A service interval around the operation

Read an original fictional chart, identify the supported facts, and explain your coding workflow.

Chart gym · Original fictional record

Service date: 2026-09-09 · Medicare anesthesia professional service

Use your code books and write your reasoning before opening the walkthrough. This exercise contains no real patient information.

Patient and procedure

Original fictional record. Denise Carter, age 68, is scheduled for left-knee arthroscopy with partial medial meniscectomy on September 9, 2026. The surgeon’s completed report confirms the planned left-sided intervention. This is an outpatient professional anesthesia claim under Original Medicare. The anesthesiologist’s record and operative report carry the same patient identifier, date and side.

Pre-anesthesia assessment

At 07:40 the anesthesiologist completes a routine twelve-minute assessment. The note records treated hypertension, no new cardiopulmonary symptoms and an ASA II classification assigned after today’s evaluation. The signed plan is general anesthesia. The anesthesiologist will personally provide the service alone; no CRNA, anesthesiologist assistant or teaching arrangement is involved. The record supplies no separate preoperative consultation.

Anesthesia and operative log

08:12: the anesthesiologist begins preparing the patient for anesthesia in the operating room. 08:29: the surgeon begins the intervention. 09:04: surgical closure is complete. The anesthesiologist continues caring for the patient during emergence and transfer. At 09:18 the handoff records that the patient can safely be placed under postoperative care. The anesthesiologist documents continuous qualifying care from 08:12 through 09:18, with no interruption, separately reported procedure interval or care of another patient.

Postoperative note

The handoff identifies the recovery clinician accepting care. A later routine anesthesia follow-up records no new separately furnished service. The billing worksheet incorrectly starts the anesthesia interval at incision and also proposes adding the earlier assessment. Reconcile those entries against the signed care log.

Abstraction task

Determine actual anesthesia minutes for the Medicare claim field and calculate the corresponding time units. Use the completed operation and documented role to navigate your authorized anesthesia reference. The exercise scores time abstraction; it supplies no actual base value or locality conversion factor from which to calculate a real payment.

Your coding worksheet

Identify the beginning and end of anesthesia time.
Separate the ordinary earlier assessment and surgical timestamps.
Calculate actual minutes and the stated Medicare time units.
List the remaining evidence for final service, role and payment review.

In your notebook, record the supported facts, your index route, the instructions you checked, and any missing detail that limits your answer.

Compare with the worked explanation

Use 08:12–09:18: sixty-six minutes of continuous qualifying anesthesia care.
The twelve-minute usual pre-anesthesia assessment is not automatically added. Incision and closure describe the surgical interval, not the anesthesia interval.
66/15 = 4.4 calculated time units; retain sixty-six actual minutes for the stated claim field.
Verify the completed operation, authorized anesthesia entry, documented roles and applicable fee inputs before any complete claim or payment conclusion.

Reference sections: Chapter 12 50.G; NCCI II B.3

Practice the linked chart questions