Anesthesiology Billing Services
Anesthesiology Billing Services That Account for Every Unit You Earn
Anesthesia billing uses a reimbursement model that exists nowhere else in medicine: base units plus time units, physical status modifiers, qualifying circumstance add-ons, and concurrent case rules that all affect what your practice is paid on every case. A single time unit calculation error repeated across a full day of cases creates systematic revenue loss. ProtoMed's certified anesthesia billing specialists ensure every case is calculated and billed precisely. Fewer denials. Faster reimbursements. More revenue.
98%+
Clean Claim Rate
Every anesthesia case reviewed before submission. Time documentation verified. Physical status modifiers confirmed. Qualifying circumstances captured.
Why Choose ProtoMed
Stop Losing Anesthesia Revenue to Unit Errors and Modifier Omissions
Anesthesia billing is built on a fundamentally different reimbursement model than any other medical specialty. Every case is billed using base units determined by the surgical procedure, plus time units calculated in 15-minute increments for the duration of anesthesia care. A single minute misreported on start or end time shifts the unit count, and that error repeats across every case in a day. Add in the physical status modifiers (P1 through P6) that must be applied to reflect patient complexity, the qualifying circumstance codes that apply to emergency cases, obstetric care, and patients under one year, and the concurrent case rules that affect reimbursement when one anesthesiologist supervises multiple CRNAs, and the precision required on every anesthesia claim is significant.
ProtoMed's certified anesthesia billing team understands every dimension of this unique reimbursement model: base unit selection, time unit calculation, physical status modifiers, qualifying circumstances, CRNA supervision rules, and payer-specific conversion factors. We submit clean claims, identify time documentation errors before submission, and follow up on every denial so your practice collects the complete reimbursement each case has earned.
Certified Anesthesia Billing Specialists
Every biller on your account holds active AAPC and AHIMA credentials with hands-on experience in anesthesia base unit coding, time unit calculation, physical status modifiers, and payer-specific conversion factor billing.
98%+ Clean Claim Rate
We review every case before submission, verifying time documentation accuracy, confirming physical status modifier selection, checking qualifying circumstance add-ons, and confirming concurrent supervision documentation.
Zero-Friction Access
We securely log into your existing anesthesia information management system (AIMS) or EHR, with zero disruption to your OR scheduling or clinical workflow.
End-to-End Claims Management
From pre-anesthesia eligibility verification and authorization to case billing, denial appeals, and payment posting, we manage your complete anesthesia billing cycle.
Proactive Denial Management
Every rejected claim is investigated, corrected, and resubmitted. We recover anesthesia revenue lost to time unit disputes, modifier omissions, and CRNA supervision documentation gaps.
Transparent Financial Reporting
Monthly reports and real-time billing data give you a clear view of your revenue per case, unit-level reimbursement rates, denial patterns, and overall financial performance by payer and procedure type.
Coding Expertise
Anesthesia Coding Expertise That Reduces Denials
Anesthesia billing uses a unique base-unit-plus-time-unit reimbursement model with physical status modifiers, qualifying circumstance codes, and CRNA supervision rules, each affecting reimbursement on every case. Our certified coders know every element of anesthesia billing precision.
ASA 00100–01999
Anesthesia base codes: procedure-specific base units by surgical site and procedure type.
Time Units (15 min)
Anesthesia time billing: base plus time unit calculation with exact start/stop documentation.
Modifier P1–P6
Physical status modifiers: patient complexity classification affecting unit reimbursement.
CPT 99100–99140
Qualifying circumstance add-on codes: age extremes, emergency conditions, OB anesthesia.
Modifier QK / QX / QY
CRNA supervision modifiers: medical direction rules for 1 to 4 concurrent cases.
CPT 01958–01969
Obstetric anesthesia: vaginal delivery, C-section, and epidural placement coding.
CPT 00500–00952
Regional anesthesia and nerve blocks: thoracic, spinal, epidural, and plexus procedures.
Specialized Billing Services
Specialized Billing for Every Anesthesia Service
Anesthesia billing demands unit-level precision, accurate physical status modifier application, correct concurrent supervision documentation, and payer-specific conversion factor calculations on every case. ProtoMed's certified team ensures every anesthesia claim is billed at its complete, compliant value.
