CMS Pub. 100-04, ch. 26, § 10.2

The term Medicare beneficiary identifier (Mbi) is a general term describing a

beneficiary's Medicare identification number. For purposes of this manual, Medicare

beneficiary identifier references both the Health Insurance Claim Number (HICN) and

the Medicare Beneficiary Identifier (MBI) during the new Medicare card transition

period and after for certain business areas that will continue to use the HICN as part of

their processes.

Item 1 - Shows the type of health insurance coverage applicable to this claim by the

appropriately checked box; check the Medicare box.

Item 1a - Enter the patient's Medicare beneficiary identifier whether Medicare is the

primary or secondary payer. This is a required field.

Item 2 - Enter the patient's last name, first name, and middle initial, if any, as shown on

the patient's Medicare card. This is a required field.

Item 3 - Enter the patient's 8-digit birth date (MM | DD | CCYY) and sex.

Item 4 - If there is insurance primary to Medicare, either through the patient's or spouse's

employment or any other source, list the name of the insured here. When the insured and

the patient are the same, enter the word SAME. If Medicare is primary, leave blank.

Item 5 - Enter the patient's mailing address and telephone number. On the first line enter

the street address; the second line, the city and state; the third line, the ZIP code and

phone number.

Item 6 - Check the appropriate box for patient's relationship to insured when item 4 is

completed.

Item 7 - Enter the insured's address and telephone number. When the address is the same

as the patient's, enter the word SAME. Complete this item only when items 4, 6, and 11

are completed.

Item 8 - Form version 08/05: Check the appropriate box for the patient's marital status

and whether employed or a student.

Form version 02/12: Leave blank.

Item 9 - Enter the last name, first name, and middle initial of the enrollee in a Medigap

policy if it is different from that shown in item 2. Otherwise, enter the word SAME. If

no Medigap benefits are assigned, leave blank. This field may be used in the future for

supplemental insurance plans.

NOTE: Only participating physicians and suppliers are to complete item 9 and its

subdivisions and only when the beneficiary wishes to assign his/her benefits under a

MEDIGAP policy to the participating physician or supplier.

Participating physicians and suppliers must enter information required in item 9 and its

subdivisions if requested by the beneficiary. Participating physicians/suppliers sign an

agreement with Medicare to accept assignment of Medicare benefits for all Medicare

patients. A claim for which a beneficiary elects to assign his/her benefits under a

Medigap policy to a participating physician/supplier is called a mandated Medigap

transfer. (See chapter 28.)

Medigap - Medigap policy meets the statutory definition of a "Medicare supplemental

policy" contained in §1882(g)(1) of title XVIII of the Social Security Act (the Act) and

the definition contained in the NAIC Model Regulation that is incorporated by reference

to the statute. It is a health insurance policy or other health benefit plan offered by a

private entity to those persons entitled to Medicare benefits and is specifically designed

to supplement Medicare benefits. It fills in some of the "gaps" in Medicare coverage by

providing payment for some of the charges for which Medicare does not have

responsibility due to the applicability of deductibles, coinsurance amounts, or other

limitations imposed by Medicare. It does not include limited benefit coverage available

to Medicare beneficiaries such as "specified disease" or "hospital indemnity" coverage.

Also, it explicitly excludes a policy or plan offered by an employer to employees or

former employees, as well as that offered by a labor organization to members or former

members.

Do not list other supplemental coverage in item 9 and its subdivisions at the time a

Medicare claim is filed. Other supplemental claims are forwarded automatically to the

private insurer if the private insurer contracts with the A/B MAC (B) or DME MAC to

send Medicare claim information electronically. If there is no such contract, the

beneficiary must file his/her own supplemental claim.

Item 9a - Enter the policy and/or group number of the Medigap insured preceded by

MEDIGAP, MG, or MGAP.

NOTE: Item 9d must be completed, even when the provider enters a policy and/or group

number in item 9a.

Item 9b - Form version 08/05: Enter the Medigap insured's 8-digit birth date (MM | DD |

CCYY) and sex.

Form version 02/12: Leave blank.

Item 9c - Leave blank if item 9d is completed. Otherwise, enter the claims processing

address of the Medigap insurer. Use an abbreviated street address, two-letter postal code,

and ZIP code copied from the Medigap insured's Medigap identification card. For

example:

1257 Anywhere Street

Baltimore, MD 21204

is shown as "1257 Anywhere St. MD 21204."

Item 9d - Enter the Coordination of Benefits Agreement (COBA) Medigap-based

Identifier (ID). Refer to chapter 28, section 70.6.4, of this manual for more information.

Items 10a through 10c - Check "YES" or "NO" to indicate whether employment, auto

liability, or other accident involvement applies to one or more of the services described in

item 24. Enter the State postal code. Any item checked "YES" indicates there may be

other insurance primary to Medicare. Identify primary insurance information in item 11.

Item 10d - Use this item exclusively for Medicaid (MCD) information. If the patient is

entitled to Medicaid, enter the patient's Medicaid number preceded by MCD.

Item 11 - THIS ITEM MUST BE COMPLETED, IT IS A REQUIRED FIELD. BY

COMPLETING THIS ITEM, THE PHYSICIAN/SUPPLIER ACKNOWLEDGES

HAVING MADE A GOOD FAITH EFFORT TO DETERMINE WHETHER

MEDICARE IS THE PRIMARY OR SECONDARY PAYER.

If there is insurance primary to Medicare, enter the insured's policy or group number and

proceed to items 11a - 11c. Items 4, 6, and 7 must also be completed.

NOTE: Enter the appropriate information in item 11c if insurance primary to Medicare

is indicated in item 11.

If there is no insurance primary to Medicare, enter the word "NONE" and proceed to item

12.

If the insured reports a terminating event with regard to insurance which had been

primary to Medicare (e.g., insured retired), enter the word "NONE" and proceed to item

11b.

If a lab has collected previously and retained Medicare Secondary Payer (MSP)

information for a beneficiary, the lab may use that information for billing purposes of the

non-face-to-face lab service. If the lab has no MSP information for the beneficiary, the

lab will enter the word “None” in Block 11, when submitting a claim for payment of a

reference lab service. Where there has been no face-to-face encounter with the

beneficiary, the claim will then follow the normal claims process. When a lab has a face-to-face encounter with a beneficiary, the lab is expected to collect the MSP information

and bill accordingly.

Insurance Primary to Medicare - Circumstances under which Medicare payment may

be secondary to other insurance include:

• Group Health Plan Coverage

o Working Aged;

o Disability (Large Group Health Plan); and

o End Stage Renal Disease;

• No Fault and/or Other Liability; and

• Work-Related Illness/Injury:

o Workers' Compensation;

o Black Lung; and

o Veterans Benefits.

NOTE: For a paper claim to be considered for MSP benefits, a copy of the primary

payer's explanation of benefits (EOB) notice must be forwarded along with the claim

form. (See Pub. 100-05, Medicare Secondary Payer Manual, chapter 3.)