CPT 01462: Closed lower leg, ankle and foot anesthesia

Key Takeaways

CPT code 01462 describes anesthesia for all closed procedures on the lower leg, ankle, and foot — a single broad code that applies regardless of which tissue (bone, joint, nerve, or tendon) the closed procedure involves, as long as the approach isn’t arthroscopic.

01462 carries 3.0 base units per the VA Community Care Nationwide Base Units Table H, the same base value as the soft-tissue NOS code 01470 and the open-bone NOS code 01480.

Because 01462 isn’t split by tissue type the way the open-procedure codes in this family are, the most common coding error is reaching for a bone- or soft-tissue-specific code out of habit when the operative report actually documents a closed reduction or manipulation.

Pabau’s claims management feature automates insurer claim submission, validation, status tracking, and reconciliation with invoices and payments — while structured digital intake and consent forms help keep the documentation trail behind a 01462 claim complete and audit-ready.

CPT code 01462 is the anesthesia billing code for closed procedures on the lower leg, ankle, and foot. Its official descriptor, as maintained by the American Medical Association (AMA), reads: Anesthesia for all closed procedures on lower leg, ankle, and foot.

Notice what’s missing compared to its neighbors: 01462 doesn’t carry a “not otherwise specified” (NOS) qualifier tied to a specific tissue type, the way 01470 (soft tissue) and 01480 (bone) do. Instead, the word “all” is doing the work.

01462 is the single, broad code for any closed procedure in this region, whether the surgeon is manipulating bone, reducing a joint, or working around nerves and tendons through a closed approach. In practice, the tissue-type split only kicks in once the procedure becomes open.

The code sits within the anesthesia section of the CPT code set (00100-01999), in the range covering anesthesia for procedures on the lower leg, below the knee (01462-01522). Common procedures billed under CPT code 01462 include:

• Closed reduction of an ankle fracture (lateral, medial, bimalleolar, or trimalleolar) without surgical incision
• A tibial or fibular shaft fracture treated with closed reduction
• A calcaneal or metatarsal fracture treated with closed reduction
• Closed reduction of an ankle or subtalar joint dislocation
• Manipulation under anesthesia for a stiff, malunited, or displaced fracture or joint of the lower leg, ankle, or foot
• Application of a reduction cast or splint that requires anesthesia to hold a displaced fracture in position

How CPT 01462 differs from neighboring codes

Anesthesia for procedures higher up the same limb falls under separate ranges. For instance, CPT 01200 covers hip joint procedures, and CPT 01404 covers knee disarticulation.

01462 does not apply once the approach changes. Arthroscopic procedures of the ankle and foot have their own code, 01464, even though arthroscopy is minimally invasive — CPT carves it out separately because of the distinct technique and equipment involved.

Open procedures on soft tissue fall under 01470 (or the named codes 01472 and 01474), and open procedures on bone fall under 01480. By contrast, a simple cast application, removal, or repair that doesn’t involve a reduction is billed under 01490.

Practices using claims management software with anesthesia code logic built in can flag a potential 01462-vs-sibling mismatch at the point of charge entry, before the claim reaches a payer.

Code details at a glance

The table below summarizes the key reference data for CPT code 01462.

Base units and time-based reimbursement for CPT 01462

Anesthesia codes don’t follow the standard RVU-based fee schedule that governs most surgical and E/M codes. Instead, payment combines a fixed base unit value (reflecting procedure complexity) with time units (reflecting how long anesthesia was administered), then multiplies the total by a conversion factor.

Base unit value

CPT code 01462 carries 3.0 base units, as listed in the VA Community Care program’s Table H. In short, that’s a relatively low value, reflecting that most closed reductions and manipulations in this region are shorter and less complex than the named open procedures nearby.

The table below compares base unit values across the lower leg, ankle, and foot anesthesia family, to help coders confirm they’ve selected the right code before billing.

