Medicare Secondary Payer Manual (Pub. 100-05), Ch. 6 § 10.2
Definition of MSP/CWF Terms
10.2 - Definition of MSP/CWF Terms
(Rev. 12078; Issued:06-14-23; Effective: 05-29-23; Implementation: 05-29-23)
Following is a list of terms and their definitions used in MSP/CWF processing.
MSP Auxiliary File - Up to 17 beneficiary MSP occurrences/records on the CWF
database.
MSP Auxiliary Record - Record of beneficiary MSP information. One MSP
record/occurrence within the beneficiary's MSP auxiliary file.
Occurrence - One MSP occurrence/record within the beneficiary's MSP auxiliary file.
MSP Effective Date - Effective date of MSP coverage.
MSP Termination Date - Termination date of MSP coverage.
Validity Indicator
• Y - Beneficiary has MSP coverage (there is a primary insurer for this period of
time).
• N - No MSP coverage (the N validity indicator is no longer used, but will be seen
on older MSP CWF records)
• I - See §10.1.
• D – Deleted MSP Record
MSP Types - Reason for other coverage entitlement.
• A = Working Aged
• B = End stage renal disease (ESRD)
• D = Automobile/Liability No-Fault
• E = Workers' Compensation (WC)
• F = Federal, Public Health (note: currently not used)
• G = Disabled
• H = Black Lung (BL)
• L=Liability
• W=Workers’ Compensation Medicare Set-Aside Arrangement (WCMSA)
NOTE: VA and other Federal payments are MSP exclusions rather than MSP non-
payments. Where the VA authorized services, Medicare does not make payment for items
or services furnished by a non-Federal provider pursuant to such an authorization.
Although certain MSP billing procedures apply, VA is not an MSP provision.
Cost Avoided Claim - A claim returned without payment because CWF indicators
indicate another insurer is primary to Medicare. (See Pub. 100-05, Chapter 5 for complete
description.)
Transaction Type - Identifies type of maintenance record.
• 0 = Transaction type to add or change MSP data
• 1 = Transaction type to delete MSP data
Override Code - Code used to bypass CWF, MSP edit to allow primary Medicare
payment. (See §40.4 for a detailed explanation.)
MSP Contractor Numbers
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
33333 = Litigation Settlement
V
4000
P
55555 = HMO Rate Cell
Adjustment
U
3000
B,D,T,U,V,
or W
77777 = IRS/SSA/HCFA Data
Match (I, II, III, IV, V, or VI)
Y
1000
Q
88888 = Voluntary Data Sharing
Agreements
Q
5000
O
99999 = Initial Enrollment
Questionnaire
T
2000
MSP Contractor Numbers prior to January 1, 2001
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
0
11100 = MSP Contractor
6000
1
11101 = Initial Enrollment
Questionnaire
K
6010
2
11102 = IRS/SSA/CMS Data
Match
E
6020
3
11103 = HMO Rate Cell
F
6030
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
4
11104 = Litigation Settlement
G
6040
5
11105 = Employer Voluntary
Reporting
H
6050
6
11106 = Insurer Voluntary
Reporting
H
6060
7
11107 = First Claim
Development
E
6070
8
11108 = Trauma Code
Development
F
6080
9
11109 = Secondary Claims
Investigation
G
6090
X
11110 = Self Reports
H
7000
Y
11111 = 411.25
J
7010
NOTE: Effective January 1, 2001, the following MSP Contractor numbers and
nonpayment/payment denial codes will be used.
MSP Contractor Numbers Effective January 1, 2001
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
0
11100 = MSP Contractor
00 Effective
4/1/2020
6000
1
11101 = Initial Enrollment
Questionnaire
T
6010
2
11102 = IRS/SSA/CMS Data
Match
Y
6020
3
11103 = HMO Rate Cell
U
6030
4
11104 = Litigation Settlement
V
6040
5
11105 = Employer Voluntary
Reporting
Q
6050
6
11106 = Insurer Voluntary
Reporting
K
6060
7
11107 = First Claim
Development
E
6070
8
11108 = Trauma Code
Development
F
6080
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
9
11109 = Secondary Claims
Investigation
G
6090
10 -
Effective
4/1/2002
11110 = Self Reports
H
7000
11 -
Effective
4/1/2002
11111 = 411.25
J
7010
11101, 11102, 11103, 11104, and 11105 use the same non-payment denial codes as
their previous contractor numbers (i.e., 33333, 55555, 77777, 88888, 99999). Savings
from the old and new numbers, if applicable will be reported together (e.g., 11101
and 99999, etc). There must be a conversion of the MSP savings to the new non-
payment/payment denial codes as of January 1, 2001.
Additional MSP Contractor Numbers Effective April 1, 2002
Effective April 1, 2002, CWF is expanding the source code field and the
nonpayment/ payment denial code field from 1-position fields to 2-position fields.
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
12
11112 = Blue Cross-Blue Shield
Voluntary Data Sharing
Agreements
12
7012
13
11113 = Office of Personnel
Management (OPM) Data Match
13
7013
14
11114 = State Workers'
Compensation (WC) Data Match
14
7014
15
11115 = WC Insurer Voluntary
Data Sharing Agreements (WC
VDSA)
15
7015
16
11116 = Liability Insurer
Voluntary Data Sharing
Agreements (LIAB VDSA)
16
7016
17
11117 = Voluntary Data Sharing
Agreements (No Fault VDSA)
17
7017
CWF
Source
Codes
MSP Contractor Numbers
Non-
payment/
Payment
Denial Codes
CROWD Special
Project Numbers
18
11118 = Pharmacy Benefit
Manager Data
18
7018
19
11119 = Workers’ Compensation
Medicare Set-Aside Arrangement
19
7019
20
11120 = COBA
20
N/A
21
11121= MIR Group Health Plan
21
7021
22
11122= MIR Non-Group Health
Plan
22
7022
23
11123 = To be determined
23
7023
24
11124 = To be determined
24
7024
25
11125 = Recovery Audit
Contractor-California
25
7025
26
11126 = Recovery Audit
Contractor-Florida
26
7026
27
11127 = To be determined
27
7027
“”
“”
“”
“”
39
11139 = GHP Recovery
39
7039
41
11141 =NGHP Non Ongoing
Responsibility for Medicals
(ORM)
41
7041
42
11142 = NGHP ORM Recovery
42
7042
43
11143 = MSP Contractor
/Medicare Part C/Medicare
Advantage
43
7043
“”
“”
“”
“”
99
11199 = To be determined
99
7099