practices and larger provider groups. Our team is passionate about maximizing reimbursements and simplifying the billing journey step by step. What Services We Offer We provide a comprehensive suite of services designed to optimize every phase of the revenue cycle: Claims processing & billing management, including electronic, UB‑04, and HCFA‑1500 formats Accounts receivable and collections, focusing on paid-to...

Atlanta, Georgia
Founded 2015
Claims ProcessingDenial ManagementCredentialing (Payer & License)
No reviews yet

GreenSense Billing is a trusted leader in medical billing and revenue cycle management, providing comprehensive solutions tailored to the unique needs of healthcare providers across the United States. Our mission is to streamline administrative complexities, optimize reimbursements, and enhance financial performance, allowing medical professionals to focus on delivering exceptional patient care. Our Services • We offer end-to-end medical billing and revenue management solutions, including: •  Medical Billing & Coding - Accurate claims processing to maximize reimbursements and minimize denials. •  Revenue Cycle Management (RCM) - A holistic approach to managing claims, payments, and collections. •  Provider Credentialing - Seamless enrollment with insurance networks to ensure timely reimbursements. •  Financial Solutions - Data-driven insights and financial reporting to optimize practice...

Las Vegas, Nevada
Founded 2003
Claims ProcessingDenial ManagementRevenue Cycle Management
No reviews yet

Let’s face it, medical billing shouldn’t be the most challenging part of running a practice. At Medical Lean Management, we take the chaos out of revenue cycle management so you can get back to what matters: delivering excellent patient care. Based in Corona, California, we’re not just another faceless billing company, we’re your partners in efficiency, here to simplify the financial side of healthcare. Why Us? Because We Get It. Paperwork piles up. Claims get denied. Regulations keep changing. It’s enough to make anyone’s head spin. That’s where we step in. We don’t just process claims, we optimize your entire revenue cycle, cutting through the red tape to get you paid faster and with fewer headaches. Our goal? To make your billing so smooth, you’ll wonder how you ever managed without us. Here’s How We Help: ✔ Fewer Denials, More Revenue - Our precision-driven approach slashes claim den...

Corona, California
Founded 1994
Claims ProcessingDenial ManagementRevenue Cycle Management
No reviews yet

Overview & Mission Access Revenue Hawaii, founded in 2022 in Holualoa, Hawai‘i, is a specialized medical billing and revenue cycle management (RCM) company with a primary focus on behavioral and mental health providers. Drawing deeply from social work roots, the leadership team recognized the administrative friction mental health professionals face, credentialing delays, complex payer regulations, EMR documentation requirements, and chose to build a firm that helps clinicians focus fully on patient care. Their mission centers on removing financial and operational barriers so therapists, counselors, and behavioral health groups can thrive financially while delivering quality care to Hawai‘i’s communities. Origin Story & Local Presence The company was born out of a clear insight: behavioral health providers in Hawai‘i suffer unique administrative challenges. From intricate Medicaid billing...

Chandler, Arizona
Founded 2007
Claims ProcessingDenial ManagementRevenue Cycle Management
Pricing

How much does anesthesia billing cost?

Most billing companies charge a percentage of what they actually collect, so their incentive matches yours. Complex specialties sit at the higher end of the range because of prior authorizations, modifiers and appeal work.

Percentage of collections
5% - 8%

Most common. You pay only on money collected.

Per claim
$4 - $10

Predictable for high-volume, low-complexity claims.

Hourly / FTE
$12 - $35/hr

Dedicated billers working inside your systems.

Typical market ranges; actual quotes depend on claim volume, payer mix and scope. Compare quotes from several companies.

FAQ

Anesthesia billing FAQs

Payment equals base units plus time units plus any modifying units, multiplied by the payer’s conversion factor. Time is usually counted in 15-minute units for Medicare.

They tell the payer who provided the anesthesia: personally performed by an anesthesiologist (AA), medical direction of concurrent cases (QK), CRNA with direction (QX) or CRNA without direction (QZ).

Peripheral nerve blocks for post-operative pain can often be billed separately when requested by the surgeon and documented, but not when they are the primary anesthetic.

Common causes are missing or rounded time, missed physical status modifiers, wrong medical-direction modifiers and payers applying the wrong conversion factor.

Yes. Experienced anesthesia billers handle physician-led, care-team and CRNA-only practices across hospitals, ASCs and office-based settings.

Typically 5% to 8% of collections, depending on case volume and the number of facilities served.

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