CPT code 01962: Anesthesia for urgent hysterectomy following delivery

Key Takeaways

CPT code 01962 describes anesthesia services for urgent hysterectomy following delivery, classified under obstetric anesthesia codes 01958-01969.

The code carries 8 base units per the Massachusetts Medicaid schedule; always verify against the current ASA Relative Value Guide and payer contract.

Modifier selection (AA, QK, QX, QY, QZ) determines whether an anesthesiologist or CRNA is billing and whether supervision applies, directly affecting reimbursement.

Practice management software like Pabau helps OB/GYN practices track anesthesia billing documentation, modifier use, and encounter-level audit trails.

CPT code 01962 covers anesthesia for an urgent hysterectomy performed after delivery, typically because of postpartum hemorrhage, uterine rupture, or placenta accreta spectrum. OB/GYN practice management software needs to capture this encounter carefully, since the hysterectomy anesthesia record has to stand apart from any labor anesthesia that came before it.

This reference covers the official code description, base unit value, time-based reimbursement calculation, applicable modifiers, ICD-10 pairing, and documentation requirements that affect how this code is reviewed by Medicare and commercial payers.

CPT code 01962: definition and clinical description

CPT code 01962 is defined by the American Medical Association (AMA) as: Anesthesia for urgent hysterectomy following delivery. It sits within the obstetric anesthesia range 01958-01969 and is specifically for cases where a hysterectomy becomes necessary after a vaginal or cesarean delivery, typically due to postpartum hemorrhage, uterine rupture, or placenta accreta spectrum.

The word “urgent” is clinically and procedurally significant. This is not a scheduled hysterectomy (which would use a different anesthesia code). The patient has just completed labor and delivery, and the surgical team has determined that immediate hysterectomy is necessary to control life-threatening complications.

When CPT 01962 applies

The code applies when:

• Delivery has occurred (vaginal or cesarean)
• A hysterectomy is performed urgently in the same or an immediately subsequent operative episode
• The anesthesiologist or CRNA provides general or regional anesthesia for the hysterectomy phase
• The anesthesia provider documents continuous presence and time from induction through case completion

For a planned cesarean hysterectomy with no preceding labor analgesia, use CPT 01963 instead. The distinction matters: 01962 implies a prior delivery event, while 01963 does not. More on this comparison appears in the section below on 01962 vs 01963.

ICD-10 diagnosis codes commonly paired with CPT 01962

Payers require a supporting ICD-10-CM diagnosis code to establish medical necessity. Conditions most frequently driving urgent postpartum hysterectomy include:

Complications identified after the immediate postpartum period may also warrant O90.9. Always verify the primary diagnosis against current CMS ICD-10-CM guidelines before coding.

Base units and time units for urgent hysterectomy anesthesia

Anesthesia billing uses a unit-based formula rather than a flat fee for most codes. CPT code 01962 is no exception. The total billable units combine base units (fixed, code-specific) and time units (variable, based on case duration).

The standard reimbursement formula is: (Base Units + Time Units + Physical Status Units) x Conversion Factor = Allowed Amount. The conversion factor varies by payer and geographic area. Use the CMS Physician Fee Schedule lookup to verify current Medicare anesthesia conversion factors by locality. For RVU-based estimates, the FastRVU 2026 lookup tool provides current unit values.

When 01967 precedes 01962 in the same encounter

A common billing question arises when a labor epidural (CPT 01967) transitions into an urgent hysterectomy. The correct approach: Bill CPT 01967 as a flat fee for the labor analgesia phase, then bill CPT 01962 separately for the hysterectomy, with time units starting from the point the hysterectomy anesthesia begins.

Do not merge the two encounters into a single code. Payer-specific guidance from CMS and your contract should govern this sequencing.

Modifier requirements for obstetric anesthesia billing

Anesthesia modifiers determine who performed the service and under what supervision arrangement. Submitting the wrong modifier is one of the most common reasons anesthesia claims are denied or downcoded. The table below covers the modifiers used with obstetric anesthesia codes including CPT 01962.

For emergency obstetric cases, AA is most common when the anesthesiologist is personally present throughout. In team care models, QK paired with QX are used simultaneously. The AAPC Codify CPT reference provides additional modifier guidance for the obstetric anesthesia range.

Physical status modifiers (P1-P6) are appended separately. Urgent postpartum hysterectomy often qualifies for P3 (patient with severe systemic disease) or P4 (patient with severe systemic disease that is a constant threat to life). Some payers add 1-2 units per physical status level above P1; verify with each payer before submitting.

Calculating reimbursement for anesthesia services

Understanding how the formula works helps billing staff catch errors before claims go out. For CPT 01962 with 8 base units and a 90-minute case using the 15-minute increment standard:

• Time units: 90 minutes / 15 = 6 time units
• Total units: 8 (base) + 6 (time) = 14 units
• Allowed amount: 14 units x payer conversion factor

The Medicare anesthesia conversion factor is updated annually by CMS and varies by geographic locality. Commercial payer contracts negotiate their own conversion factor, often expressed in dollars per unit. Practices should verify the contracted rate before calculating expected reimbursement.

