AAPC Certified Professional Coder (CPC) — All Questions

Two services are ordinarily bundled under NCCI edits, but on this encounter they were performed at separate sites and are genuinely independent. No more specific modifier applies. Which modifier may be appropriate?

• a.Modifier -59 (distinct procedural service)✓
• b.Modifier -26 (professional component of a service split into professional and technical parts)
• c.Modifier -50 (bilateral procedure performed on mirror-image paired anatomic sites)
• d.Modifier -22 (increased procedural services)

Modifier -59 unbundles services that NCCI normally pairs together when documentation shows a distinct session, site, lesion, or organ system. It should be used only when no more precise modifier (such as anatomical X{EPSU} modifiers -XE, -XS, -XP, -XU) applies. -59 must never be used simply to bypass an edit for reimbursement without clinical justification.

A psychiatrist provides both a medical E/M service and psychotherapy to the same patient during one encounter. How is this reported?

• a.Report the E/M based on MDM and the psychotherapy add-on based on its own separately documented time, with the two work efforts kept distinct✓
• b.Report only the E/M service and disregard the psychotherapy
• c.Append modifier -50 to the psychotherapy code
• d.Report a single combined code that covers both; CPT provides bundled psychiatric codes that encompass the medical evaluation and the psychotherapy in one value, so the E/M and the psychotherapy add-on are never reported separately for the same encounter

Psychotherapy add-on codes are used with an E/M when both services are provided. The E/M is leveled by MDM (time cannot be used because the psychotherapy time is carved out), and the psychotherapy is chosen by its own documented time. The clinician must be able to separate the medical and therapy work in the note.

A nurse administers an influenza vaccine to an established patient in the clinic. What must be coded to fully capture the service?

• a.Only the immunization administration code
• b.A separate E/M visit for each vaccine given
• c.Both the vaccine/toxoid product code and the immunization administration code✓
• d.Only the vaccine/toxoid product code

Immunizations require two codes: the product (the specific vaccine/toxoid) and the administration (how it was given, e.g., percutaneous/intramuscular, with or without counseling for younger patients). Reporting only one undercodes the encounter. A separate E/M with modifier -25 is added only when a significant, separately identifiable evaluation was also performed.

In one encounter a patient receives hydration, a therapeutic injection, and chemotherapy administration. How is the single 'initial' service determined?

• a.Each service is reported with its own 'initial' code
• b.Only one 'initial' service is reported per encounter, chosen by a hierarchy (chemotherapy/complex drug administration ranks above therapeutic, which ranks above hydration), regardless of the order performed✓
• c.Hydration is always designated the initial service
• d.The service performed first chronologically is always the 'initial' service; the initial-versus-subsequent designation in drug-administration coding is assigned purely by the clock, so whichever infusion or injection is started first must be reported as initial even when a higher-ranking chemotherapy service is given later that day

For infusions/injections, only one 'initial' code is reported per encounter (per access site), and it is selected by a hierarchy — chemotherapy/highly complex drug administration outranks therapeutic/prophylactic/diagnostic, which outranks hydration — not by the clock. The remaining services become 'subsequent,' 'sequential,' or 'concurrent.' Applying the hierarchy correctly is a classic Medicine-section skill.

A single-use vial contains more drug than the patient needs, and the unused remainder is discarded. Which modifier reports the wasted amount?

• a.-JW (drug amount discarded/not administered to any patient)✓
• b.-59 (distinct procedural service)
• c.-JZ (zero drug amount discarded)
• d.-22 (increased procedural services)

Modifier -JW documents the amount of a drug drawn from a single-use container that was discarded rather than administered, allowing appropriate reporting of waste. Its counterpart -JZ attests that zero drug was wasted. Neither -59 (unbundling) nor -22 (increased work) addresses drug wastage. Reporting waste accurately with -JW supports compliant single-use-vial billing.

For an ophthalmology encounter, the provider may report:

• a.Only surgical procedure codes
• b.Either the general ophthalmological service (Eye) codes or an office/outpatient E/M code, whichever the documentation supports✓
• c.Only office/outpatient E/M codes, because the Eye codes were deleted
• d.Eye codes plus an E/M for the same encounter as a routine practice; an ophthalmology visit is routinely reported by stacking a general ophthalmological (Eye) service and an office/outpatient E/M code together, capturing both the eye exam and the cognitive work every time

Ophthalmology has its own general ophthalmological service (Eye) codes, but the provider may instead use office/outpatient E/M codes when those better fit the documentation — the coder chooses the family that the record supports for that visit. You generally do not report both an Eye code and an E/M for the same encounter. Recognizing this either/or choice is a Medicine-section nuance.

