What to know
Learn more about how syndromic surveillance is improving public health in NSSP Update, a quarterly newsletter. This is a vital resource to connect, inform and inspire practitioners around the country.
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- Learn about new syndromic definitions that are under development.
Top Stories
NSSP
NSSP Technical Updates
NSSP Technical Updates
Onboarding Update
On March 2, 2025, the NSSP Onboarding team hosted the BioSense Platform Data Validation call. Topics of discussion included:
Access and Management Center (AMC) Master Facility Table (MFT) adding an American Hospital Association Identifier (AHA ID)
- In the past, NSSP was able to send website to sites to get AHA ID. AHA has recently made this site ‘members only.’
- Sites must now either reach out to hospital for ID or leave blank and NSSP will try to populate it if we have it.
New field in MFT primary facility
- New Field: Populate ESSENCE region by
- Options may be selected by facility to populate ESSENCE_Region for the facility from either the zip code (default) or the county. Current default logic pulls ESSENCE_Region by the geographic centroid of the zip code and may not accurately reflect the county where the facility is located. This change will only affect the ESSENCE_Region of the facility and will not affect the ESSENCE_Region by Patient Location. Making this change will trigger a review by Onboarding
NNDSS
NNDSS Processing Is Migrating to 1CDP; Reconciliation and Publication of 2024 Data Is Postponed to 2026.
By the end of September 2025, National Notifiable Diseases Surveillance System (NNDSS) data processing—including the Message Validation, Processing and Provisioning System (MVPS)—is migrating to the One CDC Data Platform (1CDP).
As the CDC enterprise data platform, 1CDP offers efficiencies that save time and resources to support data to action more quickly.
National case surveillance data, including the data collected in NNDSS, are a core data source for public health, and a key focus area for both the 2025 Public Health Data Strategy and 1CDP’s three-year roadmap.
To prioritize our limited staffing on migrating NNDSS data processing to 1CDP in 2025, CDC is postponing reconciliation and publication of 2024 annual data until 2026.
CDC is planning to reconcile and publish annual NNDSS data for 2024 cases and 2025 cases at the same time in 2026. CDC will reconcile and publish data using 1CDP with updated processes to maintain current data quality while saving time and resources.
CDC will continue to process and publish weekly data as we migrate NNDSS data processing to 1CDP. This change only affects reconciliation of the 2024 annual data.
NNDSS data have already been available within 1CDP to support program-driven surveillance and emergency response. The only change is that data will be processed within the platform rather than ingested into the platform after processing.
Next steps for jurisdictions:
- CDC’s Office of Public Health Data, Surveillance, and Technology will coordinate with CDC programs and jurisdictions to resume annual reconciliation and publication of NNDSS national case surveillance data in 2026.
- CDC encourages jurisdictions to continue reviewing their 2024 annual data on their own as time allows.
- Jurisdictions can review and lock their 2024 annual data using the reconciliation module in the Message Validation, Processing, and Provisioning System (MVPS) in 2025. The functionality is optional and will be available from July 14, 2025, through Sept. 30, 2025. CDC posted a detailed job aid on July 14, 2025, in the help section of the MVPS portal. However, CDC’s NNDSS team will not be able to provide hands-on reconciliation assistance in 2025.
- In a change to our original announcement, CDC is no longer asking jurisdictions to review and transmit their 2024 data to CDC by July 25, 2025.
- If you have questions, please send them to edx@cdc.gov with the subject line, “2024 Reconciliation Questions.”
NNDSS Technical Updates
Of note, COVID-19 was removed from the nationally notifiable condition list. Consequently, NNDSS stopped receiving and processing case notifications for any COVID-19 case notifications received for MMWR year 2025 and later.Other changes for 2025 include:
1) case definition revisions to seven existing nationally notifiable diseases;
2) establishment of case definitions for three conditions under standardized surveillance, which are not nationally notifiable;
3) case definition revision for one condition under standardized surveillance, which is not nationally notifiable;
4) reminder about novel influenza A;
5) reminder about Oropouche virus updates;
6) summary of NNDSS event code changes.
For a detailed breakdown of the changes, please see 2025 changes to the National Notifiable Diseases Surveillance System.
Congratulations to the following jurisdictions
- Maryland for HAI MDRO MMG (C. auris only)
- Puerto Rico and West Virginia for STD/CS MMGs
Measuring success
Sucess Stories and Articles
NSSP Facility Participation Map
Current Events
NSSP
1CDP Transition. Through the Public Health Data Strategy, CDC has developed a roadmap to public health data modernization. One CDC Data Platform, or 1CDP, is a crucial accelerator of the Public Health Data Strategy. As an enterprise platform for the agency and its partners, 1CDP provides efficiencies that save time and resources to support data to action more quickly. NSSP is building out 1CDP capabilities to manage data ingest and message processing and will be able to take advantage of platform tools to work with the emergency department and commercial laboratory data.
Call for Inpatient Hospitalization Data! Please join the conversation on the Slack® channel, Hospital Admissions / Inpatient Data, or email nssp@cdc.gov if your site is reporting or is interested in provisioning inpatient data to the BioSense Platform. We welcome sites to share their experiences! NSSP would also like to hear from site administrators interested in discussing inpatient onboarding for their jurisdictions. Please email nssp@cdc.gov and an NSSP team member will respond to set up a meeting to discuss next steps.
Updates to NSSP Data Dictionary Available. The NSSP Data Dictionary now includes a tab of terms and definitions. Community members have posted questions on Slack® about how ESSENCE maps changes to sex data.
NSSP Governance Framework. This document summarizes data sharing, access, and dissemination for the program. The rules outlined have been drafted consistent with the terms of the Core Data Use Agreement (DUA) and NSSP Addendum. Reach out to nssp@cdc.gov for more information.
Newly Cleared Fact Sheets. CSTE is in the process of adding newly cleared factsheets to the Knowledge Repository.
NNDSS
Upcoming eSHARE Webinar
Please join us for the National Notifiable Diseases Surveillance System (NNDSS) eSHARE scheduled for Tuesday, July 15, 2025, from 3:00 PM - 4:00 PM ET.
This eSHARE webinar will feature a presentation on the Case Notification Minimal Data Necessary (MDN) release and updates on NNDSS, Case Surveillance, and 1CDP. We encourage jurisdictions to invite their epidemiologists and other key members of their team to the webinar.
To join a webinar, please see your Outlook invitation or contact the CDC Electronic Data Exchange mailbox at edx@cdc.gov for login information.
Resources
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NSSP Quick Links
Community of Practice Website
Community of Practice Membership
Community Call Recordings
Knowledge Repository
NSSP Successes
Slack Workspace
NNDSS Quick Links
Case Surveillance Modernization
Event Codes & Other Surveillance Resources
HL7 Message Mapping Guides & Artifacts
HL7 Implementation & Onboarding Technical Assistance
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