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Healthcare/HL7 v2/IN2
Segment

Insurance additional info

Supplements IN1 with extended insurance details such as the insured's employer, Medicare and Medicaid identifiers, military information, eligibility source, and policy scope. It optionally follows IN1 in ADT, BAR, and DFT messages and is primarily consumed by billing, claims processing, and payer-interface systems that require detailed subscriber or eligibility data.

73fields
0required
v2.9HL7 version
in2.py
from zato.hl7v2 import IN2

in2 = IN2()
in2.insureds_employee_id = 'E001'
in2.employer_information_data = 'FT'
in2.eligibility_source = 'EMP'
in2.primary_language = 'ENG'
Python examples

Build IN2 segments in Python

How to construct and work with real-world IN2 segments.

1

Employee benefits

Employee with employer info, job title, and employment start date for benefits enrollment

from zato.hl7v2.v2_9 import IN2
from zato.hl7v2.v2_9 import CX, CWE

in2 = IN2()
in2.insureds_employee_id = CX(id_number='E1001')
in2.employer_information_data = CWE(identifier='FT')
in2.insureds_employment_start_date = '20240115'
in2.job_title = 'Wellness Coordinator'
2

Military coverage

Active duty service member with sponsor name, branch, rank, and status

from zato.hl7v2.v2_9 import IN2
from zato.hl7v2.v2_9 import XPN, CWE

in2 = IN2()
in2.military_sponsor_name = XPN(
    family_name='CLARK',
    given_name='JAMES',
    middle_name='R'
)
in2.military_id_number = 'MIL-7890'
in2.military_organization = 'WELLNESS COMMAND'
in2.military_station = 'FT HARMONY'
in2.military_service = CWE(identifier='USA')
in2.military_rank_grade = CWE(identifier='CPT')
in2.military_status = CWE(identifier='ACT')
3

Policy details

Insurance policy with payor info, eligibility source, scope, and baby coverage

from zato.hl7v2.v2_9 import IN2
from zato.hl7v2.v2_9 import CX, CWE

in2 = IN2()
in2.baby_coverage = 'Y'
in2.combine_baby_bill = 'Y'
in2.payor_id = CX(id_number='PAY-100')
in2.payor_subscriber_id = CX(id_number='SUB-200')
in2.eligibility_source = CWE(identifier='EMP')
in2.policy_scope = CWE(identifier='IND')
Tutorials

Learn by building

Step-by-step guides for working with HL7 v2 in Zato.

MLLP
Receive and parse HL7 v2 messages
Set up an MLLP channel, parse incoming messages, and respond with acknowledgments.
Start tutorial Build
Build and send HL7 v2 messages
Construct HL7 v2 messages from scratch using typed segment classes and send them over MLLP.
Start tutorial
Related segments

Commonly used with IN2

IN1 Insurance IN3 Insurance additional info - cert PID Patient identification PV1 Patient visit GT1 Guarantor MSH Message header
FAQ

Frequently asked questions

IN2 carries additional insurance details that supplement IN1 - employee IDs, employer information, military coverage data, eligibility source, policy scope, language preferences, and demographic attributes. It appears in ADT, registration, and billing messages.

Create the segment, set its fields, then read them back:

from zato.hl7v2.v2_9 import IN2, CX, CWE

in2 = IN2()
in2.insureds_employee_id = CX(id_number='E001')
in2.eligibility_source = CWE(identifier='EMP')

emp_id = in2.insureds_employee_id
source = in2.eligibility_source

Military fields use string and CWE datatypes for service, rank, and status:

from zato.hl7v2.v2_9 import IN2, CWE, XPN

in2 = IN2()
in2.military_sponsor_name = XPN(
    family_name='CLARK',
    given_name='JAMES'
)
in2.military_service = CWE(identifier='USA')
in2.military_rank_grade = CWE(identifier='CPT')
in2.military_status = CWE(identifier='ACT')

Payor fields use CX for identifiers and CWE for eligibility source:

from zato.hl7v2.v2_9 import IN2, CX, CWE

in2 = IN2()
in2.payor_id = CX(id_number='PAY-100')
in2.payor_subscriber_id = CX(id_number='SUB-200')
in2.eligibility_source = CWE(identifier='EMP')

Employment fields include job title, start date, and employer info:

from zato.hl7v2.v2_9 import IN2, CWE

in2 = IN2()
in2.employer_information_data = CWE(identifier='FT')
in2.insureds_employment_start_date = '20240115'
in2.job_title = 'Wellness Coordinator'

Zato connects to any system that speaks HL7v2 over MLLP or FHIR over REST. This includes Epic, Cerner, Meditech, Allscripts, and other EHR platforms.

Yes, Zato has built-in MLLP support for sending and receiving HL7v2 messages. MLLP channels handle the framing protocol automatically.

