Gregg Royer, PA-C
Gregg Royer, PA-C is a Medical Physician Assistant in Centennial, CO, registered under NPI 1164566964.
Getting there
The practice address on file is 5555 E ARAPAHOE RD, Centennial, CO 80122. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 528 | CO | Medical Physician Assistant primary |
This provider holds licence 528 issued in CO. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Medical covers
Definition to come... NUCC Health Care Provider Taxonomy, code 363AM0700X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1164566964 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 16, 2007 |
| Last updated | Apr 28, 2021 |
| Status | Active |
| Sole proprietor | No |
| Credential | PA-C |
| Practice address |
5555 E ARAPAHOE RD Centennial, CO 80122 (303) 338-4545 |
| Mailing address |
10350 E DAKOTA AVE Denver, CO 80247 |
| Other identifiers |
006457
· KAISER-COMMERCIAL NUMBER 97207730 (CO) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 6 | 4 | 5 | 6 | 6 | 9 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 3 | 4 | 1 | 6 | 3 | 9 | 3 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.