US · guidance
CMS Pub. 100-08, ch. 10, § 10.3.1.5.1
Sections 1 through 7 of the Form CMS-855O
A. Basic Information (Section 1)
In this section, the ordering or certifying individual indicates the reason for the application
submittal. Unless otherwise stated in this chapter, in another CMS directive, or as permitted by
PECOS, the ordering or certifying individual may only check one reason for submittal.
With the exception of the voluntary termination checkbox---and except as stated in section
10.6.1.3 of this chapter---any blank data/checkboxes in the Basic Information section can be
verified via any means (e.g., e-mail, telephone, fax).
B. Identifying Information (Section 2)
1. License/Certification/Registration Information
The extent to which the ordering or certifying individual must complete the licensure,
certification, or accreditation information depends upon the individual’s supplier type.
Requirements will vary by supplier type and by location; for instance, some states may require a
particular supplier type to be “certified” but not “licensed,” or vice versa. In general, individuals
will have licensure information to submit. However, a “License Not Applicable” check box is
furnished for cases where a state does not require licensure or, for unlicensed residents, if the
application submission includes either:
(a) A residency contract signed and dated by both an official of the institution and the resident
physician; or
(b) A letter on institution letterhead signed and dated by an official of the institution that (i)
confirms the applicant’s status as a resident physician and (ii) contains, at a minimum, the
applicant’s name.
The only licenses that must be submitted with the application are those required by Medicare or
the state to function as the ordering or certifying supplier type in question. Licenses and permits
not of a medical nature are not required. In addition, cases might arise where the individual need
not be licensed in a particular state at all; however, the contractor shall still ensure that the
supplier meets all applicable state and Medicare requirements.
If the supplier is required to submit a copy of a particular professional or business license,
certification, registration, or degree but fails to do so, the contractor need not obtain such
documentation from the supplier if the contractor can verify the information independently. This
can be done by: (1) reviewing and printing confirming pages from the applicable state,
professional, or school web site; (2) requesting and receiving from the appropriate state,
professional, or educational body written confirmation of the supplier’s status therewith; or (3)
utilizing another third-party verification source. Likewise, if the supplier submits a copy of the
applicable license, certification, registration, or degree but fails to complete the applicable
section of the form, the section need not be completed if the data in question can be verified on
the license/certification itself or via any of the three mechanisms above.
2. Correspondence Address and Telephone Number
The correspondence address must be one at which the contractor can directly contact the
applicant to resolve any issues once the supplier is enrolled in Medicare. It cannot be the address
of a billing agency, management services organization, chain home office, or the supplier’s
representative (e.g., attorney, financial advisor). It can, however, be a P.O. Box or, in the case of
an individual practitioner, the person’s home address. The contractor need not verify the
correspondence address.
The applicant may list any telephone number as the correspondence phone number. The number
need not link to the listed correspondence address. If the supplier fails to list a correspondence
telephone number and the latter is required for the application submission, the contractor shall
develop for this information – preferably via the PCV, e-mail, or fax. The contractor shall accept
a particular phone number if it has no reason to suspect it does not belong to or is not somehow
associated with the supplier. The contractor need not verify the telephone number.
3. E-mail Addresses
An e-mail address listed on the application can be a generic one. It need not be that of a specific
individual. The contractor may accept a particular e-mail address if it has no reason to suspect it
does not belong to or is not somehow associated with the supplier.
4. Drug Enforcement Agency (DEA)
DEA certificates need not be submitted if the applicable DEA information was furnished on the
Form CMS-855. Likewise, if the aforementioned certificates are furnished but the applicable
Form CMS-855 sections are blank, no further development is needed.
C. Final Adverse Legal Actions/Convictions (Section 3)
See section 10.6.6 of this chapter for information regarding final adverse actions. Except as
otherwise stated, the PECOS policies in section 10.3 supersede those in section 10.6.6 (e.g.,
communicating with the provider via the PCV).
D. Medical Specialty Information (Section 4)
The contractor shall validate that any supplier identifying a primary specialty on the Form CMS-
855O has the appropriate medical license. The contractor shall validate the license using the
state’s medical license website. If an active license is not found, the contractor shall develop via
telephone, fax, the PCV, e-mail, or mail to confirm the supplier’s intent and to obtain a copy of
the license, if applicable.
E. Important Address Information (Section 5)
The address information furnished in the Important Address Information section of the Form
CMS-855O helps the contractor contact the supplier directly, if necessary.
F. Contact Person Information (Section 6)
(See section 10.6.9 of this chapter for more information on contact persons. Except as otherwise
stated, the PECOS policies in section 10.3 above supersede those in section 10.6.9.)
If Section 6 is completely blank, the contractor need not develop for this information and can
simply contact the physician or practitioner.
There is no existing option on the Form CMS-855O form to delete a contact person. The
contractor shall therefore accept end-dates of a contact person via phone, the PCV, e-mail, fax,
or mail from the individual or a current contact person on file. The contractor shall document in
PECOS who requested the termination, how it was requested (email, phone or fax), and when it
was requested. The addition of contact persons must still be reported via the Form CMS-855O.
G. Penalties for Falsifying Information (Section 7)
See the Penalties for Falsifying Information section of the Form CMS-855O for the penalties that
apply to suppliers for deliberately furnishing false information on this application to gain or
maintain Medicare enrollment.
History
(Rev. 13355; Issued: 08-13-25; Effective: 05-05-25; Implementation: 05-05-25)
Provenance
- Source
- cms.gov
- Retrieved
- 2026-08-25
- Edition
- iom-2026-08-25
- Content hash
d75dc55745753029b47e4b04c62f2f3d6008d041d4a87896bc98e3b27b0b9c98
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