EMS Data Dictionary

Single source of truth across all national EMS data standards

Total Elements

453

Total Code Values

2,515

Validation Rules

8,176

Sections

Reference Tools

Element Browser

Browse all NEMSIS elements with definitions, code values, and validation rules.

Scope of Practice

National EMS Scope of Practice Model — authorized skills by certification level.

Rule Search

Search validation rules across all states by element ID or rule content.

Browse by Section

Agency

dAgency

3 elements3 rules

Airway

eAirway

11 elements173 rules

Arrest

eArrest

19 elements634 rules

Crew

eCrew

3 elements100 rules

Custom Configuration

eCustomConfiguration

9 elements0 rules

Custom Results

eCustomResults

3 elements3 rules

Device

eDevice

12 elements17 rules

Dispatch

eDispatch

6 elements36 rules

Disposition

eDisposition

31 elements798 rules

Exam

eExam

24 elements143 rules

History

eHistory

20 elements178 rules

Injury

eInjury

29 elements274 rules

Labs

eLabs

8 elements16 rules

Medications

eMedications

13 elements375 rules

Narrative

eNarrative

1 elements40 rules

Other

eOther

22 elements99 rules

Outcome

eOutcome

15 elements6 rules

Patient

ePatient

25 elements440 rules

Payment

ePayment

59 elements31 rules

Procedures

eProcedures

15 elements326 rules

Protocols

eProtocols

2 elements16 rules

Record

eRecord

4 elements30 rules

Response

eResponse

23 elements396 rules

Scene

eScene

25 elements370 rules

Situation

eSituation

20 elements459 rules

Times

eTimes

17 elements756 rules

Vitals

eVitals

34 elements564 rules

Data Sources

NEMSIS 3.5 Standard

Live

National EMS Information System data standard including all element definitions, code values, and validation rules.

State Validation Rules

51 States

State-specific Schematron validation rules parsed from official state NEMSIS implementation guides.