CPT Code 00702: Anesthesia for percutaneous liver biopsy

Key Takeaways

CPT Code 00702 describes anesthesia for procedures on the upper anterior abdominal wall; percutaneous liver biopsy, maintained by the AMA under the CPT code set

The code carries 4.0 base units per the VA Professional Anesthesia Nationwide Base Units Table (v3-27, Table H)

CPT Code 00702 is eligible for Monitored Anesthesia Care (MAC) billing per CMS Article A57361; applicable modifiers include AA, QZ, QK, QX, and QY

Pabau’s claims management software supports anesthesia billing workflows with integrated clinical documentation and audit-ready records

CPT Code 00702 carries the full descriptor: Anesthesia for procedures on upper anterior abdominal wall; percutaneous liver biopsy. It sits within the broader upper abdomen anesthesia range (00700-00797), maintained by the American Medical Association (AMA) as part of the CPT code set.

The semicolon in the descriptor is clinically important. The parent category covers anesthesia for all upper anterior abdominal wall procedures (CPT 00700), while CPT Code 00702 specifically narrows the indication to the percutaneous liver biopsy approach.

When an interventional radiologist or hepatologist performs image-guided needle insertion through the abdominal wall to obtain liver tissue, anesthesia services for that procedure bill under this code.

This code applies regardless of whether the anesthesia type is general, regional, or monitored anesthesia care (MAC), provided the procedure is a percutaneous liver biopsy via the upper anterior abdominal wall. The imaging guidance itself (ultrasound or CT) is billed separately by the proceduralist.

Good practice management software features for anesthesia groups include the ability to separate these concurrent service lines cleanly in the billing record.

CPT Code 00702 vs. CPT 00700

Both codes share the “upper anterior abdominal wall” parent heading, but the distinction matters for correct reimbursement. CPT 00700 covers general surgical procedures on the upper anterior abdominal wall.

CPT Code 00702 is specifically reserved for the percutaneous liver biopsy subtype. Submitting 00700 when the procedure was a liver biopsy is technically a miscoding, even if the anatomical location is correct.

Base units and anesthesia modifiers for CPT Code 00702

Anesthesia reimbursement uses a unit-based formula rather than a flat fee. CPT Code 00702 starts with a base unit value, then adds time units and any qualifying circumstance units before multiplying by the payer’s conversion factor.

Modifier selection depends on who delivers the anesthesia and under what supervision arrangement. Anesthesiologists billing for personally performed services use AA. CRNA-only practices billing without physician direction use QZ. Teams operating under medical direction split between QK (2-4 concurrent cases) or QY (single CRNA directed).

Review the CMS Physician Fee Schedule lookup for current conversion factor values by MAC jurisdiction before calculating expected reimbursement. For a wider walkthrough of anesthesia billing modifiers and conventions, see CPT 00140.

Anesthesia reimbursement calculation for percutaneous liver biopsy

The standard anesthesia billing formula applies to CPT Code 00702 the same way it applies across all anesthesia codes. Per the American Society of Anesthesiologists (ASA) Relative Value Guide and CMS anesthesia billing guidelines, the calculation is:

Reimbursement = (Base Units + Time Units + Modifying Units) x Conversion Factor

For CPT Code 00702, the base unit value is 4.0. A 45-minute percutaneous liver biopsy produces 3 time units (45 / 15). With no qualifying circumstance modifiers, total units equal 7.0.

Multiply by the payer’s conversion factor to reach the payment amount. Medicare conversion factors vary by geographic locality. Use the FastRVU 2026 RVU lookup tool to confirm current values for your jurisdiction.

MAC billing considerations

CMS Article A57361 explicitly lists CPT Code 00702 as eligible for Monitored Anesthesia Care billing. When MAC is medically appropriate rather than general anesthesia, the claim still uses CPT 00702 as the procedure code. Payers may require supporting documentation that general anesthesia was not medically indicated and that MAC met the clinical criteria for the encounter.

Modifier G8 does not apply to CPT Code 00702. Per CMS Article A57361, G8 is limited to CPT 00100, 00300, 00400, 00160, 00532, and 00920.

For CPT Code 00702 MAC claims, the applicable qualifying-circumstance modifier is G9, “history of severe cardiopulmonary disease,” when the patient’s condition supports it. Good EHR integration for billing ensures the MAC justification notes are captured in the same record as the anesthesia service, which reduces documentation request cycles at audit.

Documentation requirements for anesthesia claims

Denied anesthesia claims often trace back to incomplete encounter documentation rather than wrong codes. For percutaneous liver biopsy anesthesia billed under CPT Code 00702, every claim needs a set of core documentation elements.

