Which data element must be protected with regards to PCI?

Past health condition is Protected Health Information (PHI) regulated under HIPAA, not a PCI DSS cardholder data element.

Geographic location is primarily addressed by privacy regulations such as GDPR and is not a core PCI DSS-protected data element.

PCI DSS defines cardholder data to include the Primary Account Number (PAN), cardholder name, expiration date, and service code. Full name (cardholder name) is one of these explicitly enumerated data elements subject to PCI DSS protection requirements when stored, processed, or transmitted. This distinguishes PCI scope from other regulatory frameworks such as HIPAA or GDPR.

Payment amounts are part of transaction records but are not among the specifically enumerated cardholder data elements that PCI DSS mandates protection for.