# Varian Medical Systems

**Canonical:** https://apis.io/providers/varian-medical-systems/  
**Website:** https://www.varian.com  
**APIs profiled:** 12

Varian Medical Systems is a leading manufacturer of medical devices and software for treating cancer with radiotherapy, radiosurgery, proton therapy, and brachytherapy. Acquired by Siemens Healthineers in 2021, Varian provides the ARIA Oncology Information System (OIS) and developer APIs enabling integration with clinical workflows, EHR systems, and the broader healthcare ecosystem using HL7, DICOM, and FHIR standards.

## Kin Score — 37.8 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.5 from 37.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 66.2 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 31.0 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

Regulatory layer — **Health**: 42.5 (matched via tags).

## Agent readiness — 34.7 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | na |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | na |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | na |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (12)

- **ARIA Access API** — The legacy ARIA Access API provides SOAP and REST access to core ARIA entities including patients, appointments, prescriptions, treatment plans, orders, and administrative data....
- **Varian Medical Systems AllergyIntolerance API** — Patient allergy and intolerance records
- **Varian Medical Systems CarePlan API** — Oncology treatment and care plans
- **Varian Medical Systems Condition API** — Cancer diagnoses and clinical conditions
- **Varian Medical Systems DiagnosticReport API** — Pathology, imaging, and treatment reports
- **Varian Medical Systems DocumentReference API** — Clinical document management
- **Varian Medical Systems Goal API** — Treatment goals and objectives
- **Varian Medical Systems MedicationRequest API** — Chemotherapy and medication prescriptions
- **Varian Medical Systems Metadata API** — FHIR server capability and metadata
- **Varian Medical Systems Observation API** — Labs, vitals, and clinical measurements
- **Varian Medical Systems Patient API** — Oncology patient demographics and identifiers
- **Varian Medical Systems Procedure API** — Radiation therapy and other clinical procedures

## Agentic access (1)

- **Varian Medical Systems Agentic Access** — 16 operations

## Security (2)

- **Varian Medical Systems Authentication** — oauth2 · 1 scheme
- **Varian Medical Systems Domain Security** — TLSv1.2 · HSTS · DMARC

## Plans (1)

- **Varian Medical Systems Plans Pricing**

## Tags

Healthcare, Oncology, Medical Devices, FHIR, Radiation Therapy, Health IT, Fortune 1000

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/varian-medical-systems/). Scores are computed from the provider's own public artifacts under a published rubric.