• Pre-anesthesia evaluation: Completed before the procedure begins; documents the patient’s medical history, ASA physical status classification, and planned anesthesia approach
• Informed consent: Signed and dated, specific to the anesthesia services planned (separate from the proceduralist’s consent for the biopsy itself)
• Anesthesia time record: Accurate start and stop times for billable anesthesia time; discrepancies between the OR log and the claim are a top audit trigger
• Intraoperative monitoring notes: Continuous recording of vital signs throughout the procedure
• Post-anesthesia care unit (PACU) notes: Documentation of the patient’s transfer out of anesthesia care
• Attestation of personally performed service (when modifier AA is billed) or co-signature confirming CRNA supervision level (when QK or QY is billed)

Using digital clinical documentation forms reduces transcription errors and ensures pre-anesthesia evaluation fields are completed before the patient enters the procedure room. Structured templates that flag incomplete fields prevent claims from going out with missing time entries or absent ASA classification.

Robust patient care management documentation practices keep audit trails intact and accessible for payer reviews. For practices thinking through their broader documentation stack, reviewing medical forms for practices is a useful starting point.

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ICD-10 codes supporting CPT Code 00702 medical necessity

Every anesthesia claim requires a supporting diagnosis code that establishes medical necessity. CMS Article A57361 provides the ICD-10-CM code list that supports coverage for CPT Code 00702. The most commonly submitted diagnosis codes for percutaneous liver biopsy anesthesia fall into hepatic disease and related systemic categories.

These codes reflect the most common clinical scenarios driving percutaneous liver biopsy. The diagnosis code submitted should match the ordering physician’s documented indication, not the anesthesiologist’s assessment.

Anesthesia practices that rely on HIPAA compliance for practices will confirm that diagnosis sharing between the proceduralist and anesthesia provider follows appropriate authorization protocols before the claim is assembled. Practices can adapt our HIPAA privacy policy template to formalize these authorization protocols.

Related anesthesia CPT codes and billing workflow

CPT Code 00702 sits in a cluster of upper abdominal anesthesia codes. Knowing the adjacent codes prevents miscoding when the procedure differs from a straightforward percutaneous liver biopsy.

CPT 00700 and CPT Code 00702 carry the same 4.0 base units, so there is no unit-value penalty for choosing the wrong one. What matters is specificity: CPT 00700 applies to general upper anterior abdominal wall surgery, while CPT Code 00702 is reserved for the percutaneous liver biopsy approach.

The operative note, not the anesthesia record, determines which code is correct.

Step-by-step billing workflow

1. Confirm the procedure code: Verify the proceduralist’s operative note describes a percutaneous liver biopsy via the upper anterior abdominal wall, not a laparoscopic or open surgical approach (which use different codes)
2. Select CPT Code 00702 and attach the appropriate anesthesia modifier (AA, QZ, QK, QX, or QY) based on the supervision arrangement
3. Calculate total units: Add 4.0 base units plus time units (anesthesia minutes / 15) and any qualifying circumstance units
4. Attach the ICD-10 diagnosis code matching the ordering physician’s documented indication for the biopsy
5. Review MAC documentation if applicable: confirm the anesthesia record includes clinical justification for MAC rather than general anesthesia
6. Submit the claim through your claims management software and track the remittance for denial codes related to modifier or diagnosis mismatches

Anesthesia practices that track denial patterns by CPT code can identify whether CPT Code 00702 claims are being downcoded, pended for documentation, or denied for medical necessity. That analysis requires structured reporting by procedure code, which is easier when the billing system links the CPT code to the encounter record rather than treating it as a standalone line item.

Reviewing HIPAA compliance checklist requirements alongside claim submission workflows ensures that documentation shared between care teams during this process meets privacy standards. Practices building out their administrative infrastructure can also benefit from exploring medical practice management software that connects clinical documentation to billing in a single platform.

Conclusion

CPT Code 00702 is a precise code for a specific procedure: percutaneous liver biopsy anesthesia through the upper anterior abdominal wall. Getting it right means selecting the correct modifier for the supervision arrangement, calculating units accurately from a 4.0 base, and matching the ICD-10 diagnosis to the ordering physician’s documented indication.

Pabau’s claims management tools and integrated digital documentation help anesthesia groups and surgical facilities keep billing records, clinical notes, and compliance documentation connected in one system. To see how those workflows support anesthesia billing specifically, book a demo with the Pabau team.

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