AAPC CPC - Certified Professional Coder (CPC) Exam

55970 = Female-to-male sex transformation

55980 is for male-to-female transformation

Unlisted codes (58999, 55899) are not used when a specific CPT® code exists

Procedure Coding:

72158 – MRI, lumbar spine; without contrast, followed by with contrast

Single comprehensive code

Diagnosis Coding:

M54.42 – Low back pain with sciatica, left side

Why Other Options Are Incorrect:

B / C – Incorrectly unbundling MRI codes

D – Coding additional unspecified low back pain is inappropriate

The code 99471 is used for initial inpatient neonatal critical care, per day, for the evaluation and management of a critically ill infant or young child. Given the scenario where a 4-year-old critically ill child is admitted to the PICU and requires intensive care management, this code is appropriate as it reflects the critical care provided beyond the emergency department services. References: CPT® Professional Edition (current year), AMA.

The key phrase is“wedge excision of the skin of the nail fold”with removal of a wedge-shaped portion ofsoft tissueat the nail margin. This describesexcision of the nail and nail matrixprocedures used for ingrown toenails when the nail margin and/or matrix is treated more definitively than a simple avulsion. CPT11765is used forwedge excision of skin of nail fold(the classic code for the wedge excision approach). By contrast,11730representssimple avulsion of the nail plate(removal of nail plate), which does not match a wedge excision of the nail fold soft tissue.11750describesexcision of nail and nail matrix(more matrix-focused wording) and is a common distractor; however, the vignette specifically emphasizes wedge excision of thenail fold.11755relates to nail procedures that do not match this scenario. The “TA” modifier indicatesleft great toefor anatomical specificity on the claim.

The patient was critically ill withhemodynamic instability, respiratory failure progression, and cardiac arrest, requiring intensive interventions (multiple IVs, large bolus,vasopressor infusion, resuscitation with CPR/defibrillation/medications, ABG management). The provider documents77 minutes of continuous critical care time. Critical care is reported with99291for thefirst 30–74 minuteson a date of service, and99292foreach additional 30 minutesbeyond that threshold. Because77 minutesexceeds 74 minutes, you report99291 + 99292(one unit of 99292 covers the additional time beyond the initial critical care window). You donotadditionally report an ED E/M code (e.g., 99285) on the same date for the same provider when critical care encompasses the ED evaluation and management during that time period; the critical care service is the appropriate E/M reporting. The scenario supports that critical care criteria are met: high probability of life-threatening deterioration and active physician management. Therefore, the correct E/M coding is99291, 99292.

CPT70450describes aCT of the head/brain without contrast. When aradiology facilityperforms the technical portion (scanner, technologist, supplies) and theprovider only interprets and reportsthe study, the provider bills theprofessional componentusing modifier-26. That is exactly what the vignette describes: the radiology facility performed the scan, and the provider received images and provided the interpretation—so the provider reports70450-26. Reporting70450alone would imply billing the global service (professional + technical), which would be incorrect because the provider did not supply the equipment/technical resources. Modifier-TCis used to bill thetechnical component, which would be reported by the facility, not the interpreting provider in this scenario. Modifier-26-TCtogether is not appropriate because it would contradict itself (professional and technical simultaneously). CPC exam tip: always determinewho performedthe technical work andwho interpreted; then use-26for interpretation-only billing.

C2617 = Implant, sinus, drug-eluting, absorbable

Modifier -79 is used to indicate an unrelated procedure or service performed by the same physician during the postoperative (global) period.

-57 = decision for surgery

-25 = significant, separately identifiable E/M

-55 = postoperative management only

Modifier usage is a high-yield CPC exam topic.

This is aninitial hospital/observation evaluation(first visit during the stay), so the correct code family is theinitial observation/inpatient E/Mlevel. The stem providestotal time = 85 minutesand also statesmoderate MDM. Under current E/M rules, you can select the code based oneither MDM or total time(when time is used, it includes the physician’s qualifying time on that date). The time of85 minutesfits the time range for99223(the highest initial hospital/observation level by time) even if MDM is described as moderate. The prolonged service add-on99418requires meeting the threshold beyond the primary code’s time before it can be added; with 85 minutes, you do not reach the additional increment needed to report 99418. Therefore, you report99223 only. CPC exam tip: when time is explicitly provided and is high, it often drives the level; do not add prolonged time unless the documented time clearly exceeds the primary code’s requirement by the necessary increment.

The adenoids, tonsils, appendix, and spleen are all part of the lymphatic system, which plays a crucial role in immune function and the filtration of pathogens. These organs contribute to the body ' s defense by trapping and eliminating bacteria and other pathogens.

Adenoids and tonsils are lymphatic tissues located in the throat and help prevent infection by filtering pathogens from inhaled or ingested particles.

The appendix contains lymphoid tissue and is thought to play a role in gut immunity.

The spleen filters blood, removing old or damaged blood cells and producing lymphocytes for immune response.

The other options are unrelated:

B. Gastrointestinal: Involved in digestion, but not specifically immune response.

C. Cardiovascular: Involved in blood circulation, not immune response.

D. Nervous: Coordinates sensory and motor functions, unrelated to lymphatic tissue.

Therefore, the correct answer is A. Lymphatic.