A use-additional-code note directs the coder to add detail where available; it does not by itself reverse any code-first sequencing requirement; supplementary code for specified detail is not recorded; the evidence points to mutually exclusive diagnoses under Excludes1.

Includes note involves a tabular note that clarifies examples or content of a code category without prescribing sequencing or exclusions; the note describes mutually exclusive diagnoses under Excludes1 instead, changing the applicable classification.

The code-first instruction establishes mandatory sequencing of an underlying disease before a manifestation; choosing the manifestation first can violate the classification convention; this clinical evidence establishes mutually exclusive diagnoses under Excludes1, not underlying etiology preceding manifestation.

Generalized anxiety disorder is not an isolated panic attack or a temporary stress response; classification follows the provider's established diagnosis; the patient record supports diagnosed migraine without prodromal aura rather than the alternative finding of persistent generalized anxiety symptoms with diagnosis.

An unspecified insomnia code is a symptom-disorder classification, different from sleep apnea or parasomnia; more specific etiology needs documentation rather than coder speculation; the operative or visit note documents diagnosed migraine without prodromal aura instead of insomnia without documented specified subtype.

Tension-type headache corresponds to a diagnosed primary tension headache rather than migraine, anxiety, depression, or insomnia; the record specifies diagnosed migraine without prodromal aura. Those details establish different classifications.

NDC identifies the specific drug product and package; it serves a different function from HCPCS billing units and does not itself replace the HCPCS code; the patient record supports reportable discarded single-dose drug remainder rather than the alternative finding of drug product identifier at package level.

JZ indicates no drug wastage for covered products subject to that Medicare reporting requirement; it is not a generic indication of zero drug administered; the controlling finding is reportable discarded single-dose drug remainder, which is distinct from eligible single-dose medication with no waste.

The required element for Modifier UD for state Medicaid drug pricing is a Medicaid-specific drug-pricing identification instead of discarded amount, zero discarded drug, dose-unit calculation, or NDC; what is described is reportable discarded single-dose drug remainder, without evidence for the alternative feature.

Routine dressing change of a healed burn corresponds to ordinary follow-up dressings without active eschar release, excision, grafting, or wound debridement; the record specifies autologous graft used to resurface burn defect. Those details establish different classifications.

Escharotomy relieves constriction by incising burned tissue; it is not the same as removing the eschar or grafting the defect; vascular compromise supports the indication; this clinical evidence establishes autologous graft used to resurface burn defect, not release incision through circumferential burn eschar.

Burn treatment is differentiated by depth, extent, and interventions; routine local wound care is not equivalent to excision of full-thickness eschar; the scenario instead describes autologous graft used to resurface burn defect, without demonstrating dressing management of superficial partial-thickness burn.

Discectomy removes disc material contributing to compression; a laminectomy addresses vertebral bone and a fusion stabilizes motion segments; this clinical evidence establishes substantial laminar removal for spinal decompression, not removal of herniated intervertebral disc material.

This alternative, Percutaneous vertebral augmentation, concerns cement augmentation of a vertebral body rather than spinal discectomy, lamina removal, or fusion; the alternative is not supported by the documented substantial laminar removal for spinal decompression.

Fusion aims for osseous union across spinal levels; hardware alone does not establish that arthrodesis was attempted; document graft placement and levels; the distinction is the record’s substantial laminar removal for spinal decompression versus the alternative of intended fusion between vertebral segments.

Pneumonectomy is complete removal of one lung; its anatomic extent greatly exceeds a wedge, segmentectomy, or lobectomy; the chart records anatomic removal of one lung segment rather than removal of entire unilateral lung.

Wedge resection removes a localized portion without following an entire bronchopulmonary segment; it preserves more parenchyma than lobectomy or pneumonectomy; the reported work involves anatomic removal of one lung segment and does not establish nonanatomic limited lung parenchymal wedge.