Chemotherapy administration codes are reported:

• a.As part of the office/outpatient E/M visit
• b.Only when the chemotherapy drug is taken orally
• c.Instead of the chemotherapy drug code
• d.Separately, in addition to the chemotherapy drug (HCPCS 'J') code✓

The administration service (how the chemotherapy is given — e.g., IV push or infusion) and the drug itself are reported separately: an administration code plus the appropriate HCPCS Level II 'J' drug code. Reporting only one undercodes the encounter. The administration is not part of an E/M and is not limited to oral therapy — in fact oral agents are handled differently from infused/injected ones.

The immunization administration codes that include physician/QHP counseling apply to patients:

• a.Only 65 years and older
• b.Only when three or more vaccines are given at the visit
• c.Of any age, as long as a nurse administers the vaccine
• d.Through 18 years of age, when the physician/QHP counsels the patient/family✓

There are two immunization administration families: one set that includes face-to-face counseling by the physician/QHP for patients through age 18, and a general set (any age) used when that counseling is not the physician's/QHP's service. The counseling-inclusive codes are age-restricted (through 18) and require documented provider counseling, not simply a nurse giving the shot.

Constant-attendance (one-on-one) physical medicine and rehabilitation therapeutic procedures are typically reported in:

• a.15-minute (timed) units, applying the substantiated-time rules✓
• b.60-minute units
• c.Units based only on the number of body regions treated
• d.Flat per-session units regardless of the time spent

Many physical medicine/rehab services are 'timed' codes billed in 15-minute units, with the number of billable units determined by the total timed minutes of direct one-on-one contact (following the substantiated-time/8-minute conventions payers apply). This contrasts with 'supervised' modalities that are billed per session. Distinguishing timed from untimed codes is essential to correct unit reporting.

Contemporary cardiac catheterization CPT codes are described as 'bundled.' This means a single code typically includes:

• a.Only the catheter placement, with imaging always reported separately
• b.Catheter placement, the injection procedure, and the imaging supervision/interpretation together✓
• c.The hospital room-and-board charge
• d.The anesthesia and the E/M service for the encounter

Modern cardiac cath codes combine the previously separate components — catheter placement, contrast injection(s), and the imaging supervision and interpretation — into comprehensive bundled codes, reducing the need to stack multiple codes. Anesthesia, E/M, and facility room charges are not part of these procedural codes. Recognizing what a bundled cath code already includes avoids unbundling errors.

A cardiologist provides only the interpretation and written report of a 12-lead ECG that was performed on the hospital's equipment. This is reported with:

• a.Modifier -TC (technical component)
• b.The ECG code with modifier -26 (professional component)✓
• c.Modifier -76 (repeat procedure by the same physician)
• d.The global ECG code with no modifier

A diagnostic ECG can be split like imaging: the tracing/equipment is the technical component (-TC, billed by the facility) and the physician's interpretation and report is the professional component (-26). Since the cardiologist only interpreted the tracing on the hospital's equipment, modifier -26 is correct. Reporting the global code or -TC would misstate what the physician actually did.

In HCPCS Level II, the 'J' code series is used chiefly for:

• a.Durable medical equipment such as wheelchairs, hospital beds, walkers, and home oxygen apparatus dispensed to the patient for long-term use in the home
• b.Drugs administered by injection or infusion (non-oral), including many chemotherapy agents✓
• c.Ambulance and other patient-transport services provided between facilities or to the patient's home
• d.Laboratory panels and other clinical diagnostic bench tests performed on patient blood specimens

J codes report drugs administered other than by the oral route — injectable and infused medications, including many chemotherapy agents — reported in addition to the administration service. The trap is assuming J codes cover DME, oral drugs, or the administration itself; the drug and its administration are separate codes.

The monthly end-stage renal disease (ESRD)-related dialysis capitation codes are selected by:

• a.The number of dialysis machines used during the month and the total volume of dialysate processed for the patient across all sessions at the facility
• b.The patient's age and the number of face-to-face physician visits provided during the month✓
• c.The type of anesthesia administered during each dialysis session over the course of the month
• d.The size of the dialysis facility and the number of licensed stations it operates during the month

The monthly ESRD (dialysis) capitation codes are chosen based on the patient's age group and the number of face-to-face physician visits within the month. The trap is selecting by equipment or facility factors; the code hinges on age and monthly visit count, which reflect the physician's management effort.

