A “clean” claim is one that does not require the carrier or FI to investigate or develop external to their Medicare operation on a prepayment basis. Clean claims must be filed in the timely filing period.
The following bullets are some examples of what are considered clean claims:

• Pass all edits (contractor and Common Working File (CWF)) and are processed electronically);

• Not require external development (i.e., are investigated within the claims, medical review, or payment office without the need to contact the provider, the beneficiary, or other outside source) (Note: these claims are not included in CPE scoring).

Clean claim submission - coding review

• Claims not approved for payment by CWF within 7 days of the FI’s original claim submittal for reasons beyond the carrier’s, FI’s or provider’s control (e.g., CWF system/communication difficulties);

• CWF out-of-service area (OSA) claims. These are claims where the beneficiary is not on the CWF host and CWF has to locate and identify where the beneficiary record resides;

• Claims subject to medical review but complete medical evidence is attached by the provider or forwarded simultaneously with EMC records in accordance with the carrier’s or FI’s instructions;
• Are developed on a postpayment basis; and,

• Have all basic information necessary to adjudicate the claim, and all required supporting documentation

1. Clean claim defined: 

A clean claim has no defect, impropriety or special circumstance, including incomplete documentation that delays timely payment. A provider submits a clean claim by providing the required data elements on the standard claims forms, along with any attachments and additional elements, or revisions to data elements, attachments and additional elements, of which the provider has knowledge. Claims for inpatient and facility programs and services are to be submitted on the UB-04 and claims for individual professional procedures and services are to be submitted on the CMS-1500. State guidelines may supersede these requirements. In addition, claims may be submitted electronically through a contracted clearinghouse or on Magellan’s Webbased claims submission application. Magellan does not typically, but may require attachments or other information in addition to these standard forms (as noted below). Magellan may request treatment records for review.

2. Required clean claim elements: 

The Centers for Medicare and Medicaid Services (CMS) developed claim forms that record the information needed to process and generate provider reimbursement. The required elements of a clean claim must be complete, legible and accurate.

Clean and Unclean Claims

Because UnitedHealthcare Oxford processes claims according to state and federal requirements, a “clean claim” is defined as a complete claim or an itemized bill that does not require any additional information to process it. A clean claim includes at least all of the following*:

• Patient name and UnitedHealthcare Oxford Member ID number

• UnitedHealthcare Oxford provider ID number

• Provider information, including federal tax ID number (FTIN)

• Date of service (DOS)

• Place of service

• Diagnosis code

• Procedure code

• Individual charge for each service

• Provider signature

*More specific requirements are set forth below.

An “unclean claim” is defined as an incomplete claim, a claim that is missing any of the above information, or a claim that has been suspended in order to get more information from the provider. If you submit incomplete or inaccurate information, we may reject the claim, delay processing or make a payment determination (e.g., denial, reduced payment) that may be adjusted later when complete information is obtained.

UnitedHealthcare Oxford applies the appropriate state and federal guidelines to determine whether the claim is clean.



CMS-1500

In the following line item description, the parenthetical information following each term is a reference to the field number to which that term corresponds on the CMS-1500 claim form.