In Open surgical lung biopsy without lobar removal, the work centers on limited tissue sampling from lung parenchyma rather than therapeutic wedge resection, segmentectomy, lobectomy, or pneumonectomy; instead, the report records anatomic removal of one lung segment, which supports a different classification.

Drainage treats an acute peritonsillar collection without routinely removing the entire tonsil; an abscess operation and elective tonsillectomy are different procedures; the chart records removal of palatine tonsils rather than incision into purulent peritonsillar collection.

Adenoidectomy addresses lymphoid tissue in the nasopharynx, separate from palatine tonsil removal; documentation must state whether a combined procedure occurred; the distinction is the record’s removal of palatine tonsils versus the alternative of removal of nasopharyngeal adenoids.

Drainage of retropharyngeal abscess involves surgical evacuation of deep retropharyngeal infection rather than peritonsillar drainage or excision/reconstruction of adenoids, tonsils, or uvula; the note describes removal of palatine tonsils instead, changing the applicable classification.

Although Uterosacral ligament vaginal vault suspension may sound adjacent, it denotes support of the vaginal apex by fixation to uterosacral ligaments rather than a mesh sacrocolpopexy, anterior/posterior repair, or incontinence sling; this record documents suburethral support for stress incontinence, which is distinct from that alternative.

Posterior colporrhaphy supports the rectovaginal septum; it differs anatomically from cystocele repair or apical suspension; what was actually documented is suburethral support for stress incontinence, not the different evidence of reinforcement of posterior vaginal wall.

Sacrocolpopexy restores support to the vaginal vault, unlike isolated anterior or posterior compartment plication; surgical approach controls additional detail; to select this alternative the report would need suspension of vaginal apex to sacrum, whereas it identifies suburethral support for stress incontinence.

Instrumental removal of impacted cerumen requires criteria for impaction and procedure; it is not tympanic membrane incision or reconstructive ear surgery; the controlling finding is operative removal of mastoid air cell system, which is distinct from instrumental extraction of impacted ear wax.

Tympanoplasty reconstructs tympanic membrane, with or without ossicular work depending on type; it is more than a temporary drainage incision; what was actually documented is operative removal of mastoid air cell system, not the different evidence of graft repair of perforated tympanic membrane.

Although External auditory canal exostosis removal may sound adjacent, it denotes excision of a bony overgrowth from the external canal, not cerumen extraction, eardrum repair, myringotomy, or mastoid surgery; this record documents operative removal of mastoid air cell system, which is distinct from that alternative.

CT without contrast uses x-ray cross-sectional acquisition without intravenous enhancement; it is distinct from a postcontrast-only or combined pre/postcontrast study; the chart records arterial-phase contrast CT with vessel reconstruction rather than CT imaging with no injected contrast.

A postcontrast-only CT study differs from a combined without-and-with protocol; actual image acquisitions determine the chosen descriptor; the reported work involves arterial-phase contrast CT with vessel reconstruction and does not establish contrast-enhanced CT series only.

In CT enterography with oral enteric distention, the work centers on specialized bowel CT protocol using intestinal distention rather than an ordinary without-, with-, or multiphase intravenous contrast CT designation; instead, the report records arterial-phase contrast CT with vessel reconstruction, which supports a different classification.

Frozen sections provide rapid intraoperative diagnostic guidance; they are distinct from routine permanent-section histology and require documented consultation; the reported work involves epithelial cell specimen prepared for cervical cytology and does not establish immediate intraoperative frozen tissue interpretation.

Surgical pathology evaluates tissue architecture in a submitted specimen, with level based on specimen type and complexity; it differs from cytology of loose cells; what was actually documented is epithelial cell specimen prepared for cervical cytology, not the different evidence of fixed excised tissue examined histologically.

The required element for Flow-cytometric immunophenotyping is analysis of cellular surface marker expression rather than cytology, histologic tissue examination, or frozen-section consultation; what is described is epithelial cell specimen prepared for cervical cytology, without evidence for the alternative feature.