G9437 HCPCS Level II Code: Aspirin not prescribed at discharge

Contextual Map

Every relationship of G9437 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)

• G9417 — Patient did not have one tetanus, diphtheria toxoids and acellular pertussis vaccine (tdap) on or between the patient's 10th and 13th birthdays[Sibling]— CMS HCPCS Level II code set
• G9418 — Primary non-small cell lung cancer lung biopsy and cytology specimen report documents classification into specific histologic type following iaslc guidance or classified as nsclc-nos with an explanation[Sibling]— CMS HCPCS Level II code set
• G9419 — Documentation of medical reason(s) for not including the histological type or nsclc-nos classification with an explanation (e.g. specimen insufficient or non-diagnostic, specimen does not contain cancer, or other documented medical reasons)[Sibling]— CMS HCPCS Level II code set
• G9420 — Specimen site other than anatomic location of lung or is not classified as primary non-small cell lung cancer[Sibling]— CMS HCPCS Level II code set
• G9421 — Primary non-small cell lung cancer lung biopsy and cytology specimen report does not document classification into specific histologic type or histologic type does not follow iaslc guidance or is classified as nsclc-nos but without an explanation[Sibling]— CMS HCPCS Level II code set
• G9422 — Primary lung carcinoma resection report documents pt category, pn category and for non-small cell lung cancer, histologic type (e.g., squamous cell carcinoma, adenocarcinoma and not nsclc-nos)[Sibling]— CMS HCPCS Level II code set
• G9423 — Documentation of medical reason for not including pt category, pn category and histologic type [for patient with appropriate exclusion criteria (e.g., metastatic disease, benign tumors, malignant tumors other than carcinomas, inadequate surgical specimens)][Sibling]— CMS HCPCS Level II code set
• G9424 — Specimen site other than anatomic location of lung, or classified as nsclc-nos[Sibling]— CMS HCPCS Level II code set
• and 32 more

Change history (2)

• January 1, 2017 — Removed from the code set [Change history]— CMS release files (code change ledger)
• and 1 more

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 G9437 in its code family, with their registry titles.

• G9432 — Asthma well-controlled based on the act, c-act, acq, or ataq score and results documented
• G9433 — Death, permanent nursing home resident or receiving hospice or palliative care any time during the measurement period
• G9434 — Asthma not well-controlled based on the act, c-act, acq, or ataq score, or specified asthma control tool not used, reason not given
• G9435 — Aspirin prescribed at discharge
• G9436 — Aspirin not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)
• G9438 — P2y inhibitor prescribed at discharge
• G9439 — P2y inhibitor not prescribed for documented reasons (e.g., allergy, medical intolerance, history of bleed)
• G9440 — P2y inhibitor not prescribed at discharge
• G9441 — Statin prescribed at discharge
• G9442 — Statin not prescribed for documented reasons (e.g., allergy, medical intolerance)