G9537 HCPCS Level II Code: Imaging needed as part of a clinical trial; or other clinician ordered the study

Contextual Map

Every relationship of G9537 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)

• G9515 — Patient did not require a return to the operating room within 90 days of surgery[Sibling]— CMS HCPCS Level II code set
• G9516 — Patient achieved an improvement in visual acuity, from their preoperative level, within 90 days of surgery[Sibling]— CMS HCPCS Level II code set
• G9517 — Patient did not achieve an improvement in visual acuity, from their preoperative level, within 90 days of surgery, reason not given[Sibling]— CMS HCPCS Level II code set
• G9518 — Documentation of active injection drug use[Sibling]— CMS HCPCS Level II code set
• G9519 — Patient achieves final refraction (spherical equivalent) +/- 1.0 diopters of their planned refraction within 90 days of surgery[Sibling]— CMS HCPCS Level II code set
• G9520 — Patient does not achieve final refraction (spherical equivalent) +/- 1.0 diopters of their planned refraction within 90 days of surgery[Sibling]— CMS HCPCS Level II code set
• G9521 — Total number of emergency department visits and inpatient hospitalizations less than two in the past 12 months[Sibling]— CMS HCPCS Level II code set
• 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]— CMS HCPCS Level II code set
• and 32 more

Change history

• January 1, 2016 — Added to the code set [Change history]— CMS release files (code change ledger)

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, descriptors, coverage and pricing attributes Official source data

CMS HCPCS Alpha-Numeric (ANWEB) release — July 2026 quarterly update Release, file and checksum · Publisher’s page

Change history and date-of-service validity Official source data

CMS HCPCS quarterly update files, ingested into the change ledger Release, file and checksum · Publisher’s page

Comparisons, relationships and the contextual map MedCoder structured relationship

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

Summary and FAQ answers MedCoder explanation

Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Nearest Codes in This Family

Official HCPCS Level II classifications closest to G9537 in its code family, with their registry titles.

• G9532 — Patient had a head ct for trauma ordered by someone other than an emergency care provider or was ordered for a reason other than trauma
• 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…
• G9538 — Advanced brain imaging (cta, ct, mra or mri) was ordered
• 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