PECOS and the CMS-855I for Counselors, Step by Step

Medicare enrollment is mostly data entry, and data entry goes wrong in predictable places. This walkthrough follows the order you will actually work in and flags the spots where counselors in particular get stuck. Every procedural fact below comes from CMS's provider enrollment FAQ for marriage and family therapists and mental health counselors (May 2024), its telehealth FAQ (updated February 2026) and the enrollment regulations at 42 CFR Part 424.

Confirm you are eligible first. If you have not read the three-part eligibility test, start there. And decide whether you want to enroll at all, since opting out is the other lawful path; see opt out versus enroll.

Step 1: Get your NPI in order

You need a Type 1 (individual) National Provider Identifier before you can enroll. If you already bill commercial insurance or Medicaid, you have one; CMS is explicit that a practitioner may have only one Type 1 NPI and should use the existing one.

Check your record in NPPES before you start. Three things should match exactly what you will put in PECOS:

• Your legal name, as it appears on your state license.
• Your practice location and mailing address.
• Your taxonomy. CMS's FAQ identifies 101YM0800X as the MHC taxonomy code. Many counselors registered years ago under a different code in the counselor group. Add or update the taxonomy in NPPES so your record reflects mental health counseling.

A mismatch between NPPES and the application is one of the commonest reasons a contractor sends a development letter.

Step 2: Create your I&A account

PECOS sits behind CMS's Identity & Access Management System, the same login used for NPPES. If you set up NPPES yourself, you may already have an account. If someone else will prepare the application for you, they need their own I&A account and an approved connection to your record. They cannot use yours.

Step 3: Choose PECOS or paper

CMS steers practitioners to PECOS, and for counselors the reason is concrete. The PECOS application lists Mental Health Counselor as a specialty. The paper CMS-855I, as of CMS's FAQ, did not; paper filers select "Undefined Non-Physician Practitioner Specialty" in section 2H and write in MHC. If your state licenses you as an LPC, LCPC, LPCC or LCMHC, you still choose MHC, not your state title.

PECOS also lets you track status and answer development requests online. CMS says clean web applications are generally processed within 15 calendar days of receipt and clean paper applications within 30. Neither number is a promise if anything is missing.

Step 4: Work through the application

Identifying information

Name, date of birth, Social Security number, NPI, and your state license: number, state, issue date and expiration date. The license has to be for the state where you will render the services in this enrollment.

Practice location: the telehealth question

This is where solo telehealth counselors pause. The rules from CMS's telehealth FAQ:

• If you have a physical office and sometimes see clients by telehealth from home, you do not need to report your home address. Enroll and bill from the office location.
• If your home is your only practice location, you must enroll it. Mark it "Home office for administrative/telehealth use only." That keeps the street address off your public profile on Care Compare.

You can furnish Medicare telehealth from home either way. The question is only which address goes on the enrollment.

One state per enrollment

CMS requires a separate CMS-855I enrollment in each state where you render services, and a license in each of those states. If you see beneficiaries in two states, you are filing two enrollments and will receive a separate PTAN for each. We cover the multistate version in Medicare across state lines.

Reassignment, if you bill through a group

If a group practice will bill for your services, you reassign your benefits to it. On the paper form the reassignment goes in section 4F, you sign section 15B, and the group's authorized or delegated official signs section 15C. In PECOS it is the Reassignment topic. The group itself must already be enrolled, or enrolling at the same time on a CMS-855B. If you have both a private practice and a group job, you report both: the private practice as your own location and the group as a reassignment.

Group billing has its own sequencing traps; White Glove Credentialing explains them in reassignment of benefits.

Payment: electronic funds transfer

CMS requires new enrollees to receive payment by EFT. Submit the EFT agreement with a voided check or bank letter. If you reassign all of your benefits to a group, you do not submit one, because the group is paid.

Supervised experience documentation

Usually nothing to attach. If your state required supervised experience for your full license, the contractor validates it through the license. If it did not, attach a signed letterhead statement from your employer or from the licensing or national credentialing body confirming 2 years or 3,000 hours. Email confirmations are not accepted.

Contact person

You can name office or credentialing staff as the contact person. The contractor will discuss the pending application with them and nothing else about your Medicare record.

Step 5: Sign it yourself

Only the enrolling practitioner can sign the CMS-855I or the PECOS application, and CMS says the authority to sign cannot be delegated. A credentialing service can prepare everything; you still sign. Counselors who use White Glove Credentialing should expect that step to land on their screen.

There is no application fee for MHCs. CMS classifies MHCs as limited risk, which means license verification and database checks but no site visit.

Step 6: Answer development letters within 30 days

If the contractor needs anything, it sends a development letter, and you have 30 calendar days to respond. No response means the application is rejected and you start again. Watch the email address on the application and the correspondence mailing address as well as PECOS.

Step 7: Read the approval letter carefully

The approval letter carries your PTAN, a Medicare-only number you use with the contractor's portal and phone system. You bill with your NPI, not the PTAN.

Look closely at the effective date. Under 42 CFR 424.520(d), the effective date for a non-physician practitioner is the later of the date you filed an application the contractor later approved, or the date you first began furnishing services at the new location. Under 424.521, you may bill retrospectively for up to 30 days before that date if circumstances precluded enrolling in advance, and up to 90 days where a presidentially declared disaster did. In plain terms: file before you start seeing Medicare beneficiaries, not after. Services delivered months before you filed are not billable.

After you are enrolled

• Keep the record current. A new practice location, a new group, a lapsed license or a move all require updates.
• Revalidate. Most providers revalidate every five years. CMS posts due dates on its revalidation list seven months ahead, and the contractor sends notice three to four months before. Missing it can mean a payment hold or deactivation, and Medicare will not pay for services during a deactivation period. White Glove Credentialing has more in Medicare revalidation.
• Medicare Advantage is separate. Enrolling in traditional Medicare does not put you in any Medicare Advantage network. Each plan credentials you on its own. See Medicare Advantage versus traditional Medicare.
• Medicaid is separate too. CMS notes that Medicaid enrollment does not enroll you in Medicare, and some Medicare Advantage plans and state Medicaid agencies require Medicare enrollment first.

Where the license fits

Every one of these steps assumes a current, unrestricted counseling license in the state where the beneficiary is. That is the part we handle. The enrollment itself is White Glove Credentialing's work; their PECOS enrollment guide covers the general process for all provider types, and they can file on your behalf up to the signature. If the license for a second state is the missing piece, see our pricing.