G9538 HCPCS Level II Code: Advanced brain imaging (cta, ct, mra or MRI) was ordered

Contextual Map

Every relationship of G9538 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Nearest codes (40)

• G9516 — Patient achieved an improvement in visual acuity, from their preoperative level, within 90 days of surgery[Sibling]
• G9517 — Patient did not achieve an improvement in visual acuity, from their preoperative level, within 90 days of surgery, reason not given[Sibling]
• G9518 — Documentation of active injection drug use[Sibling]
• G9519 — Patient achieves final refraction (spherical equivalent) +/- 1.0 diopters of their planned refraction within 90 days of surgery[Sibling]
• G9520 — Patient does not achieve final refraction (spherical equivalent) +/- 1.0 diopters of their planned refraction within 90 days of surgery[Sibling]
• G9521 — Total number of emergency department visits and inpatient hospitalizations less than two in the past 12 months[Sibling]
• G9522 — Total number of emergency department visits and inpatient hospitalizations equal to or greater than two in the past 12 months or patient not screened, reason not given[Sibling]
• G9523 — Patient discontinued from hemodialysis or peritoneal dialysis[Sibling]
• and 32 more

Change history (2)

• January 1, 2019 — Removed from the code set [Change history]
• and 1 more

Sources for this page

Every coding fact on this page is read from the datasets below. Nothing is AI-generated; MedCoder-derived relationships and editorial are labelled where they appear.

Code, descriptors, coverage and pricing attributes

CMS HCPCS Alpha-Numeric (ANWEB) release — July 2026 quarterly update

Change history and date-of-service validity

CMS HCPCS quarterly update files, ingested into the change ledger

Comparisons, relationships and the contextual map MedCoder-derived

Derived by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears

All data sources and release dates

Nearest Codes in This Family

Official HCPCS Level II classifications closest to G9538 in its code family, with their registry titles.

• G9533 — Patient with minor blunt head trauma did not have an appropriate indication(s) for a head ct
• G9534 — Advanced brain imaging (cta, ct, mra or mri) was not ordered
• G9535 — Patients with a normal neurological examination
• G9536 — Documentation of medical reason(s) for ordering an advanced brain imaging study (i.e., patient has an abnormal neurological examination; patient has the coexistence of seizures, or both; recent onset…
• G9537 — Imaging needed as part of a clinical trial; or other clinician ordered the study
• G9539 — Intent for potential removal at time of placement
• G9540 — Patient alive 3 months post procedure
• G9541 — Filter removed within 3 months of placement
• G9542 — Documented re-assessment for the appropriateness of filter removal within 3 months of placement
• G9543 — Documentation of at least two attempts to reach the patient to arrange a clinical re-assessment for the appropriateness of filter removal within 3 months of placement