INSTRUCTIONS FOR COMPLETING THE CERTIFICATE OF MEDICAL NECESSITY
FOR OXYGEN
SECTION A:
CERTIFICATION
DATE:
PATIENT
INFORMATION:
SUPPLIER
INFORMATION:
PLACE OF SERVICE:
FACILITY NAME:
SUPPLY ITEM/SERVICE
PROCEDURE CODE(S):
PATIENT DOB, HEIGHT,
WEIGHT AND SEX:
PHYSICIAN NAME,
ADDRESS:
PHYSICIAN
INFORMATION:
PHYSICIAN’S
TELEPHONE NO:
SECTION B:
EST. LENGTH OF NEED:
DIAGNOSIS CODES:
QUESTION SECTION:
NAME OF PERSON
ANSWERING SECTION
B QUESTIONS:
SECTION C:
NARRATIVE
DESCRIPTION OF
EQUIPMENT & COST:
SECTION D: PHYSICIAN
ATTESTATION:
PHYSICIAN SIGNATURE
AND DATE:
(May be completed by the supplier)
If this is an initial certification for this patient, indicate this by
placing date (MM/DD/YY) needed initially in the space TYPE/
marked “INITIAL.” If this is a revised certification (to be completed when the physician changes the order, based on the patient’s
changing clinical needs), indicate the initial date needed in the space marked “INITIAL,” and indicate the recertification date in the
space marked “REVISED.” If this is a recertification, indicate the initial date needed in the space marked “INITIAL,” and indicate the
recertification date in the space marked “RECERTIFICATION.” Whether submitting a REVISED or a RECERTIFIED CMN, be sure to
always furnish the INITIAL date as well as the REVISED or RECERTIFICATION date.
Indicate the patient’s name, permanent legal address, telephone number and his/her Medicare ID as it appears on his/her
Medicare card and on the claim form.
Indicate the name of your company (supplier name), address and telephone number along with the Medicare Supplier Number
assigned to you by the National Supplier Clearinghouse (NSC) or applicable National Provider Identifier (NPI). If using the NPI
Number, indicate this by using the qualifier XX followed by the 10-digit number. If using a legacy number,
e.g. NSC number, use the qualifier 1C followed by the 10-digit number. (For example. 1Cxxxxxxxxxx)
Indicate the place in which the item is being used, i.e., patient’s home is 12, skilled nursing facility (SNF) is 31, End Stage Renal
Disease (ESRD) facility is 65, etc.
If the place of service is a facility, indicate the name and complete address of the facility.
List all procedure codes for items ordered. Procedure codes that do not require certification should not be listed on the CMN.
Indicate patient’s date of birth (MM/DD/YY) and sex (male or female); height in inches and weight in pounds, if requested.
Indicate the PHYSICIAN’S name and complete mailing address.
Accurately indicate the treating physician’s Unique Physician Identification Number (UPIN) or applicable National Provider Identifier
(NPI). If using the NPI Number, indicate this by using the qualifier XX followed by the 10-digit number. If using UPIN number, use
the qualifier 1G followed by the 6-digit number. (For example. 1Gxxxxxx)
Indicate the telephone number where the physician can be contacted (preferably where records would be accessible pertaining to
this patient) if more information is needed.
(May not be completed by the supplier. While this section may be completed by a non-physician clinician, or a Physician employee,
it must be reviewed, and the CMN signed (in Section D) by the treating practitioner.)
Indicate the estimated length of need (the length of time the physician expects the patient to require use of the ordered item) by
filling in the appropriate number of months. If the patient will require the item for the duration of his/her life, then enter “99”.
In the first space, list the diagnosis code that represents the primary reason for ordering this item. List any additional diagnosis
codes that would further describe the medical need for the item (up to 4 codes).
This section is used to gather clinical information to help Medicare determine the medical necessity for the item(s) being ordered.
Answer each question which applies to the items ordered, checking “Y” for yes, “N” for no, or “D” for does not apply.
If a clinical professional other than the treating physician (e.g., home health nurse, physical therapist, dietician) or a physician
employee answers the questions of Section B, he/she must print his/her name, give his/her professional title and the name of his/
her employer where indicated. If the physician is answering the questions, this space may be left blank.
(To be completed by the supplier)
Supplier gives (1) a narrative description of the item(s) ordered, as well as all options, accessories, supplies and drugs;
(2) the supplier’s charge for each item(s), options, accessories, supplies and drugs;
and (3) the Medicare fee schedule allowance for
each item(s), options, accessories, supplies and drugs, if applicable.
(To be completed by the physician)
The physician’s signature certifies (1) the CMN
which he/she is reviewing includes Sections A, B, C and D; (2) the answers in Section
B are correct; and (3) the self-identifying information in Section A is
correct.
After completion and/or review by the physician of Sections A, B and C, the physician’s must sign and date the CMN in Section D,
verifying the Attestation appearing in this Section. The physician’s signature also certifies
the items ordered are medically necessary
for this patient.
According to the Paperwork Reduction Act of 1995, no persons are required to respond to a collection of information unless it displays a valid OMB control number. The valid OMB control number for
this information collection is 0938-0679. The time required to complete this information collection is estimated to average 12 minutes per response, including the time to review instructions, search existing
resources, gather the data needed, and complete and review the information collection. If you have any comments concerning the accuracy of the time estimate or suggestions for improving this form,
please write to: CMS, Attn: PRA Reports Clearance Officer, 7500 Security Blvd. Baltimore, Maryland 21244.
DO NOT SUBMIT CLAIMS TO THIS ADDRESS. Please see http://www.medicare.gov/ for information on claim filing.
Form CMS-484 (12/18) INSTRUCTIONS