A cardiovascular stress test comprises supervision, the tracing, and the interpretation/report. If a physician only supervises the test and provides the interpretation for a test done on facility equipment, the physician should:

• a.Report the global code regardless of who did what; a physician who supervises and interprets a stress test done on facility equipment still bills the complete global service, and the technical component performed by the facility is simply absorbed rather than billed by that facility
• b.Report an E/M service instead
• c.Report only the component(s) the physician actually performed (supervision and/or interpretation and report); the facility bills the technical portion✓
• d.Report nothing at all

Cardiovascular stress testing separates into supervision, the tracing (a technical element), and the interpretation and report. A physician reports only the component(s) actually furnished, while the facility bills the technical portion. The trap is reporting the global service when the physician did not perform every component — that overstates the physician's work.

In the CPT drug-administration hierarchy for a single encounter, the 'initial' service code should reflect:

• a.The service with the shortest infusion time
• b.Whichever drug-administration service happened to be performed first in chronological order during the encounter, regardless of the drug's clinical purpose
• c.The primary reason for the encounter, ranked chemotherapy/complex biologic > therapeutic/prophylactic/diagnostic > hydration✓
• d.Hydration in every case

For infusions/injections, one 'initial' code is chosen per encounter (per IV access site) based on a hierarchy — chemotherapy/highly complex drug or biologic administration ranks above therapeutic/prophylactic/diagnostic administration, which ranks above hydration — regardless of the chronological order performed. Additional services are reported as sequential, concurrent, or add-on.

When multiple infusions/injections occur in one encounter through a single IV site, CPT permits:

• a.No add-on codes at all
• b.One code per hour regardless of substance
• c.Only one 'initial' service code per encounter (per IV access site), with other services coded as sequential, concurrent, or additional-hour add-ons✓
• d.A separate 'initial' service code reported for each different drug that is administered during the encounter, even when they all run through the same single intravenous access line

The infusion rules allow just one initial code per encounter for a given IV access site; subsequent different drugs are 'sequential,' simultaneous drugs are 'concurrent,' and additional time is captured with add-on hourly codes. A separate IV site can justify an additional initial code with an appropriate modifier.

Psychotherapy CPT codes are primarily distinguished by:

• a.The time spent with the patient (selecting the code nearest to the actual time), and whether an E/M service was also provided✓
• b.The type of couch used
• c.The number of family members present only
• d.The patient's psychiatric diagnosis only, with the same code used no matter how long the psychotherapy session actually lasted

Psychotherapy codes are time-based (e.g., 30, 45, 60 minutes), chosen by the time closest to that spent face-to-face. When medical E/M is provided in the same session, the psychotherapy is reported with an add-on code alongside the E/M. Crisis psychotherapy has its own time-based codes.

When a psychiatrist provides BOTH a medical E/M service and psychotherapy in the same session, the correct reporting is:

• a.A single combined psychotherapy code only
• b.An E/M code only
• c.Two separate stand-alone psychotherapy codes
• d.An E/M code plus a psychotherapy add-on code representing the psychotherapy time✓

CPT provides psychotherapy add-on codes to be reported in addition to an E/M service when both are performed and separately documented. The E/M is selected by its own criteria and the psychotherapy add-on reflects only the time spent in psychotherapy, exclusive of the E/M work.

Chiropractic manipulative treatment (CMT) codes are selected by:

• a.The number of spinal regions treated, with active treatment reported using modifier -AT for Medicare✓
• b.The patient's age only
• c.The type of table used
• d.The total face-to-face time of the visit only, without regard to how many spinal regions were actually manipulated

CMT codes are stratified by the number of spinal regions manipulated (e.g., 1-2, 3-4, 5 regions), with a separate code for extraspinal regions. For Medicare, modifier -AT indicates active/corrective treatment (covered) versus maintenance therapy (not covered). Documentation of regions treated drives code selection.

Osteopathic manipulative treatment (OMT) codes are selected based on:

• a.The patient's insurance type
• b.The length of the office note
• c.The number of medications prescribed
• d.The number of body regions treated✓

OMT codes are chosen by how many body regions (e.g., 1-2, 3-4, 5-6, 7-8, 9-10) are treated. A separately identifiable E/M service performed the same day may be reported with modifier -25. Precise documentation of the regions manipulated supports the code level.