Time units and the anesthesia reimbursement formula

Payers convert documented anesthesia time into units, typically by dividing total minutes by 15 (Medicare’s standard), though some commercial payers and state Medicaid programs use a different divisor. The formula then runs:

(Base Units + Time Units + Qualifying Circumstance Units) x Anesthesia Conversion Factor = Allowed Amount

Qualifying circumstance add-on codes — 99100 (patient under 1 year or over 70), 99116 (controlled hypotension), 99135 (deliberate hypothermia), and 99140 (emergency conditions) — add base units when the documented conditions apply, but they can’t be billed as standalone codes; they must accompany a base anesthesia code like 01462.

Anesthesia time for CPT code 01462 is documented from the point the provider begins preparing the patient for induction through transfer of care to the post-anesthesia recovery team.

The CMS Physician Fee Schedule publishes the Medicare anesthesia conversion factor annually, and it varies by region. As a result, never cite a fixed dollar amount for 01462 without specifying the calendar year and locality.

Modifiers for CPT code 01462

Modifiers communicate context the base code alone can’t capture. Three categories apply to CPT code 01462: physical status modifiers, qualifying circumstance codes, and provider-type (supervision) modifiers.

Physical status modifiers (P1-P6)

The American Society of Anesthesiologists (ASA) defines six physical status levels. Accordingly, one must accompany every anesthesia claim, including CPT code 01462.

Medicare does not add incremental units for P3-P5 physical status modifiers on CPT code 01462 or any other anesthesia code. Some commercial payers do, however. Therefore, confirm the specific payer contract before assuming a modifier adds units to your calculation.

Supervision and provider-type modifiers (AA, QK, QX, QY, QZ)

These modifiers communicate who provided the anesthesia and under what level of supervision. Per AAPC billing guidance, the correct modifier determines whether the claim processes under the anesthesiologist’s rate or the CRNA’s rate.

Whether a CRNA can bill CPT code 01462 independently depends on state scope-of-practice law and the specific payer contract. In states that have opted out of the Medicare physician supervision requirement, for example, a CRNA may bill independently using modifier QZ.

Where supervision is required, the claim splits between the anesthesiologist (QK) and the CRNA (QX). Verify your state’s opt-out status before configuring billing defaults.

Documentation requirements for CPT code 01462

Clean CPT code 01462 claims depend on documentation that tells the clinical story a payer needs to confirm medical necessity. Three record types carry most of that weight.

The anesthesia record

This is the primary billing support document. It must capture:

• Patient demographics and date of service
• The surgical procedure being performed
• The anesthesia provider’s name and credentials
• Documented start and stop times for anesthesia
• Continuous monitoring data (blood pressure, heart rate, oxygen saturation)
• Drugs administered with doses and times
• Any intraoperative events that affected the anesthesia course

The time entries on this record must match the units billed. For example, a claim for 4 time units on a 01462 procedure requires a record showing 60 minutes of anesthesia time (at the 15-minutes-per-unit rate). Discrepancies are a primary target in payer post-payment audits.

Pre-anesthesia evaluation

This document supports the physical status modifier. When a P3 or higher modifier is appended to CPT code 01462, the pre-anesthesia evaluation must clearly name the systemic condition that justifies the classification.

Vague language (“patient has comorbidities”) will not hold up a P3 modifier under audit. The note should name the condition (uncontrolled diabetes with peripheral neuropathy, peripheral vascular disease, morbid obesity with breathing problems) and explain why it increases anesthesia risk.

Practices that build standard pre-anesthesia evaluation templates into clinical documentation software see fewer P-modifier denials, because the required elements are captured by default rather than left to memory.

Operative report and medical necessity linkage

The surgeon’s operative report confirms what procedure was performed, and CPT code 01462 must match it. If the report documents a closed reduction, a closed manipulation, or application of a reduction cast or splint under anesthesia — on bone, joint, or soft tissue — 01462 is the appropriate anesthesia companion code, provided the approach was truly closed.

Documenting an arthroscopic approach instead means 01464 applies. An open incision to soft tissue points to 01470 (or the named codes 01472 and 01474), while an open approach to bone calls for 01480 instead.

