US · guidance
CMS Pub. 100-04, ch. 25, § 75.6
Form Locators 66-81
FL 66 – Diagnosis and Procedure code Qualifier (ICD Version Indicator)
Required. The qualifier that denotes the version of International Classification of Diseases
(ICD) reported. The following qualifier codes reflect the edition portion of the ICD: 9 -
Ninth Revision, 0 - Tenth Revision.
FL 67 - Principal Diagnosis Code
Required. The hospital enters the ICD code for the principal diagnosis. The code must be
the full ICD diagnosis code, including all five digits where applicable for ICD-9 or all seven
digits for ICD-10. The reporting of the decimal between the third and fourth digit is
unnecessary because it is implied.
The principal diagnosis code will include the use of “V” codes where ICD-9-CM is
applicable. Where the proper code has fewer than five digits (ICD-9-CM) or seven digits
(ICD-10-CM), the hospital may not fill with zeros. The principal diagnosis is the condition
established after study to be chiefly responsible for this admission. Even though another
diagnosis may be more severe than the principal diagnosis, the hospital enters the principal
diagnosis. Entering any other diagnosis may result in incorrect assignment of a Diagnosis
Related Group (DRG) and cause the hospital to be incorrectly paid under PPS. The hospital
reports the full ICD code for the diagnosis shown to be chiefly responsible for the outpatient
services in FL 67 of the bill. It reports the diagnosis to its highest degree of certainty. For
instance, if the patient is seen on an outpatient basis for an evaluation of a symptom (e.g.,
cough) for which a definitive diagnosis is not made, the symptom must be reported. If during
the course of the outpatient evaluation and treatment a definitive diagnosis is made (e.g.,
acute bronchitis), the hospital must report the definitive diagnosis. When a patient arrives at
the hospital for examination or testing without a referring diagnosis and cannot provide a
complaint, symptom, or diagnosis, the hospital should report an ICD code for Persons
Without Reported Diagnosis Encountered During Examination and Investigation of
Individuals and Populations.
FLs 67A-67Q - Other Diagnosis Codes
Situational. Required when other condition(s) coexist or develop(s) subsequently during the
patient’s treatment.
FL 68 – Reserved
Not used. Data entered will be ignored.
FL 69 - Admitting Diagnosis
Required. For inpatient hospital claims subject to QIO review, the admitting diagnosis is
required. Admitting diagnosis is the condition identified by the physician at the time of the
patient’s admission requiring hospitalization.
FL70A – 70C - Patient’s Reason for Visit
Situational. It is required for Medicare institutional claims processing on Type of Bill
013x and 085x when: a) Form Locator 14 (Priority (Type) of Admission or Visit) codes
1, 2, or 5 are reported; and b) Revenue Codes 045x, 0516, or 0762 are reported. The
requirement for reporting Patient’s Reason for Visit is restricted to the outpatient bill
types above.
If the Patient’s Reason for Visit is not required, it may be reported on other 013x and
085x bill types that fail to meet the criteria in a) or b) above at the sender’s discretion
when this information substantiates the medical necessity of services.
FL71 – Prospective Payment System (PPS) Code
Not used. Data entered will be ignored.
FL72 - External Cause of Injury (ECI) Codes
Not used. Data entered will be ignored.
FL 73 – Reserved
Not used. Data entered will be ignored.
FL 74 - Principal Procedure Code and Date
Situational. Required on inpatient claims when a procedure was performed. Not used on
outpatient claims.
FL 74A – 74E - Other Procedure Codes and Dates
Situational. Required on inpatient claims when additional procedures must be reported. Not
used on outpatient claims.
FL 75 – Reserved
Not used. Data entered will be ignored.
FL 76 - Attending Provider Name and Identifiers (including NPI)
Situational. Required when claim/encounter contains any services other than nonscheduled
transportation services. If not required, do not send. The attending provider is the individual
who has overall responsibility for the patient’s medical care and treatment reported in this
claim/ encounter.
Secondary Identifier Qualifiers:
0B - State License Number
1G - Provider UPIN Number
G2 – Provider Commercial Number
FL 77 - Operating Provider Name and Identifiers (including NPI)
Situational. Required when a surgical procedure code is listed on this claim. If not required,
do not send. The name and identification number of the individual with the primary
responsibility for performing the surgical procedure(s).
Secondary Identifier Qualifiers:
0B - State License Number
1G - Provider UPIN Number
G2 – Provider Commercial Number
FLs 78 and 79 - Other Provider Name and Identifiers (including NPI)
Situational. The name and ID number of the individual corresponding to the qualifier
category indicated in this section of the claim.
Provider Type Qualifier Codes/Definition/Situational Usage Notes:
DN - Referring Provider. The provider who sends the patient to another provider for services.
Required on an outpatient claim when the Referring Provider is different than the Attending
Physician. If not required, do not send.
ZZ - Other Operating Physician. An individual performing a secondary surgical procedure or
assisting the Operating Physician. Required when another Operating Physician is involved.
If not required, do not send.
82 - Rendering Provider. The health care professional who delivers or completes a particular
medical service or non-surgical procedure. Report when state or federal regulatory
requirements call for a combined claim, i.e., a claim that includes both facility and
professional fee components (e.g., a Medicaid clinic bill or Critical Access Hospital claim).
If not required, do not send.
Secondary Identifier Qualifiers:
0B - State License Number
1G - Provider UPIN Number
G2 – Provider Commercial Number
FL 80 – Remarks
Situational. For DME billings the provider shows the rental rate, cost, and anticipated
months of usage so that the provider’s A/B MAC (A or HHH) may determine whether to
approve the rental or purchase of the equipment. Where Medicare is not the primary payer
because WC, automobile medical, no-fault, liability insurer or an EGHP is primary, the
provider enters special annotations. In addition, the provider enters any remarks needed to
provide information that is not shown elsewhere on the bill but which is necessary for proper
payment. For Renal Dialysis Facilities, the provider enters the first month of the 30-month
period during which Medicare benefits are secondary to benefits payable under an EGHP.
(See Occurrence Code 33.)
FL 81 - Code-Code Field
Situational. To report additional codes related to a Form Locator or to report external code
list approved by the NUBC for inclusion to the institutional data set.
Codes used for Medicare claims are available from Medicare contractors. Codes are also
available from the NUBC (www.nubc.org) via the NUBC’s Official UB-04 Data
Specifications Manual.
80 – Reserved
History
(Rev. 3435, Issued: 12-31-15, Effective: 07-01-15, Implementation: 03-31-16)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
00d3c4d08eaef693e9299b0c45c21dcebb8a4a341a5ab1ebe1d83044f5823ae6
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