For Medicaid billing, state-specific fee schedules apply. Massachusetts Medicaid confirms 8 base units for CPT 01962. Medi-Cal (California Medicaid) and New York eMedNY each publish their own anesthesia provider manuals with separate unit values and documentation requirements. Always cross-reference against your state’s current published schedule, not a third-party estimate.

Wellpoint Washington excludes CPT codes 01962-01966 and 01969 from its 360-minute time cap rule. Standard Wellpoint policy caps reimbursement at 360 minutes of anesthesia time for most procedures, but obstetric emergency codes receive no such ceiling, recognizing the unpredictable duration of these cases.

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CPT code 01962 vs CPT code 01963: When each applies

The single most common coding error in this area is applying CPT 01963 when CPT code 01962 is correct, or vice versa. The codes share the same base unit value but describe different clinical scenarios.

The practical test: Has delivery already occurred, and did the hysterectomy become urgently necessary as a complication of it? If so, CPT code 01962 applies, whether or not the patient received labor analgesia beforehand. CPT code 01963 applies only when the hysterectomy is planned alongside a cesarean delivery, with no labor analgesia or anesthesia care preceding it.

Both codes sit in the New York eMedNY obstetric anesthesia schedule. The emedny.org provider manual lists CPT 01962 as “Anesthesia for urgent hysterectomy following delivery” and CPT 01963 as “Anesthesia for cesarean hysterectomy without any labor analgesia/anesthesia care,” confirming that timing relative to delivery, not the presence of labor analgesia, is what separates the two codes.

For related specialty CPT coding references, see also IVF CPT codes, which covers reproductive procedure anesthesia and surgical billing.

Documentation requirements for emergency obstetric anesthesia

Emergency cases create documentation pressure. The anesthesia team is focused on patient safety, and the billing record often gets completed retrospectively. For CPT code 01962 specifically, several documentation elements are non-negotiable for payer review.

Required elements for CPT 01962 claims

• Anesthesia start and stop times recorded to the minute, separate from the delivery encounter
• Pre-anesthesia evaluation documenting patient status, allergies, and procedure plan (even abbreviated for emergencies)
• Provider identity and role supporting the modifier selected (AA, QX, QZ, etc.)
• ICD-10 diagnosis codes matching the clinical indication for hysterectomy (see table above)
• Hysterectomy consent form copy when billing Medi-Cal; Medi-Cal requires this for CPT codes 00846, 00848, 00944, 01962, 01963, and 01969
• Postoperative note confirming the urgency of the procedure and the anesthesia provider’s continuous presence

Medi-Cal’s requirement for a hysterectomy consent form is specific and enforced at the claim review level. Missing this form results in denial regardless of coding accuracy. Practices using pelvic health software to manage hysterectomy-related billing in California should build the consent form requirement into their pre-operative checklist for all hysterectomy-related anesthesia codes.

Good documentation practice also supports HIPAA-compliant documentation practices across the entire encounter record. Using digital anesthesia consent forms ensures the hysterectomy consent is captured, timestamped, and retrievable for any payer audit without relying on paper-based filing.

Payer-specific considerations

Beyond Medi-Cal, these payer-specific rules apply:

• Highmark BCBS: includes CPT 01962 in its listed obstetric anesthesia codes alongside 01967, confirming time-based billing applies
• Wellpoint Washington: CPT 01962 is explicitly excluded from the 360-minute cap; providers must still submit additional documentation if requesting reimbursement for time beyond 360 minutes in dispute
• New York eMedNY: lists 01962 in the physician procedure codes section under anesthesia obstetric procedures, confirming Medicaid coverage with standard anesthesia billing rules
• Massachusetts Medicaid: confirms 8 base units for CPT 01962 on the state’s published anesthesia service codes spreadsheet effective August 1, 2021

Commercial payers not listed above should be verified against their published anesthesia billing policies. When a difficult labor precedes the encounter, O66.1 and O74.7 often appear on the same claim and should be cross-checked against the anesthesia record before submission.

Conclusion

CPT code 01962 is a narrow, high-stakes code. It applies when urgent hysterectomy follows a delivery, carries 8 base units, and requires precise modifier selection, accurate time documentation, and, in Medi-Cal cases, a hysterectomy consent form.

The distinction from CPT 01963 comes down to timing, not analgesia: 01962 applies once delivery has already occurred, while 01963 is reserved for a planned cesarean hysterectomy with no labor analgesia beforehand. Confirm which scenario applies before the claim goes out.

Practices billing obstetric anesthesia consistently need clean encounter documentation and billing workflows that handle modifier logic without manual intervention. Pabau’s claims management software supports encounter-level audit trails, modifier tracking, and structured form capture for exactly these scenarios. To see how it fits your OB/GYN or anesthesia billing workflow, book a demo.

Continue your research

Managing obstetric and reproductive procedure billing? IVF CPT codes covers procedure coding across reproductive medicine including billing for complex multi-step encounters.

Coding a complicated labor before it escalates to the OR? O62.4 covers the uterine contraction patterns that often precede an urgent surgical intervention like this one.

Looking to improve form capture and documentation compliance? Digital forms helps practices collect, store, and retrieve consent documentation with a full audit trail for payer review.

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