Becoming a nurse practitioner means assembling a stack of credentials — a state license, a national certification, an NPI, a DEA registration, sometimes a state controlled-substance registration, and a collaborating agreement — each from a different authority, each on its own clock. Get the order wrong and applications stall. Here's the sequence that actually works, and the three numbers people constantly confuse.
First, the Three Numbers That Aren't the Same
Half the confusion comes from treating three distinct identifiers as one:
- Your state license number— issued by your state board of nursing. This is your legal authority to practice as an APRN, and it's the number the DEA application asks for.
- Your certification number— issued by your certifying body (AANPCB for the "-C" credential, ANCC for "-BC"). This is a national exam credential, nota license. DEA and NPI forms don't ask for it.
- Your NPI — issued by CMS/NPPES. A billing and identification number, separate from both of the above.
When a comment thread says "AANP gave me a certification number, not a license number" — that's exactly right, and they're two different things from two different organizations.
The Myth: "You Need a New NPI to Become an NP"
You don't. You get one NPI for life. If you already have an NPI as an RN, you keep it — you log into NPPES and updatethe record: add your nurse-practitioner taxonomy code (you can hold both your RN and NP taxonomies on the one NPI, with the NP set as primary) and your new state APRN license information. CMS is explicit that an individual has only one NPI and it doesn't change when your role or practice setting changes. If you never had one, you apply free at NPPES (nppes.cms.hhs.gov) — about 10 business days online.
The Order of Operations
Roughly in this sequence, though several steps overlap:
- National certification (AANPCB or ANCC). In most states this is a prerequisitefor the APRN license, so it comes first or alongside licensure — you typically can't get the state license without it.
- State APRN / NP license from your board of nursing. This is the foundation everything else builds on.
- NPI— get one (or update your existing RN NPI) with your NP taxonomy and license. You'll want it in place for the steps below and for payer credentialing, even though the DEA form itself doesn't ask for it.
- State prescriptive authority — and, in some states, a separate state controlled-substance registration (CSR/CDS). This is state-dependent: many states don't have a separate state CSR, but where one exists it generally must be in place before the federal DEA. (See the DEA registration guide for which states require their own.)
- Federal DEA registration — $888 for three years. Its prerequisite is your state authority to handle controlled substances, not your NPI. At application you complete the one-time 8-hour MATE trainingattestation (once, ever — it won't reappear at renewal).
- Collaborating-physician agreement (in reduced- and restricted-practice states) and payer credentialing (CAQH, then each insurer). These are the slow tail — start them as early as your license allows.
The Chicken-and-Egg Trap (and How to Beat It)
The most-asked question from new NPs: "Can I apply for my DEA without a job yet — I don't have a practice address?" The DEA registration is tied to a physical practice location, so practically you register once you have a confirmed work address. Two cautions nurses learn the hard way:
- Don't use your home address on the DEA (or your NPI) unless you have to — it becomes publicly searchable. Nurses report patients showing up at their door. Update it to your practice address once employed.
- Don't rush the $888.It's a three-year registration tied to where you work; if you're between jobs or taking leave, you can wait. (The fee is non-refundable as a default, though the DEA can refund genuine processing errors.)
Keep the Stack Straight
Once you're practicing, these credentials renew on four different clocks: state APRN license, national certification, DEA (every 3 years), and any state CSR — plus the CE each one demands. That's exactly the multi-credential tracking RenewRN is built for. For the bigger picture on how APRN renewal differs from RN, see the APRN vs RN requirements guide.
Sources
- CMS NPPES — NPI uniqueness (one per individual), taxonomy update, free application (nppes.cms.hhs.gov; CMS NPI booklet)
- DEA Diversion Control — registration prerequisites (state authority), MATE Act one-time 8-hour training, $888/3-yr fee
- AANPCB / ANCC — certification (distinct from state license)
General guidance, verified June 2026 — credentialing specifics vary by state and employer; confirm with your board, the DEA, and NPPES before relying on them.