> ## Documentation Index > Fetch the complete documentation index at: https://docs.rcintell.com/llms.txt > Use this file to discover all available pages before exploring further. # Cited when→then, NCCI companions, and catalog cards for one code > Compose definition + approved Rule Studio rules + NCCI + GET /v1/policies cards. ## OpenAPI ````yaml /docs/openapi.client.json get /v1/codes/{code}/guidance openapi: 3.1.0 info: description: >- Client API for RCIntel. Authenticate with X-API-Key. See Guides → Which API to use. summary: Multi-tenant knowledge API for healthcare revenue cycle management. title: Healthcare Knowledge Layer version: 0.1.0 servers: [] security: [] tags: - description: >- Cited payer policy lookup — GET /v1/policies and GET /v1/policies/changes. Medicare FFS returns NCDs/LCDs/MACs; commercial payers return that payer's documents only. Query payer, code, state, plan_type. name: policies - description: >- Payer-policy PDF parse and retrieve for Workspace / Payer Knowledge. Service-authenticated (X-Admin-Secret); chunks stored in Postgres. name: policy - description: >- Manufacturer 340B contract-pharmacy policy, fail-closed access, and the change feed. Different API from GET /v1/policies. name: 340B Policy - description: CRD-style prior authorization check, documentation, and vendors. name: prior-auth - description: Public payer directory (no API key on list/detail). name: payers-public - description: >- Payer network directory — search payers, check prior auth requirements, view filing rules, denial patterns, and appeal levels. name: payers - description: >- Resolve healthcare billing knowledge across the L1-L6 layer stack. Includes payment calculation, billing guidance, and per-layer queries. name: knowledge - description: >- CMS Fee Schedule lookups — OPPS (Addendum B / APC), DMEPOS (state-level pricing), and Clinical Lab Fee Schedule (CLFS). name: fee-schedules - description: >- NCCI (National Correct Coding Initiative) — dedicated MUE limits, PTP bundling edits, add-on code edits, and code pair validation. Medicare edits under /ncci/*, the separate CMS Medicaid edit set under /ncci/medicaid/*. name: ncci - description: >- Service code intelligence — CPT/HCPCS lookup, RVU data, NCCI edits, payment calculation, implant/GUDID search, and service group classification. name: codes - description: >- Submit asynchronous AI agent jobs for code research, medical necessity, and denial resolution. Poll for results and retrieve reasoning traces. name: agents - description: >- Register and manage healthcare facilities by CCN (Medicare Provider Number). Each facility is the root entity for knowledge resolution. name: facilities - description: >- NPI Registry — live search against CMS NPPES API for provider and organization National Provider Identifiers. name: npi - description: >- OpenFDA drug product lookup by NDC. Includes product-level fields with normalized ingredient and package detail. name: drugs - name: encounter - name: mcp - description: Health checks, service metadata, and Prometheus metrics. name: system paths: /v1/codes/{code}/guidance: get: tags: - codes summary: Cited when→then, NCCI companions, and catalog cards for one code description: >- Compose definition + approved Rule Studio rules + NCCI + GET /v1/policies cards. operationId: get_code_guidance_v1_codes__code__guidance_get parameters: - description: >- Billing or terminology code value (CPT/HCPCS/NDC/etc depending on endpoint context). in: path name: code required: true schema: title: Code type: string - description: Payer name, slug, or alias used for payer-specific enrichment. in: query name: payer required: false schema: anyOf: - type: string - type: 'null' title: Payer - in: query name: state required: false schema: anyOf: - maxLength: 2 minLength: 2 type: string - type: 'null' title: State - in: query name: facility_type required: false schema: anyOf: - type: string - type: 'null' title: Facility Type - in: query name: as_of required: false schema: anyOf: - format: date type: string - type: 'null' title: As Of responses: '200': content: application/json: schema: $ref: '#/components/schemas/CodeGuidanceResponse' description: Successful Response '422': content: application/json: schema: $ref: '#/components/schemas/HTTPValidationError' description: Validation Error security: - APIKeyHeader: [] components: schemas: CodeGuidanceResponse: properties: as_of: anyOf: - type: string - type: 'null' title: As Of code: title: Code type: string companions: items: $ref: '#/components/schemas/GuidanceCompanion' title: Companions type: array description: anyOf: - type: string - type: 'null' title: Description facility_type: anyOf: - type: string - type: 'null' title: Facility Type payer: anyOf: - type: string - type: 'null' title: Payer policies: items: $ref: '#/components/schemas/GuidancePolicyCard' title: Policies type: array related_codes: items: type: string title: Related Codes type: array rules: items: $ref: '#/components/schemas/GuidanceRule' title: Rules type: array rules_by_type: additionalProperties: type: integer title: Rules By Type type: object state: anyOf: - type: string - type: 'null' title: State status_code: anyOf: - type: string - type: 'null' title: Status Code telehealth: default: false title: Telehealth type: boolean warnings: items: type: string title: Warnings type: array required: - code title: CodeGuidanceResponse type: object HTTPValidationError: properties: detail: items: $ref: '#/components/schemas/ValidationError' title: Detail type: array title: HTTPValidationError type: object GuidanceCompanion: properties: bill_together: title: Bill Together type: string counterpart_code: title: Counterpart Code type: string modifier_allowed: title: Modifier Allowed type: boolean rationale: anyOf: - type: string - type: 'null' title: Rationale required: - counterpart_code - bill_together - modifier_allowed title: GuidanceCompanion type: object GuidancePolicyCard: properties: coverage_status: anyOf: - type: string - type: 'null' title: Coverage Status doc_id: default: '' title: Doc Id type: string facility_types: items: type: string title: Facility Types type: array pdf_uri: default: '' title: Pdf Uri type: string rule_text: default: '' title: Rule Text type: string source_key: default: '' title: Source Key type: string title: anyOf: - type: string - type: 'null' title: Title title: GuidancePolicyCard type: object GuidanceRule: properties: because: anyOf: - type: string - type: 'null' title: Because citation: $ref: '#/components/schemas/GuidanceCitation' rule_id: title: Rule Id type: string rule_type: title: Rule Type type: string then: anyOf: - additionalProperties: true type: object - type: 'null' title: Then title: anyOf: - type: string - type: 'null' title: Title when: anyOf: - additionalProperties: additionalProperties: true type: object type: object - type: 'null' title: When required: - rule_id - rule_type - citation title: GuidanceRule type: object ValidationError: properties: ctx: title: Context type: object input: title: Input loc: items: anyOf: - type: string - type: integer title: Location type: array msg: title: Message type: string type: title: Error Type type: string required: - loc - msg - type title: ValidationError type: object GuidanceCitation: properties: document_id: title: Document Id type: string document_title: anyOf: - type: string - type: 'null' title: Document Title effective_end: anyOf: - type: string - type: 'null' title: Effective End effective_start: anyOf: - type: string - type: 'null' title: Effective Start pages: items: type: integer title: Pages type: array payer: anyOf: - type: string - type: 'null' title: Payer quote: anyOf: - type: string - type: 'null' title: Quote section_id: anyOf: - type: string - type: 'null' title: Section Id required: - document_id title: GuidanceCitation type: object securitySchemes: APIKeyHeader: in: header name: X-API-Key type: apiKey ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.