Why Search by Medical License Number?
A medical license number is assigned by a state licensing authority. Searching by that number can be more precise than searching by name, especially when several physicians share a common name.
The number is not a nationwide identifier. A physician licensed in several states will usually have a separate number for each state, and two states may use similar number formats. For the most accurate search, pair the complete license number with the issuing state.
Editorial note: DoctorLicenseLookup.com is an independent search platform that organizes publicly available licensing information. It is not a government agency or the final source for official verification. Available fields and update times vary by state. Confirm important information with the applicable state licensing authority.
How to Look Up a Doctor by License Number
Step 1: Copy the complete number
Use the number exactly as it appears on the source document. Include any letters, prefixes, suffixes, hyphens, and leading zeros. For example, A012345, MD-12345, and 0012345 should not automatically be treated as the same number.
Avoid guessing a missing digit. If part of the number is unreadable, search by the physician's name first and compare the results.
Step 2: Identify the issuing state
Look for the state name near the number. If it is not shown, use the physician's practice location as a starting clue, but do not assume that the practice address and issuing state are always the same. A physician may hold several state licenses or work remotely.
Step 3: Run the number search
Go to DoctorLicenseLookup.com, choose License Number, enter the complete value, and select the state when that option is available.
If you already know the jurisdiction, you can start on a state page such as the Colorado physician license lookup or Idaho physician license lookup.
Step 4: Match the record—not just the number
Compare the returned name, state, license type, and full license number. Confirm that the number belongs to the physician you intended to search. A match in the wrong state or under a different profession may refer to someone else.
Step 5: Read the status and dates
Once you have the correct record, review the status, expiration date, and any conditions shown. Do not interpret the number itself as evidence that the license is current. A number may remain attached to a historical, expired, inactive, suspended, or revoked record.
Use our separate guide to understand active, inactive, restricted, suspended, and other license statuses.
Step 6: Confirm at the issuing board
Use the official medical boards directory to open the issuing authority's website and repeat the search. The board's record is the final source for official or time-sensitive confirmation.
Common License Number Search Problems
| Problem | Why it happens | What to try |
|---|---|---|
| No result | A prefix, suffix, or leading zero was omitted | Copy the number exactly; then try the format shown by the board |
| Too many results | The number was searched without a state | Add the issuing state and compare license types |
| Wrong physician | Similar number formats exist in different jurisdictions | Match the name, state, profession, and complete number |
| Old status | The independent record has not received a recent update | Check the official board directly |
| Different license types | A person may hold full, training, temporary, or other licenses | Read the license type and dates for each record |
| Name mismatch | A name change, suffix, or data-entry variation exists | Search the board using the number and compare other identifiers |
Some board search forms ignore punctuation; others expect a specific format. If the exact version does not work, try the board's documented example. Test a version without spaces or hyphens only after trying the printed number.
Where Can You Find a Physician's License Number?
A number may appear in several places, but the state board profile is the most dependable public source. Possible locations include:
- The official state licensing portal
- A hospital or clinic physician profile
- Professional documents on which state law or policy requires the number
- A public physician profile or directory
- A prior license verification document
Do not assume that every number displayed near a physician's name is a license number. It may instead be an NPI, DEA registration number, hospital identifier, insurance identifier, or professional membership number.
Medical License Number vs NPI Number
These two numbers serve different purposes.
| Identifier | Issued or maintained by | Main purpose | Does it prove current state licensure? |
|---|---|---|---|
| State medical license number | A state licensing authority | Identifies a state-issued license record | No; check its current status and conditions |
| NPI | The federal NPPES system | Identifies providers in standard healthcare transactions | No |
CMS describes the NPI as a 10-digit identifier used in healthcare administrative and financial transactions. CMS also states that issuance of an NPI does not ensure or validate that a healthcare provider is licensed or credentialed.
If the number has 10 digits, it may be an NPI. Search it in the NPI Registry for identification purposes, then perform a separate license search with the appropriate state board.
For the differences in format, purpose, issuing authority, and verification source, read NPI number vs medical license number.
What the Search Result Can Tell You
A correctly matched license record may help you review:
- The physician's name as recorded by the state
- License number and jurisdiction
- License type or profession
- Current status label
- Issue, renewal, or expiration dates
- Restrictions or final public board actions, when provided
- A link or reference to the official source
It does not automatically confirm specialty, board certification, complete training history, hospital privileges, malpractice history, or the absence of a complaint. Those items use different sources and may not be public in every state.
What If the Number Is Not Found?
Work through this checklist:
- Verify every letter and digit.
- Restore any leading zero.
- Check whether
Oand0, orIand1, were confused. - Add the issuing state.
- Try the board's required punctuation or prefix.
- Search by full name and compare the number in the matching profile.
- Check whether the person is listed under an MD, DO, training, temporary, or another license category.
- Search each state where the physician practices.
- Contact the board if the record is still unclear.
A missing result is not proof that a person is unlicensed. Data may have changed, the input may be formatted differently, or the record may be outside DoctorLicenseLookup's current coverage.
If the number still returns nothing, work through the full guide to why a doctor may not appear in a license lookup.
Frequently Asked Questions
Is a medical license number unique?
It is an identifier within the issuing authority's system. Do not assume that the number alone is nationally unique; always keep the state and license type with it.
Can one doctor have several medical license numbers?
Yes. A physician may have a separate license in every state where authorization is required, plus historical or limited license records.
Does a valid-looking number mean the license is active?
No. You must open the record and review its current status, expiration date, and conditions.
Can a number search show disciplinary history?
It can lead you to the correct profile, which may link to public final actions. What is displayed varies by state. Read original board orders and see our guide to physician disciplinary records.
Is DoctorLicenseLookup an official verification service?
No. It is an independent public-information search tool. Use it to locate and review a record, then confirm important information with the issuing state board.
Search by License Number
Search publicly available physician-license records by name or license number using DoctorLicenseLookup.com. Confirm important or time-sensitive information with the applicable state licensing authority.
