> For the complete documentation index, see [llms.txt](https://docs.payerset.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payerset.com/data-lake.md). # Data Lake - [Data Dictionary](https://docs.payerset.com/data-lake/data-dictionary.md): Detailed descriptions of field names from Payer Price Transparency Machine-Readable files. - [Payer Transparency (TiC)](https://docs.payerset.com/data-lake/data-dictionary/payer-transparency-tic.md): Data dictionary for the Payer Transparency in Coverage data for medical services. Below are the fields available for Data Lake customers. - [Hospital Transparency](https://docs.payerset.com/data-lake/data-dictionary/hospital-transparency.md): Data dictionary for the Hospital Price Transparency data for medical and pharmaceutical services. Below are the fields available for Data Lake customers. - [Employer Reporting Plans](https://docs.payerset.com/data-lake/data-dictionary/employer-reporting-plans.md): This dataset contains mappings of Payers and EIN values to the health plans they have (Reporting Plans) values based on the Transparency in Coverage data across our available payers. - [EIN to NPI Map](https://docs.payerset.com/data-lake/data-dictionary/ein-to-npi-map.md): These files contain mappings of EIN values to NPI values based on the Transparency in Coverage data across our available payers. - [Payerset Price Transparency Algorithm](https://docs.payerset.com/data-lake/payerset-price-transparency-algorithm.md) - [NPI Data from NPPES](https://docs.payerset.com/data-lake/npi-data-from-nppes.md): Data downloaded and stored for convenience, updated quarterly to ensure matching with the Payerset datasets - [Payerset Billing Code Classification](https://docs.payerset.com/data-lake/payerset-billing-code-classification.md): The Payerset Billing Code Classification™ is a classification of over 18,000 medical billing codes, covering CPT, HCPCS, and MS-DRG code types, with standardized names, categories, and subcategories. - [Taxonomy Data from NUCC](https://docs.payerset.com/data-lake/taxonomy-data-from-nucc.md): National Uniform Claim Committee (NUCC) Taxonomy Mapping Datase --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://docs.payerset.com/data-lake.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.