> ## 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.

# Calculate timely filing deadline

> Calculate the timely filing deadline for a payer given a date of service.



## OpenAPI

````yaml /docs/openapi.client.json get /v1/payers/{slug}/filing-deadline
openapi: 3.1.0
info:
  description: >-
    Client API for RCIntel. Admin ingest, catalog sync, and internal audit
    routes are omitted. 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: >-
      Geographic payer policy lookup (national NCD vs MAC LCD vs state). Query
      payer, code, state, plan_type. Each row includes geo_scope and
      document_version.
    name: policies
  - 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.
    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
  - description: Health checks, service metadata, and Prometheus metrics.
    name: system
paths:
  /v1/payers/{slug}/filing-deadline:
    get:
      tags:
        - payers
      summary: Calculate timely filing deadline
      description: >-
        Calculate the timely filing deadline for a payer given a date of
        service.
      operationId: get_filing_deadline_v1_payers__slug__filing_deadline_get
      parameters:
        - description: Normalized payer slug identifier.
          in: path
          name: slug
          required: true
          schema:
            title: Slug
            type: string
        - description: Date of service (YYYY-MM-DD)
          in: query
          name: date_of_service
          required: true
          schema:
            description: Date of service (YYYY-MM-DD)
            title: Date Of Service
            type: string
        - description: 'Claim type: professional, institutional, dental'
          in: query
          name: claim_type
          required: false
          schema:
            default: professional
            description: 'Claim type: professional, institutional, dental'
            title: Claim Type
            type: string
        - description: State code for state-specific overrides
          in: query
          name: state
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            description: State code for state-specific overrides
            title: State
        - description: Plan type for plan-specific overrides
          in: query
          name: plan_type
          required: false
          schema:
            anyOf:
              - type: string
              - type: 'null'
            description: Plan type for plan-specific overrides
            title: Plan Type
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FilingDeadlineResponse'
          description: Successful Response
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
        - APIKeyHeader: []
components:
  schemas:
    FilingDeadlineResponse:
      description: Timely filing deadline calculation for a payer + date of service.
      properties:
        claim_type:
          title: Claim Type
          type: string
        date_of_service:
          title: Date Of Service
          type: string
        days_remaining:
          description: Days until deadline (negative if expired)
          title: Days Remaining
          type: integer
        deadline_date:
          description: Filing deadline date (YYYY-MM-DD)
          title: Deadline Date
          type: string
        effective_days:
          description: Effective days after state/plan overrides
          title: Effective Days
          type: integer
        is_expired:
          description: Whether the filing window has closed
          title: Is Expired
          type: boolean
        override_applied:
          anyOf:
            - type: string
            - type: 'null'
          description: Override source if any (state or plan)
          title: Override Applied
        payer_name:
          title: Payer Name
          type: string
        payer_slug:
          title: Payer Slug
          type: string
        standard_days:
          description: Base filing limit in days
          title: Standard Days
          type: integer
      required:
        - payer_slug
        - payer_name
        - claim_type
        - date_of_service
        - standard_days
        - effective_days
        - deadline_date
        - days_remaining
        - is_expired
      title: FilingDeadlineResponse
      type: object
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          title: Detail
          type: array
      title: HTTPValidationError
      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
  securitySchemes:
    APIKeyHeader:
      in: header
      name: X-API-Key
      type: apiKey

````