Submitted by CDC_DSMH_WG on
CDC's comment for inclusion in USCDI v7
CDC recommends the inclusion of Mother's Maiden Name in USCDI v7. The inclusion of Mother’s Maiden Name is important for strengthening patient matching, particularly in neonatal and early-life care where infants may not yet have stable or fully assigned identifiers. The Mother’s Maiden Name is also a required immunization history core data element, as it is an important key to assuring an accurate match during immunization message exchanges. In these scenarios, it serves as a reliable additional attribute that improves identity resolution when used alongside demographic data.
This data element helps reduce duplicate records and mitigate misidentification risks, especially in cases involving common names or shared birthdates. It is already captured in many registration workflows, supporting its feasibility and implementation across systems.
Given ongoing challenges with patient matching and the need for more precise identification, Mother’s Maiden Name should be included as a required data element rather than optional, for better alignment with required standards practices in the immunization informatics field. Standardizing its capture would improve consistency, enhance data integrity, and support safer, more efficient information exchange across healthcare systems.
We strongly support its inclusion in USCDI v7 with appropriate guidance to ensure consistent and secure use.







Submitted by CDC_DSMH_WG on
CDC comments for draft USCDI v8
CDC recommends the inclusion of Mother's Maiden Name in USCDI v8 as a patient demographic data element supporting immunization message exchange, for these reasons:
• Established immunization core data element: Mother's Maiden Name is a core demographic data element used in CDC's IIS Core Data Elements framework, where it functions to validate patient identity and support accurate matching during immunization message exchange. It functions as a reliable additional attribute that improves identity resolution when used alongside other demographic data, particularly for neonates and infants who may not yet have stable or fully assigned identifiers.
• Reduces duplication and misidentification: This element helps reduce duplicate records and mitigate misidentification risk, particularly in cases involving common names or shared birthdates.
• Already mature, low-burden: Because it is already established as a core demographic data element in immunization information systems, its capture and exchange is both feasible and low-burden to implement.
Recommendation to ONC: Include Mother's Maiden Name in USCDI v8 as a required (rather than optional) data element, consistent with its treatment as a required element in immunization informatics. Standardize its capture to improve consistency and data integrity, and address edge-case handling (e.g., unknown, inapplicable, or withheld values) in accompanying implementation guidance.
Additional comments from NCIRD-We recognize that a similar comment was previously submitted by NCIRD for USCDI v7, and that USCDI currently includes a "Previous Name" data element (Level 2) in the Patient Demographics/Information data class. We want to clarify why a distinct Mother's Maiden Name element is still needed:
"Previous Name" identifies a prior name of the patient themselves (e.g., following marriage, divorce, or legal name change). It cannot represent Mother's Maiden Name, which refers to the patient's mother — a separate individual — and is used specifically to support patient identity matching, particularly for neonates and infants who may not yet have stable identifiers of their own. Mother's Maiden Name is also a core demographic data element in CDC's IIS Core Data Elements framework, used to validate patient identity and support accurate matching during immunization message exchange, a use case "Previous Name" does not serve.
We recommend Mother's Maiden Name be included as a distinct data element from "Previous Name" for this reason, and continue to recommend it be treated as required, consistent with its role in immunization informatics, with implementation guidance addressing edge cases (unknown, inapplicable, or withheld values).
Level 2: Captured/stored/accessed in multiple production EHRs or other HIT modules from more than one developer
Use Case: Mother's Maiden Name plays an important role in immunization message exchange, where it functions as a core demographic data element used to validate patient identity and match records across Immunization Information Systems (IIS), EHRs, and other reporting sources. It is particularly valuable in neonatal and early-life care, where infants may not yet have stable or fully assigned identifiers, and in cases involving common names or shared birthdates, where it serves as an additional differentiator to reduce duplicate records and misidentification.
Because immunization records are reconciled across independently operated systems — providers, IIS, and public health agencies — this element strengthens data integrity and supports more effective coordination of immunization efforts, directly benefiting public health surveillance, reporting, and outbreak response activities that depend on accurate, deduplicated patient records.
Supporting artifacts links:
HL7 Version 2.5.1 Implementation Guide for Immunization Messaging (Release 1.5) — PD1 (Patient Demographic) segment, which includes the mother's maiden name field: https://www.cdc.gov/vaccines/programs/iis/technical-guidance/downloads/hl7guide-1-5-2014-11.pdf
CDC IIS Core Data Elements — Patient Demographics/Information: https://www.cdc.gov/iis/core-data-elements/patient-demographics-information.html
FHIR Mother's Maiden Name extension (base FHIR, not part of US Core): http://hl7.org/fhir/StructureDefinition/patient-mothersMaidenName
Additional comments from CDC: Supporting links:
- HL7 v2.5.1 Implementation Guide for Immunization Messaging (PD1 segment): https://www.cdc.gov/vaccines/programs/iis/technical-guidance/downloads/hl7guide-1-5-2014-11.pdf
- CDC IIS Core Data Elements — Patient Demographics/Information: https://www.cdc.gov/iis/core-data-elements/patient-demographics-information.html
- FHIR Mother's Maiden Name extension: http://hl7.org/fhir/StructureDefinition/patient-mothersMaidenName