PTAN number: what it is and how to get one

What is a PTAN number in Medicare?

“For Part A providers, the Medicare identification number is the CMS Certification Number (CCN). For Part B suppliers the Medicare identification number is the Provider Transaction Access Number (PTAN).”

Physicians, nurse practitioners, PAs and therapists enroll in Part B on the CMS-855I, and their groups on the CMS-855B, so their Medicare number is the PTAN. The contractor issues it through PECOS, CMS’s enrollment system, which works out “how many PTANs are required for the enrollment situation in question and the associated effective date(s)” (§10.3(B)).

CMS’s 2009 instruction to contractors’ call centers gives no single PTAN format: it has them check “the correct number of alpha-numeric characters based upon the PTAN entered” and adds: “PTAN validation can vary by contractor site.” Copy the PTAN exactly as your letter prints it.

What is the difference between a PTAN and an NPI?

• NPI. NPPES issues it, and CMS says it “will not change, even if your name, address, taxonomy, or other information changes.” In HIPAA standard transactions, “the NPI must be used in place of other provider identifiers, such as a Provider Transaction Access Number (PTAN).” An NPI alone doesn’t enroll you in Medicare or in any health plan (NPI setup).
• PTAN. The three-number check on inquiries dates from CMS Transmittal 25, effective April 6, 2009, and First Coast’s contact center takes “up to three inquiries for only one NPI / PTAN combination per call.”
• One NPI, several PTANs. The same transmittal tells phone systems to “accept any valid and associated PTAN” for an NPI that has more than one.
• The pairing still matters for payment. When claims fail “due solely to an incorrect NPI-PTAN combination” in PECOS, the contractor asks for a CMS-855 change of information to correct it (§10.6.10(C)).

Sources: CMS Program Integrity Manual ch. 10; CMS ICN 902603 (August 2014); 45 CFR 162.410; Palmetto GBA (July 22, 2026); CMS public enrollment file (October 2026).

Where can you find your PTAN number?

On the approval letter. CMS’s model letter for a clinician joining a group lists the individual’s name, specialty, NPI and PTAN, then the group’s legal business name, NPI and PTAN, and the reassignment effective date. The letters also point you to PECOS to “view your existing enrollment information”.

There is no public PTAN search. CMS’s public enrollment file (October 2026 release) gives each enrollment’s NPI, PECOS associate ID, enrollment ID, provider type, state and name, with no PTAN field, and no public tool turns an NPI into a PTAN. First Coast’s enrollment status lookup searches applications by NPI or PTAN, or by a 9- or 10-digit document control number, and shows where an application stands.

How do you get a PTAN number?

You don’t apply for one on its own: the contractor issues the PTAN when it approves your Medicare enrollment. Which CMS-855 application fits your situation, and CMS’s processing targets, are on our Medicare enrollment page.

• No extras on request. On a paper application the contractor assigns only “the minimum number of PTANs necessary to ensure that proper payments are made”, never one just because you ask (hospital departments aside); in PECOS, the system decides (§10.6.10(B)).
• None for an ordering-only enrollment. The CMS-855O approval letter lists the name, specialty, NPI and effective date, and says: “You may not send billed services claims.”

Does each provider in a group get a Medicare PTAN?

Yes. Each clinician who reassigns benefits to a group gets an individual PTAN tied to it, and the group has its own. Joining another group creates a new reassignment, one of CMS’s own examples of a change that issues a new PTAN (§10.7(A)), so a clinician in two groups holds a PTAN for each.

Florida holds 189,932 of the file’s 3,030,022 records (6.3%). How NPs and PAs enroll is on NP and PA credentialing, and how therapists enroll on mental health credentialing.

If the group’s own enrollment is deactivated or revoked, the contractor end-dates every reassignment to it, and the PTANs that go with them, on that same date, while each clinician’s own enrollment stays approved. The group’s letter warns that members’ enrollment “may be deactivated if they fail to update their enrollment record within 90 calendar days” (§10.3.1.4(G)).

What changes a Medicare PTAN number?

• A new office in another fee locality. “The group will only be issued a new PTAN if the new location is in a separate fee locality”, and then each clinician who reassigns to the group and wants to bill from that office needs a new PTAN too (§10.3.1.4). Florida has three physician fee schedule localities: Miami (Miami-Dade and Monroe), Fort Lauderdale (Broward, Collier, Indian River, Lee, Martin, Palm Beach and St. Lucie) and the rest of the state. A change letter that issues a new PTAN must carry an effective date and appeal rights (§10.7(A)).
• Collapsing PTANs. When you revalidate, you can ask to combine PTANs; the contractor does it “if appropriate (based on payment localities, etc.)” (§10.4.5.3(A)).
• A deactivation. CMS can deactivate billing privileges after 6 consecutive calendar months without a Medicare claim, a change not reported in time, or a revalidation not completed within 90 days of CMS’s request, among other reasons (42 CFR 424.540(a)). Keeping revalidation on schedule is part of recredentialing.

What happens to the number at reactivation is where the manual gives two answers:

• A new PTAN. Section 10.4.6(A)(2), on reactivating CMS-855I and CMS-855B suppliers that aren’t state-certified (which include physicians, practitioners and their groups): “upon reactivating a Part B non-certified supplier, the contractor shall issue a new PTAN”; in PECOS it is issued automatically.
• The original PTAN. Section 10.4.5.3(C)(1), on a provider deactivated for not answering a revalidation request: “The provider shall maintain their original PTAN”, with the gap between deactivation and reactivation recorded on it. Where that applies, CMS’s model reactivation letters add: “While your PTAN(s) and effective date(s) remain the same, you will have a gap in billing privileges”.

Both instructions are in the current manual. If you are reactivating, ask First Coast which one it applied, and update your records from the new letter.

How does a railroad Medicare PTAN work?

Railroad Medicare has its own contractor, Palmetto GBA, and its own PTAN. Palmetto GBA assigns it through its PTAN Lookup and Request Tool, from your local Part B PTAN, your NPI and the last five digits of your TIN.

• When to ask: wait 14 business days after the local PTAN is assigned, and request a Railroad PTAN only when you have a claim for a Railroad Medicare patient.
• How long: a request that needs research can take 30 days.
• Groups: a group’s Railroad PTAN is created with its first member’s.
• Questions: 888-355-9165, option 3.

What you can do today

1. Pull the approval letter for each clinician and for the group, and record each NPI, PTAN and effective date in your credentialing file.
2. Compare each effective date with the clinician’s first Medicare visit. A reconsideration request must reach First Coast in writing within 65 calendar days of the letter’s date.
3. Store each clinician’s NPI, PTAN and the last 5 digits of the tax ID with First Coast’s Part B lines: 1-877-847-4992 (phone system) and 1-866-454-9007 (contact center for Florida).
4. Before signing a lease for a second office, check its county against First Coast’s payment localities by county, then report the new location within 30 days (42 CFR 424.516(d)); most other changes are due within 90.
5. If you treat Railroad Medicare patients, bookmark Palmetto GBA’s PTAN tool FAQs and note the date each local PTAN was assigned.

Advixor’s Medicare enrollment service covers initial enrollment, revalidation and payer-required changes such as provider additions and terminations.