diff --git a/.gitignore b/.gitignore
index 4971a6b..a2d63fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -160,3 +160,200 @@ cython_debug/
 .idea/
 
 .editorconfig
+
+
+# Created by https://www.toptal.com/developers/gitignore/api/macos,pycharm,visualstudiocode,windows
+# Edit at https://www.toptal.com/developers/gitignore?templates=macos,pycharm,visualstudiocode,windows
+
+### macOS ###
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+### macOS Patch ###
+# iCloud generated files
+*.icloud
+
+### PyCharm ###
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# AWS User-specific
+.idea/**/aws.xml
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# IntelliJ
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# SonarLint plugin
+.idea/sonarlint/
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+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
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+fabric.properties
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+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
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+### PyCharm Patch ###
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+
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+# modules.xml
+# .idea/misc.xml
+# *.ipr
+
+# Sonarlint plugin
+# https://plugins.jetbrains.com/plugin/7973-sonarlint
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+.idea/$CACHE_FILE$
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+# https://plugins.jetbrains.com/plugin/12206-codestream
+.idea/codestream.xml
+
+# Azure Toolkit for IntelliJ plugin
+# https://plugins.jetbrains.com/plugin/8053-azure-toolkit-for-intellij
+.idea/**/azureSettings.xml
+
+### VisualStudioCode ###
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+!.vscode/*.code-snippets
+
+# Local History for Visual Studio Code
+.history/
+
+# Built Visual Studio Code Extensions
+*.vsix
+
+### VisualStudioCode Patch ###
+# Ignore all local history of files
+.history
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+### Windows ###
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
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+$RECYCLE.BIN/
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+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+# End of https://www.toptal.com/developers/gitignore/api/macos,pycharm,visualstudiocode,windows
diff --git a/src/MEDS_DEV/datasets/UCLA/README.md b/src/MEDS_DEV/datasets/UCLA/README.md
new file mode 100644
index 0000000..161efd8
--- /dev/null
+++ b/src/MEDS_DEV/datasets/UCLA/README.md
@@ -0,0 +1,33 @@
+# UCLA DDR MEDS Dataset
+
+UCLA Health serves well over half a million patients annually, and as a result, UCLA possesses a vast database of Electronic Health Records (EHR). The stemming Discovery Data Repository (DDR) serves as an invaluable resource for researchers. Within the DDR Medical record concepts and organization, and the UCLA ATLAS Precision Health Biobank which integrates genetic information and de-identified medical records enable precision health research.
+
+## Access Requirements
+
+In order to gain access you will need to clear and obtain HIPAA compliance. *HIPAA compliance is the practice of following the Health Insurance Portability and Accountability Act (HIPAA) to protect the privacy and security of health information.* The dataset is not publicly available but people within UCLA can help run analysis on your study by sending over **source code** and **model weights** if it is a pre-trained architecture.
+
+- **License (for files)**: Specify the license under which the dataset files are distributed. (Pending)
+- **Data Use Agreement**: Specify any data use agreement that must be signed to access the dataset. (Pending)
+
+## Supported Tasks
+
+Currently the tasks supported by the UCLA-MEDS format are follows:
+
+- `tasks/mortality/in_icu/first_24h.yaml`
+
+## MEDS-transformation
+
+Researchers at UCLA have transformed our DDR database into the medsformat making it quick and easy to run any analyses at our institution.
+
+## Sources
+
+Summarize the sources of the dataset. If the dataset is a combination of multiple sources, list them here.
+
+1. https://link-to-dataset.org
+
+## Contact
+
+For queries or questions. Feel free to send emails to
+
+- Simon A. Lee (simonlee711@g.ucla.edu)
+- Jeffrey N. Chiang (njchiang@g.ucla.edu)
diff --git a/src/MEDS_DEV/datasets/UCLA/predicates.yaml b/src/MEDS_DEV/datasets/UCLA/predicates.yaml
new file mode 100644
index 0000000..2045c6b
--- /dev/null
+++ b/src/MEDS_DEV/datasets/UCLA/predicates.yaml
@@ -0,0 +1,18 @@
+predicates:
+  hospital_admission:
+    code: { regex: "^HOSPITAL_ADMISSION//.*" }
+  hospital_discharge:
+    code: { regex: "^HOSPITAL_DISCHARGE//.*" }
+
+  ED_registration:
+    code: { regex: "^ED_REGISTRATION//.*" }
+  ED_discharge:
+    code: { regex: "^ED_DISCHARGE//.*" }
+
+  icu_admission:
+    code: { regex: "^ICU_ADMISSION//.*" }
+  icu_discharge:
+    code: { regex: "^ICU_DISCHARGE//.*" }
+
+  death:
+    code: MORTALITY