> ## Documentation Index > Fetch the complete documentation index at: https://docs.silnahealth.com/llms.txt > Use this file to discover all available pages before exploring further. # Record Approval for Prior Authorization. Either provide approval details (reference_number, dates, codes) to mark as approved, or provide approval_letter_file_ids to trigger approval OCR. ## OpenAPI ````yaml post /public/v1/prior-authorizations/{prior_authorization_id}/sync openapi: 3.0.2 info: title: Silna Public API version: '1.0' servers: - url: https://app.silnahealth.com/api security: - bearerAuth: [] paths: /public/v1/prior-authorizations/{prior_authorization_id}/sync: post: tags: - V1PriorAuthorizationRecordApprovalResource summary: |- Record Approval for Prior Authorization. Either provide approval details (reference_number, dates, codes) to mark as approved, or provide approval_letter_file_ids to trigger approval OCR. operationId: V1PriorAuthorizationRecordApprovalResource.post parameters: - in: path name: prior_authorization_id required: true schema: type: string requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/V1RecordApprovalCreate' description: '' responses: '204': description: OK headers: X-RateLimit-Limit: schema: type: integer description: The maximum number of requests allowed in the time window X-RateLimit-Remaining: schema: type: integer description: The number of requests remaining in the current time window X-RateLimit-Reset: schema: type: integer description: The time when the rate limit will reset, in Unix timestamp Retry-After: schema: type: number description: The number of seconds to wait before making another request '400': description: '' content: application/json: schema: $ref: '#/components/schemas/ValidationError' headers: X-RateLimit-Limit: schema: type: integer description: The maximum number of requests allowed in the time window X-RateLimit-Remaining: schema: type: integer description: The number of requests remaining in the current time window X-RateLimit-Reset: schema: type: integer description: The time when the rate limit will reset, in Unix timestamp Retry-After: schema: type: number description: The number of seconds to wait before making another request '401': description: '' content: application/json: schema: $ref: '#/components/schemas/AuthenticationError' headers: X-RateLimit-Limit: schema: type: integer description: The maximum number of requests allowed in the time window X-RateLimit-Remaining: schema: type: integer description: The number of requests remaining in the current time window X-RateLimit-Reset: schema: type: integer description: The time when the rate limit will reset, in Unix timestamp Retry-After: schema: type: number description: The number of seconds to wait before making another request '404': description: '' content: application/json: schema: $ref: '#/components/schemas/ObjectNotFoundError' headers: X-RateLimit-Limit: schema: type: integer description: The maximum number of requests allowed in the time window X-RateLimit-Remaining: schema: type: integer description: The number of requests remaining in the current time window X-RateLimit-Reset: schema: type: integer description: The time when the rate limit will reset, in Unix timestamp Retry-After: schema: type: number description: The number of seconds to wait before making another request '429': description: '' content: application/json: schema: $ref: '#/components/schemas/TooManyRequestsError' headers: X-RateLimit-Limit: schema: type: integer description: The maximum number of requests allowed in the time window X-RateLimit-Remaining: schema: type: integer description: The number of requests remaining in the current time window X-RateLimit-Reset: schema: type: integer description: The time when the rate limit will reset, in Unix timestamp Retry-After: schema: type: number description: The number of seconds to wait before making another request components: schemas: V1RecordApprovalCreate: properties: reference_number: default: null description: Authorization reference number title: Reference Number nullable: true type: string approved_start_date: default: null description: Approved start date title: Approved Start Date nullable: true format: date type: string approved_end_date: default: null description: Approved end date title: Approved End Date nullable: true format: date type: string approved_treatment_codes: description: List of approved treatment codes items: $ref: '#/components/schemas/V1RecordApprovedTreatmentCodeCreate' title: Approved Treatment Codes type: array approval_letter_file_ids: default: null description: >- List of approval letter file IDs to trigger OCR. Mutually exclusive with manual approval details. title: Approval Letter File Ids nullable: true items: format: uuid type: string type: array title: V1RecordApprovalCreate type: object x-folder: public_api ValidationError: type: object required: - message properties: message: type: string description: Human readable error message x-folder: null AuthenticationError: type: object required: - message properties: message: type: string description: Human readable error message type: $ref: '#/components/schemas/PublicApiErrorType' x-folder: null ObjectNotFoundError: type: object required: - message properties: message: type: string description: Human readable error message x-folder: null TooManyRequestsError: type: object required: - message properties: message: type: string description: Human readable error message x-folder: null V1RecordApprovedTreatmentCodeCreate: properties: treatment_codes: description: List of treatment codes items: $ref: '#/components/schemas/V1TreatmentCodeCreate' title: Treatment Codes type: array units: description: Approved units (decimal string format) title: Units type: string example: '2.5' unit_type: $ref: '#/components/schemas/PriorAuthorizationUnit' description: Type of unit time_frame: $ref: '#/components/schemas/UnitTimeFrame' default: TOTAL description: Time frame for the units reference_number: default: null description: Reference number for this treatment code group title: Reference Number nullable: true type: string required: - treatment_codes - units - unit_type title: V1RecordApprovedTreatmentCodeCreate type: object x-folder: public_api PublicApiErrorType: type: string enum: - AUTH_INVALID_REQUEST_HEADER - AUTH_INVALID_CREDENTIALS x-folder: null V1TreatmentCodeCreate: properties: code: description: Treatment code (e.g. a CPT code) title: Code type: string treatment_code_modifiers: description: List of treatment code modifiers items: $ref: '#/components/schemas/V1TreatmentCodeModifiersCreate' title: Treatment Code Modifiers type: array required: - code - treatment_code_modifiers title: V1TreatmentCodeCreate type: object x-folder: public_api PriorAuthorizationUnit: type: string enum: - VISITS - CPT_UNITS - HOURS - DAYS x-folder: prior_authorization UnitTimeFrame: type: string enum: - DAILY - WEEKLY - MONTHLY - AUTHORIZATION_PERIOD - TOTAL - SIX_MONTHS - YEARLY x-folder: prior_authorization V1TreatmentCodeModifiersCreate: properties: code: description: Modifier code title: Code type: string required: - code title: V1TreatmentCodeModifiersCreate type: object x-folder: public_api securitySchemes: bearerAuth: type: http scheme: bearer ````