Maintaining HIPAA-compliant clinical documentation across the anesthesia record, pre-evaluation note, and operative report is the foundation of a solid 01462 claim — all three documents should tell the same story about the approach used. If a closed reduction site later needs treatment for wound dehiscence, that’s billed separately under CPT 12020, not folded into the 01462 anesthesia claim.

Keep the documentation behind every anesthesia claim audit-ready

Pabau’s digital intake, consent, and clinical documentation tools help surgical and anesthesia practices capture a complete pre-op and operative record, so the paper trail behind a claim like CPT 01462 holds up under payer review.

Book a demo

Reimbursement considerations for CPT code 01462

Reimbursement for CPT code 01462 varies by payer, region, and contract terms — no single dollar figure applies everywhere.

Medicare and VA reimbursement

Medicare calculates anesthesia payment using its own conversion factor, published annually in the CMS Physician Fee Schedule, multiplied by total units (base plus time plus any qualifying circumstances). However, Medicare does not add extra payment for P3-P5 physical status modifiers on 01462 or any other anesthesia code — they’re required for documentation purposes, not reimbursement.

The VA Community Care program uses Table H base unit values, confirming CPT code 01462 at 3.0 base units. VA reimbursement rates differ from Medicare and commercial rates. Therefore, providers seeing Veterans Administration patients should check current VA conversion factors through their VA Community Care contract or provider representative.

Commercial payer considerations

Some commercial payers do reimburse additional units for physical status modifiers. Therefore, confirm modifier reimbursement terms in each payer contract rather than assuming Medicare’s rules apply everywhere.

Because 01462 is used so frequently for fracture and dislocation reductions performed in an emergency setting, qualifying circumstance code 99140 (emergency conditions complicating anesthesia) shows up on a meaningful share of 01462 claims. Confirm the emergency circumstance is documented in the anesthesia record before appending it.

Common denial reasons for 01462 claims

Based on standard anesthesia billing patterns, the most frequent denial drivers for CPT code 01462 include:

• Wrong code selection: the operative report describes an arthroscopic (use 01464) or open (use 01470-01486) procedure, but 01462 was billed instead
• Time unit discrepancy: billed time doesn’t match the anesthesia record timestamps
• Missing or unsupported physical status modifier: P3 or higher appended without corresponding pre-evaluation documentation
• Provider modifier error: a CRNA modifier applied without the required supervision documentation on file
• Incorrect ICD-10 pairing: the diagnosis code doesn’t support medical necessity for a closed reduction or manipulation
• Bundling edits: 01462 billed alongside a code that NCCI edits consider included

ICD-10 codes commonly paired with CPT 01462

Every anesthesia claim requires a supporting ICD-10-CM diagnosis code that shows medical necessity for the procedure. Because 01462 covers closed reductions and manipulations across bone, joint, and soft tissue, the paired diagnosis should reflect a fracture, dislocation, or other condition of the lower leg, ankle, or foot that’s consistent with a closed — not open — treatment approach.

Always select the ICD-10-CM code that matches the procedure performed and the patient’s documented condition. The laterality character (right vs. left) and encounter type (initial vs. subsequent) must match the clinical documentation.

A claim for 01462 paired with a diagnosis that’s only treated by an open approach in this practice’s standard protocol will get extra payer review — the diagnosis and the documented treatment approach both have to support a closed procedure.

Ankle sprains coded under S93.401A often continue into a course of care with physical therapy practices once the acute anesthesia episode ends, so the same patient record may carry both a 01462 claim and a separate plan of care.

Related CPT codes for lower leg, ankle, and foot anesthesia

Selecting the wrong code from the lower leg, ankle, and foot anesthesia series is one of the most frequent 01462 errors, usually because 01462’s breadth makes it an easy default.

Review the adjacent codes before assigning 01462, since a more specific arthroscopic or open code always takes priority once the approach stops being closed. The AAPC Codify CPT code search is a practical reference for checking code placement within this section.

What matters most for 01462 is approach, not tissue type: it applies whenever the procedure is closed — no arthroscopic portal, no open incision — regardless of whether the target is bone, a joint, or soft tissue.