Allergen immunotherapy differs from allergy testing in that immunotherapy codes describe:

• a.Pulmonary function testing
• b.Percutaneous, intradermal, or patch diagnostic skin tests used to identify a patient's specific allergic sensitivities
• c.In-vitro laboratory allergy panels
• d.The preparation and/or injection of allergenic extracts for treatment (desensitization), not diagnostic testing✓

Allergen immunotherapy codes cover the therapeutic administration and/or preparation of allergenic extracts (desensitization). Allergy TESTING codes (percutaneous, intradermal, patch, or in-vitro) are diagnostic. Some immunotherapy codes include antigen preparation, so coders must avoid double-reporting the extract.

Moderate (conscious) sedation reported by the same physician performing the procedure is coded based on:

• a.A flat fee regardless of time or age
• b.The patient's age and the intraservice time of sedation, using the moderate-sedation code family✓
• c.The number of sedative medications given only, regardless of the patient's age or the intraservice time involved
• d.The type of procedure's global period

Moderate sedation codes are selected by whether the sedation provider also performed the procedure (or was a second provider), the patient's age (younger than 5 vs. 5 and older), and the intraservice time. Some procedures include sedation inherently and are listed as not separately reportable.

Under the 'timed' therapy code rules (the 8-minute rule) used for many physical-medicine procedures, one 15-minute timed unit generally requires:

• a.At least 8 minutes of the timed service to be furnished✓
• b.At least 20 minutes
• c.Any amount of time greater than zero
• d.A full 15 minutes with no tolerance

For constant-attendance/one-on-one timed therapy codes, the 8-minute rule allows billing one unit when at least 8 minutes (through 22 minutes) of a service are provided, with additional units at defined thresholds. Supervised (untimed) modalities are billed once per session regardless of time.

The therapeutic/prophylactic/diagnostic injection code (e.g., 96372) reports the ADMINISTRATION of a drug; the drug itself is:

• a.Never billable under any circumstance
• b.Reported separately with the appropriate HCPCS Level II 'J' code✓
• c.Reported with an E/M code
• d.Included in the administration code and not billed

The subcutaneous/intramuscular injection administration code covers only the act of administering; the medication is reported separately (usually a HCPCS 'J' code) with correct units. If the injection is given at the same encounter as a significant, separate E/M, modifier -25 supports the E/M.

A complete echocardiography study, versus a limited/follow-up study, generally requires:

• a.A minimum of two hours of continuous cardiac monitoring together with at least one contrast-enhanced acquisition documented in the report
• b.Use of contrast in every case
• c.Only a single view of the heart
• d.Documentation supporting evaluation of all the required anatomic structures/components defined for the complete examination✓

As with 'complete' ultrasound studies elsewhere, a complete echocardiogram requires documentation of the specified structures/elements; a limited or follow-up study evaluates fewer components. Add-on services such as Doppler/color-flow or contrast are reported separately when performed and supported.

Electromyography (EMG) and nerve conduction studies are reported by:

• a.The patient's age only
• b.The duration of the office visit
• c.The specific study performed and the number of extremities/muscles or nerves tested, as defined by the code descriptors✓
• d.A single flat code covering all neurodiagnostic testing performed during the session regardless of the muscles or nerves studied

Needle EMG codes are selected by the number of extremities and specific muscles studied, and nerve conduction study codes by the number of studies performed. When both EMG and nerve conduction are done, code each per its rules; some combinations have designated codes. Precise counting of tested structures is required.

Pulmonary spirometry with a bronchodilator (before-and-after) study is reported based on:

• a.The number of breaths the patient takes during the maneuver and the peak flow value recorded on the spirometry tracing by the technician
• b.The oxygen saturation only
• c.The specific spirometry service performed, including the pre- and post-bronchodilator components as described by the code✓
• d.The total clinic time

Spirometry codes describe the specific pulmonary function measurement; certain codes include pre- and post-bronchodilator administration testing as one service. Coders select based on exactly what components (e.g., flow-volume loop, bronchodilator response) were performed and documented, avoiding double-reporting bundled elements.

A cardiovascular stress test that includes supervision, tracing, and interpretation may be split when different providers perform parts. A physician who provides ONLY the interpretation and report reports the service with:

• a.No modifier, reporting the global service
• b.Modifier -52 (reduced services)
• c.Modifier -26 (professional component)✓
• d.Modifier -TC (technical component)

When a physician provides only the interpretation and written report of a stress test (or other diagnostic service with professional/technical split), modifier -26 reports the professional component. Modifier -TC covers the technical component (equipment, tracing, supervision). Reporting the global code with no modifier requires performing both components.