G8601 HCPCS Level II Code: Iv thrombolytic therapy not initiated within 4.5 hours (<= 270 minutes) of time last known well for reasons documented by clinician (e.g. patient enrolled in clinical trial for stroke, patient…
Medicare Coverage & Payment
- CMS short descriptor: No elig tpa init w/in 4.5 hr
- Medicare coverage: Carrier judgment (CMS coverage code C)
- Payment category: Service not separately priced (pricing indicator 00)
- BETOS: M5D — Specialist - other
- Last CMS action effective: January 1, 2024
Source: CMS HCPCS Level II release. Coverage codes indicate how Medicare treats the code, not whether a specific claim will be paid; payer policy and documentation still govern.
Contextual Map
Every relationship of G8601 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)
- G8600 — Iv thrombolytic therapy initiated within 4.5 hours (<= 270 minutes) of time last known well[Sibling]
- G8602 — Iv thrombolytic therapy not initiated within 4.5 hours (<= 270 minutes) of time last known well, reason not given[Sibling]
- G8627 — Surgical procedure performed within 30 days following cataract surgery for major complications (e.g., retained nuclear fragments, endophthalmitis, dislocated or wrong power iol, retinal detachment, or wound dehiscence)[Sibling]
- G8628 — Surgical procedure not performed within 30 days following cataract surgery for major complications (e.g., retained nuclear fragments, endophthalmitis, dislocated or wrong power iol, retinal detachment, or wound dehiscence)[Sibling]
- G8629 — Documentation of order for prophylactic parenteral antibiotic to be given within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no incision is required)[Sibling]
- G8630 — Documentation that administration of prophylactic parenteral antibiotics was initiated within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no incision is required), as ordered[Sibling]
- G8631 — Clinician documented that patient was not an eligible candidate for ordering prophylactic parenteral antibiotics to be given within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no incision is required)[Sibling]
- G8632 — Prophylactic parenteral antibiotics were not ordered to be given or given within one hour (if fluoroquinolone or vancomycin, two hours) prior to the surgical incision (or start of procedure when no incision is required), reason not given[Sibling]
- and 32 more
Change history
- January 1, 2010 — Added to the code set [Change history]
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
Change history
- January 1, 2010Added to the code setIv thrombolytic therapy not initiated within 4.5 hours (<= 270 minutes) of time last known well for reasons documented by clinician (e.g. patient enrolled in clinical trial for stroke, patient admitted for elective carotid intervention)
Nearest Codes in This Family
Official HCPCS Level II classifications closest to G8601 in its code family, with their registry titles.
- G8600 — Iv thrombolytic therapy initiated within 4.5 hours (<= 270 minutes) of time last known well
- G8602 — Iv thrombolytic therapy not initiated within 4.5 hours (<= 270 minutes) of time last known well, reason not given
- G8627 — Surgical procedure performed within 30 days following cataract surgery for major complications (e.g., retained nuclear fragments, endophthalmitis, dislocated or wrong power iol, retinal detachment,…
- G8628 — Surgical procedure not performed within 30 days following cataract surgery for major complications (e.g., retained nuclear fragments, endophthalmitis, dislocated or wrong power iol, retinal…
- G8629 — Documentation of order for prophylactic parenteral antibiotic to be given within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure when no…
- G8630 — Documentation that administration of prophylactic parenteral antibiotics was initiated within one hour (if fluoroquinolone or vancomycin, two hours) prior to surgical incision (or start of procedure…
- G8631 — Clinician documented that patient was not an eligible candidate for ordering prophylactic parenteral antibiotics to be given within one hour (if fluoroquinolone or vancomycin, two hours) prior to…
- G8632 — Prophylactic parenteral antibiotics were not ordered to be given or given within one hour (if fluoroquinolone or vancomycin, two hours) prior to the surgical incision (or start of procedure when no…
- G8633 — Pharmacologic therapy (other than minerals/vitamins) for osteoporosis prescribed
- G8634 — Clinician documented patient not an eligible candidate to receive pharmacologic therapy for osteoporosis