 Subscriber’s/patient’s plan ID number (field 1a);
• Patient’s name (field 2);
• Patient’s date of birth and gender (field 3);
• Subscriber’s name (field 4);
• Patient’s address (street or P.O. Box, city, zip) (field 5);
• Patient’s relationship to subscriber (field 6);
• Subscriber’s address (street or P.O. Box, City, Zip Code) (field 7);
• Whether patient’s condition is related to employment, auto accident, or other accident (field 10);
• Subscriber’s policy number (field 11);
• Subscriber’s birth date and gender (field 11a);
• HMO or preferred provider carrier name (field 11c);
• Disclosure of any other health benefit plans (field 11d);
• Patient’s or authorized person’s signature or notation that the signature is on file with the physician or provider (field 12);
• Subscriber’s or authorized person’s signature or notation that the signature is on file with the physician or provider (field 13);
• Date of current illness, injury, or pregnancy (field 14);
• First date of previous, same or similar illness (field 15);
• Name of Referring Provider or Other Source (field 17);
• Referring Provider NPI Number (field 17b);
• Diagnosis codes or nature of illness or injury (current ICD-10 codes are required effective 10/1/15) (field 21);
• Date(s) of service (field 24A);
• Place of service codes (field 24B);
• EMG (field 24C);
• Procedure/modifier code (current CPT or HCPCS codes are required) (field 24D);
• Diagnosis code (ICD-10 codes are required effective 10/1/15) by specific service (field 24E);
• Charge for each listed service (field 24F);
• Number of days or units (field 24G);
• Rendering provider NPI (field 24J);
• Physician’s or provider’s federal taxpayer ID number (field 25);
• Total charge (field 28);
• Signature of physician or provider that rendered service, including indication of professional license (e.g., MD, LCSW, etc.) or notation that the signature is on file with the HMO or preferred provider carrier (field 31);
• Name and address of facility where services rendered (if other than home or office) (field 32);
• The service facility Type 1 NPI (if different from main or billing NPI) (field 32a);
• Physician’s or provider’s billing name and address (field 33); and
• Main or billing Type 1 NPI number (field 33a)

Medicare definition – Clean claim

A “clean” claim is one that does not require the carrier or FI to investigate or develop external to their Medicare operation on a prepayment basis. Clean claims must be filed in the timely filing period.

The following bullets are some examples of what are considered clean claims:

• Pass all edits (contractor and Common Working File (CWF)) and are processed electronically);

• Not require external development (i.e., are investigated within the claims, medical review, or
payment office without the need to contact the provider, the beneficiary, or other outside source) (Note: these claims are not included in CPE scoring).

• Claims not approved for payment by CWF within 7 days of the FI’s original claim submittal for reasons beyond the carrier’s, FI’s or provider’s control (e.g., CWF system/communication difficulties);

• CWF out-of-service area (OSA) claims. These are claims where the beneficiary is not on the CWF host and CWF has to locate and identify where the beneficiary record resides;

• Claims subject to medical review but complete medical evidence is attached by the provider or forwarded simultaneously with EMC records in accordance with the carrier’s or FI’s instructions;

• Are developed on a postpayment basis; and,

• Have all basic information necessary to adjudicate the claim, and all required supporting documentation

The receipt date of a claim is the date the contractor receives the claim (provided the filing is in a format and contains data sufficiently complete so that the filing qualifies as a claim). The receipt date is used to: determine if the claim was timely filed (see §70.3), determine the “payment floor” for the claim (see §80.2.1.2), determine the “payment ceiling” on the claim (see §80.2.1.1) and, when applicable, to calculate interest payment due for a clean claim that is not timely processed, and to report to CMS statistical data on claims, such as in workload reports.

A paper claim that is received by 5:00 p.m. on a business day, or by closing time if the contractor routinely ends its public business day between 4:00 p.m. and 5:00 p.m., must be considered as received on that date, even if the contractor does not open the envelope which contains the claim or does not enter the claims data into the claims processing system until a later date. A paper claim that is received after 5:00 p.m., or after the contractor’s routine close of business between 4:00 p.m. and 5:00 p.m., is considered as received on the next business day.

A paper claim is considered as received if it is delivered to the contractor’s place of business by the U.S. Postal Service, picked up from a P.O. box, or is otherwise delivered to the contractor’s place of business by its routine close of business time. If the contractor uses a P.O. box for receipt of mailed claims, it must have its mail picked up from its box at least once per business day unless precluded on a particular day by the emergency closing of its place of business or that of its postal box site. As electronic claim tapes and diskettes that may be submitted by providers or their agents to an FI are also subject to manual delivery, rather than direct electronic transmission, the paper claim receipt rule also applies to establish the date of receipt of claims submitted on such manually delivered tapes and diskettes.

All claims (i.e., paid claims, partial and complete denials, no payment bills) including PIP and EMC claims are subject to the above requirements.

Interest must be paid on claims that are not paid within the ceiling period. The count starts on the day after the receipt date and it ends on the date payment is made. For example, for clean claims received October 1, 1993, and later, if this span is 30 days or less, the requirement is met.

