Predictive data analysis techniques for cross-temporal anomaly detection

Patent metadata

Field	Value
Publication number	US-2022019914-A1
Application number	US-202016931670-A
Country	US
Kind code	A1
Filing date	Jul 17, 2020
Priority date	Jul 17, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

There is a need for more effective and efficient predictive anomaly detection. This need can be addressed by, for example, solutions for performing anomaly detection using an anomaly detection machine learning model. In one example, a method includes: identifying a plurality of event records; for each event record of the plurality of event records, determining a temporally-related event code data object based at least in part on a temporally-related subset of the one or more event codes that is associated with the event record; generating one or more event record profiles based on each temporally-related event code data object; processing the one or more event record profiles using an anomaly detection machine learning model to generate one or more anomaly detection predictions; and performing one or more prediction-based actions based at least in part on the one or more anomaly detections.

First claim

1 . A computer-implemented method for predictive anomaly detection, the computer-implemented method comprising:
identifying a plurality of event records, wherein each event record of the plurality of event records is associated with an event period of one or more event periods, an event date of one or more event dates, and an event code of one or more event codes; for each event record of the plurality of event records, determining a temporally-related event code data object based at least in part on a temporally-related subset of the one or more event codes that is associated with the event record, wherein: (i) each event code in the temporally-related subset for a corresponding event record of the one or more event records is associated with at least one event record of the one or more event records that occurs within the event period of the corresponding event record, and (ii) each event code in the temporally-related subset for a corresponding event record of the one or more event records is associated with at least one event record of the one or more event records that occurs prior to the event date of the corresponding event record; generating one or more event record profiles, wherein: (i) each event record profile of the one or more event record profiles is associated with an event period of the one or more event periods, and (ii) each event record profile of the one or more event record profiles describes a related subset of each temporally-related event code data object for an event record of the plurality of event records that is associated with the event period for the event record profile; processing the one or more event record profiles using an anomaly detection machine learning model to generate one or more anomaly detection predictions; and performing one or more prediction-based actions based at least in part on the one or more anomaly detections.

2 . The computer-implemented method of claim 1 , wherein each temporally-related subset for a temporally-related event code data object that is associated with a corresponding event record of the one or more event records comprises each event record of the one or more event records that occurs within the event period for the corresponding event record and that is associated with the event code for the corresponding event record.

3 . The computer-implemented method of claim 2 , wherein:
each event record of the one or more event records is associated with a provider identifier, and each temporally-related subset for a temporally-related event code data object that is associated with a corresponding event record of the one or more event records comprises each event record of the one or more event records that occurs within the event period for the corresponding event record, that is associated with the event code for the corresponding event record, and that is associated with the provider identifier for the corresponding event record.

4 . The computer-implemented method of claim 1 , wherein generating a particular event record profile of the one or more event record profiles comprises:
generating one or more event code documents for the particular event record profile, wherein each event code document of the one or more event code documents describes the temporally-related event code data object for an event record of the plurality of event records that is associated with the event code document; generating the particular event record profile based at least in part on the one or more event code documents for the particular event record profile.

5 . The computer-implemented method of claim 4 , wherein generating a particular event document code of the one or more event code documents comprises:
generating a term-frequency-inverse-document-frequency (TF-IDF) score for each event code of the one or more event codes with respect to the particular event code document; and updating the particular event code document by removing from the particular event code document each event record in the event code document whose TF-IDF score fails to satisfy a TF-IDF score threshold value.

6 . The computer-implemented method of claim 1 , wherein generating one or more anomaly detection predictions comprises:
for each event record profile of the one or more event record profiles:
mapping the event record profile to a multi-dimensional embedding space associated with the anomaly detection machine learning model that comprises mappings of a group of prior event record profiles;
for each prior event record profile of the group of prior event record profiles, generating a cross-profile distance measure between the event record profile and the prior event record profile;
detecting a neighboring subset of the group of prior event record profiles for the event record profile based at least in part on each cross-profile distance measure for a prior event record profile of the group of prior event record profiles;
for each target code of one or more target codes that is associated with at least one event record profile in the neighboring subset, determining an inclusion ratio of a count of event record profiles in the neighboring set that are associated with the target code to a total count of event record profiles in the neighboring set; and
generating an anomaly detection of the one or more anomaly detection predictions based at least in part on each inclusion ratio for a target code of the one or more target codes that is associated with at least one event record in the neighboring subset.

7 . The computer-implemented method of claim 1 , wherein performing the one or more prediction-based actions comprises:
for each anomaly detection of the one or more anomaly detections, determining a priority score for the anomaly prediction based at least in part on an inclusion ratio for an event record profile of the one or more event record profiles used to generate the anomaly detection; and performing the one or more prediction-based actions based at least in part on each priority score for an anomaly detection of the one or more anomaly detections.

8 . The computer-implemented method of claim 1 , wherein the one or more event records comprise one or more medical service performance records.

9 . The computer-implemented method of claim 1 , wherein the one or more event codes comprise one or more diagnosis codes.

10 . An apparatus for predictive anomaly detection, the apparatus comprising at least one processor and at least one memory including program code, the at least one memory and the program code configured to, with the processor, cause the apparatus to at least:
identify a plurality of event records, wherein each event record of the plurality of event records is associated with an event period of one or more event periods, an event date of one or more event dates, and an event code of one or more event codes; for each event record of the plurality of event records, determine a temporally-related event code data object based at least in part on a temporally-related subset of the one or more event codes that is associated with the event record, wherein: (i) each event code in the temporally-related subset for a corresponding event record of the one or more event records is associated with at least one event record of the one or more event records that occurs within the event period of the corresponding event record, and (ii) each event code in the temporally-related subset for a corresponding event record of the one or more event records is associated with at least one event record of the one or more event records that occurs prior to the event date of the corresponding event record; generate one or more event record profiles, wherein: (i) each event record profile of

Assignees

• Optum Inc

Inventors

• James Daniel William
• Bhaskar Rahul
• Furuyama Daryl Seiichi

Classifications

• G06F16/38

  Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually · CPC title

• G06Q40/08

  Insurance · CPC title

• G06Q50/22

  Social work or social welfare, e.g. community support activities or counselling services · CPC title

• G06Q10/10

  Office automation; Time management · CPC title

• G06N5/04 Primary

  Inference or reasoning models · CPC title