Base Unit + Time Unit Calculation
Every anesthesia claim is calculated by adding the procedure-specific base units to the time units earned, one unit per 15 minutes of continuous anesthesia care, with partial units rounded per payer rules. Start and stop time documentation must match the calculated units exactly. We verify time unit calculations against documented anesthesia start and end times on every case and correct calculation errors before submission.
Physical Status Modifier Billing
Physical status modifiers (P1 through P6) classify patient complexity and, for P3 and above, add units to the base reimbursement. P3 adds one unit, P4 adds two, and P5 adds three, and for emergency cases, modifier -E adds an additional unit. The physical status assigned must be supported by the pre-anesthesia evaluation documentation. We confirm physical status modifier accuracy on every case and ensure the supporting documentation is in place before submission.
CRNA Supervision & Concurrent Case Billing
When an anesthesiologist medically directs CRNAs in concurrent cases (up to four simultaneous cases), specific QK, QX, and QY supervision modifiers must be applied correctly to both the physician and CRNA claims. The physician's reimbursement is split at 50% for medical direction. Incorrect modifier application on concurrent cases results in denied or underpaid claims. We accurately apply supervision modifiers and coordinate billing between physician and CRNA claims for every concurrent case encounter.
Qualifying Circumstance Billing
Qualifying circumstances: emergency conditions (99140), extreme age (99100), controlled hypotension (99135), and obstetric anesthesia (99100), each add units to the base reimbursement and must be documented in the pre- or intra-operative record. These add-on codes are frequently missed by billing teams that are not trained in anesthesia-specific coding. We identify and bill every qualifying circumstance on every eligible case, capturing the additional reimbursement your practice has earned.
Obstetric Anesthesia Billing
Obstetric anesthesia, including epidural labor analgesia, spinal anesthesia for C-section, and combined spinal-epidural techniques, carries its own ASA code set and unique documentation requirements. When labor epidurals are placed and then converted to surgical anesthesia for emergency C-section, the billing transition must be handled correctly. We accurately code every obstetric anesthesia case and manage the billing complexity of conversion from labor to surgical anesthesia.
Pre-Anesthesia Evaluation & Post-Anesthesia Care
Pre-anesthesia evaluation and post-anesthesia care unit (PACU) management may be separately billable from the primary anesthesia service in certain circumstances. Pre-anesthesia evaluation E/M codes apply when the evaluation is performed on a day prior to the procedure. PACU management involves distinct documentation requirements. We identify every separately billable pre- and post-anesthesia service and ensure the documentation supports each additional claim.
Our Process
How ProtoMed's Anesthesia Billing Process Works
A structured four-step process that ensures every anesthesia case is billed at its correct base unit value, with accurate time documentation, correct physical status modifiers, and complete qualifying circumstance capture.
Practice Audit & Revenue Gap Analysis
We review your current anesthesia billing setup, identify systematic revenue losses from time unit calculation errors, missed physical status modifiers, omitted qualifying circumstances, and incorrect CRNA supervision coding, then securely access your existing AIMS or EHR with zero disruption to your OR operations.
Pre-Anesthesia Eligibility & Authorization
Before each scheduled case, we verify patient coverage and benefits, confirm payer-specific anesthesia billing rules and conversion factors, and identify any prior authorization requirements for elective procedures. Catching eligibility and coverage gaps before the case prevents post-procedure billing disputes.
Case Billing, Unit Calculation & Claim Submission
Our certified anesthesia billers review every case record, verify start and stop time documentation, calculate base plus time units accurately, apply physical status and qualifying circumstance modifiers, confirm CRNA supervision modifier requirements, and scrub each claim before submission. Claims are submitted electronically on time to all major payers.
Denial Management, Payment Posting & Reporting
Every denied claim is investigated and appealed with the documentation required for reversal, including time log evidence for unit disputes and medical record support for physical status modifier challenges. Payments are posted accurately and you receive clear monthly reports on revenue per case, unit reimbursement rates, and denial patterns.
Ready to Get Paid the Full Value of Every Anesthesia Case You Provide?
Let ProtoMed's certified anesthesia billing specialists handle your complete revenue cycle: from base unit selection and time unit calculation to physical status modifier billing, qualifying circumstance capture, CRNA supervision coding, and denial appeals. We'll audit your current billing, identify where your anesthesia revenue is being lost to unit errors and omissions, and start recovering it.
Get your free anesthesia billing audit today. A ProtoMed expert will reach out within 24 hours.