The RAPs submitted by home health agencies under the HH PPS (records with type of bill 322 or 332 and dates of service on or after October 1, 2000) are not Medicare claims as defined under the Social Security Act. Since they are not considered claims, they (records with type of bill 322 or 332 and dates of service on or after October 1, 2000) are not subjected to payment ceiling standards and interest payment.

See Chapter 24, § 30.2 for definitions of electronic and paper claims for use in application of the Medicare payment floor. See Chapter 1, § 80.2.1.2 for differentiation between electronic claims that comply with the requirements of the standard implementation guides adopted for national use under HIPAA and those submitted electronically using pre-HIPAA formats supported by Medicare. This HIPAA format differentiation applies to the payment floor, but not to the ceiling.

The “payment floor” establishes a waiting period during which time the contractor may not pay, issue, mail, or otherwise finalize the initial determination on a clean claim. The “payment floor date” is the earliest day after receipt of the clean claim that payment may be made.

The payment floor date is determined by counting the number of days since the day the claim was received, i.e., the count begins the day after the day of receipt. There are different waiting periods, and thus different payment floor dates, for electronic claims and paper claims. The waiting periods are 13 days for electronic claims and 26 days for paper claims. For the purpose of implementing the payment floor, the following definitions apply:

An “electronic claim” is a claim submitted via central processing unit (CPU) to CPU transmission, tape, direct data entry, direct wire, or personal computer upload or download. A claim that is submitted via digital FAX/OCR, diskette, or touch-tone telephone is not considered as an electronic claim.

A “paper claim” is submitted and received on paper, including fax print-outs. This also includes a claim that the contractor receives on paper and then reads electronically with OCR technology.


Claims Paid Upon Appeal

Interest payments are not payable on clean claims initially processed to denial and on which payment is made subsequent to the initial decision as a result of an appeal request. This applies to appeals where more than the applicable number of days elapsed before an initial denial, but the claim was later paid upon appeal

Contractors shall report the number of other-than-clean claims processed in 45 days or less on Form Y of the Contractor Reporting of Operational and Workload Data (CROWD) report. Use identifier code “0005” in column 1 to report this information. Report the number of other-than-clean claims processed in 46 days or longer on Form Y of the CROWD system, under column 1 on a line using code “0006” as the identifier.


Condition Codes

12-14 – Not currently used by Medicare.
15 – Clean claim is delayed in CMS Processing System.
16 – SNF Transition exception.
60 – Operating Cost Day Outlier.
61 – Operating Cost Outlier.
62 – PIP Bill.
63 – Bypass CWF edits for incarcerated beneficiaries. Indicates services rendered to a prisoner or a patient in State or local custody meets the requirement of 42 CFR 411.4(b) for payment.
64 – Other Than Clean Claim.
65 – Non-PPS Bill.
98 – Data Associated With DRG 468 Has Been Validated.
EY – Lung Reduction Study Demonstration Claims.
M0 – All-Inclusive Rate for Outpatient – Used by a Critical Access Hospital electing to be paid an all-inclusive rate for outpatient services.
M1 – Roster Billed Influenza Virus Vaccine or Pneumococcal Pneumonia Vaccine (PPV).

Code indicates the influenza virus vaccine or pneumonia vaccine (PPV) is being billed via the roster billing method by providers that mass immunize.

M2 – Allows Home Health claims to process if provider reimbursement > $150,000.00.
HHA Payment Significantly Exceeds Total Charges. Used when payment to an HHA is significantly in excess of covered billed charges.
M3 – SNF 3 Day stay bypass for NG/Pioneer ACO waiver.
M4 – M9 Not used by Medicare.
MA – GI Bleed.
MB – Pneumonia.
MC – Pericarditis.
MD – Myelodysplastic Syndrome.
ME – Hereditary Hemolytic and Sickle Cell Anemia.
MF – Monoclonal Gammopathy.
MG – Grandfathered Tribal Federally Qualified Health Centers.
MH-MT – Not currently used by Medicare.
MZ – IOCE error code bypass
UU – Not currently used by Medicare


Clean Claim A claim that can be processed without obtaining additional information from the provider of the service or its designated representative. It includes a claim with errors originating in a state’s claims system. It does not include a claim from a provider who is under investigation for fraud or abuse, or a claim under review for medical necessity.