Zato supports HL7 v2.9, which is backward compatible with earlier versions including v2.3, v2.5, and v2.7. Standard segments and datatypes are available as typed Python classes.

Yes. Zato handles both HL7v2 and FHIR natively, so you can parse v2 messages and build FHIR resources with IG-specific extensions in the same service. Typed Python classes are available for both protocols, including extensions from US Core, UK Core, Da Vinci, and other Implementation Guides.

Reference

IN2 field reference

Complete list of fields in the IN2 segment, HL7 v2.9.

#Python nameDatatypeUsageRepeatableTable
1▶insureds_employee_idCXOptionalYes-
2insureds_social_security_numberSTOptionalNo-
3▶insureds_employers_name_and_idXCNOptionalYes-
4▶employer_information_dataCWEOptionalNoHL70139
5▶mail_claim_partyCWEOptionalYesHL70137
6medicare_health_ins_card_numberSTOptionalNo-
7▶medicaid_case_nameXPNOptionalYes-
8medicaid_case_numberSTOptionalNo-
9▶military_sponsor_nameXPNOptionalYes-
10military_id_numberSTOptionalNo-
11▶dependent_of_military_recipientCWEOptionalNoHL70342
12military_organizationSTOptionalNo-
13military_stationSTOptionalNo-
14▶military_serviceCWEOptionalNoHL70140
15▶military_rank_gradeCWEOptionalNoHL70141
16▶military_statusCWEOptionalNoHL70142
17military_retire_dateDTOptionalNo-
18military_non_avail_cert_on_fileIDOptionalNoHL70136
19baby_coverageIDOptionalNoHL70136
20combine_baby_billIDOptionalNoHL70136
21blood_deductibleSTOptionalNo-
22▶special_coverage_approval_nameXPNOptionalYes-
23special_coverage_approval_titleSTOptionalNo-
24▶non_covered_insurance_codeCWEOptionalYesHL70143
25▶payor_idCXOptionalYes-
26▶payor_subscriber_idCXOptionalYes-
27▶eligibility_sourceCWEOptionalNoHL70144
28▶room_coverage_type_amountRMCOptionalYes-
29▶policy_type_amountPTAOptionalYes-
30▶daily_deductibleDDIOptionalNo-
31▶living_dependencyCWEOptionalNoHL70223
32▶ambulatory_statusCWEOptionalYesHL70009
33▶citizenshipCWEOptionalYesHL70171
34▶primary_languageCWEOptionalNoHL70296
35▶living_arrangementCWEOptionalNoHL70220
36▶publicity_codeCWEOptionalNoHL70215
37protection_indicatorIDOptionalNoHL70136
38▶student_indicatorCWEOptionalNoHL70231
39▶religionCWEOptionalNoHL70006
40▶mothers_maiden_nameXPNOptionalYes-
41▶nationalityCWEOptionalNoHL70212
42▶ethnic_groupCWEOptionalYesHL70189
43▶marital_statusCWEOptionalYesHL70002
44insureds_employment_start_dateDTOptionalNo-
45employment_stop_dateDTOptionalNo-
46job_titleSTOptionalNo-
47▶job_code_classJCCOptionalNo-
48▶job_statusCWEOptionalNoHL70311
49▶employer_contact_person_nameXPNOptionalYes-
50▶employer_contact_person_phone_numberXTNOptionalYes-
51▶employer_contact_reasonCWEOptionalNoHL70222
52▶insureds_contact_persons_nameXPNOptionalYes-
53▶insureds_contact_person_phone_numberXTNOptionalYes-
54▶insureds_contact_person_reasonCWEOptionalYesHL70222
55relationship_to_the_patient_start_dateDTOptionalNo-
56relationship_to_the_patient_stop_dateDTOptionalYes-
57▶insurance_co_contact_reasonCWEOptionalNoHL70232
58▶insurance_co_contact_phone_numberXTNOptionalYes-
59▶policy_scopeCWEOptionalNoHL70312
60▶policy_sourceCWEOptionalNoHL70313
61▶patient_member_numberCXOptionalNo-
62▶guarantors_relationship_to_insuredCWEOptionalNoHL70063
63▶insureds_phone_number_homeXTNOptionalYes-
64▶insureds_employer_phone_numberXTNOptionalYes-
65▶military_handicapped_programCWEOptionalNoHL70343
66suspend_flagIDOptionalNoHL70136
67copay_limit_flagIDOptionalNoHL70136
68stoploss_limit_flagIDOptionalNoHL70136
69▶insured_organization_name_and_idXONOptionalYes-
70▶insured_employer_organization_name_and_idXONOptionalYes-
71▶raceCWEOptionalYesHL70005
72▶patients_relationship_to_insuredCWEOptionalNoHL70344
73▶co_pay_amountCPOptionalNo-

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