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N, 0
N, 1
Has
1, 1
Physician
orders
Procedure
under- goes
Patient
Account
has
Medical history
Drug history
Specialty
Name
Procedure Code
Fee
Patient Bill
lists
Insurance Company
sent to
Insurance Claim (HCFA 1500)
gene- rates
Hospital Billing System
ERD: Peter Chen's Notation
LEGEND
cardinality, optionality
Cardinality
Optionality
One
Optional
Many
Mandatory
reim- burse
Address
Claim policy
Claim number
Name/
Patient ID #