Once the approach changes to arthroscopic or open, a different, more specific code takes over. Coding to the approach and level of detail the documentation supports is the same principle that governs anesthesia coding across the rest of the CPT anesthesia section.

Coders and anesthesiologists who want a cross-reference lookup can use the AAPC Codify CPT code search to review the full 01462-01522 range with clinical descriptors. In addition, checking code selection against the AMA coding resources page for the current code year keeps it in line with any annual CPT updates.

Common billing mistakes with CPT code 01462

Anesthesia claims for closed lower leg, ankle, and foot procedures carry a distinct pattern of errors. Each mistake below has a direct cost: underpayment, denial, or having the payment clawed back after an audit.

• Defaulting to 01462 out of habit: billing 01462 when the operative report actually documents an arthroscopic procedure (01464) or an open incision (01470-01486) understates the case and misrepresents the approach used.
• Wrong physical status modifier: assigning P1 to a patient with documented comorbidities because it “seems simpler” doesn’t match the anesthesiologist’s pre-op assessment and creates an audit target.
• Missing anesthesia time: failing to record start-to-stop time in minutes means the time-unit calculation can’t be verified against the anesthesia record.
• Diagnosis-procedure mismatch: pairing 01462 with a diagnosis code that doesn’t support a closed treatment approach is a common trigger for NCCI edit rejections.
• Mismatched supervision modifier: billing QZ (CRNA without supervision) in a state where supervision is required creates a false claim risk.

Sports medicine and orthopedic practices handling a high volume of closed fracture and dislocation reductions, many of which happen on an urgent or same-day basis, benefit from streamlined surgical scheduling that links pre-operative assessment documentation to the billing workflow, so a missing element doesn’t turn into a denial after the procedure is already complete.

Pabau and anesthesia documentation workflows

Surgical practices billing CPT code 01462 deal with a documentation chain that touches multiple people: the anesthesiologist or CRNA, the surgical scheduler, and the billing specialist. When that documentation lives in disconnected systems — paper pre-op forms, a separate scheduling tool, notes typed up after the fact — missing time units and mismatched modifiers become far more likely.

Practice management software like Pabau brings pre-operative intake, consent forms, and clinical documentation into one patient record, so the anesthesia team, the surgeon, and the billing specialist are working from the same source rather than re-keying details between systems.

Pabau’s claims management feature automates insurer claim submission, checks required fields like membership and authorization numbers before a claim goes out, tracks each claim’s status on a central dashboard, and matches payments against invoices and patient records automatically once an insurer pays.

That’s a different job from US CPT modifier logic or multi-provider NPI tracking, which Pabau doesn’t run. Therefore, US anesthesia and surgical billing teams will still need dedicated coding software or a billing partner for the modifier and NPI side of a 01462 claim.

Where Pabau helps directly is the documentation trail behind that claim: structured digital intake forms and clinical notes that anesthesiologists and CRNAs can pull straight into the pre-anesthesia evaluation and operative record, instead of rebuilding it from memory at claim time.

Conclusion

Accurate CPT code 01462 billing comes down to three things: confirming the operative report describes a truly closed approach rather than an arthroscopic or open procedure, documenting anesthesia time and physical status in a way that survives payer review, and applying the correct supervision modifier for how the case was staffed.

In short, Pabau’s documentation tools and claims management features address the points where anesthesia billing errors typically start, from pre-op intake through to insurer claim reconciliation. To see how Pabau fits your practice’s workflow, book a demo.

Continue your research

Billing anesthesia for a procedure higher up the body instead? 00220 covers intracranial procedures, including base units and documentation requirements.

Need the anesthesia code for a mastectomy? 00404 covers radical mastectomy procedures, with modifier and reimbursement guidance.

Looking for the anesthesia code for an open hip replacement? 01214 covers open total hip arthroplasty, including base units and paired diagnosis codes.

Billing for an elbow orthosis alongside a reduction? L3762 covers rigid elbow orthosis billing and documentation.

Frequently asked questions

More common questions about CPT code 01462