Ryan Mangrum, D.M.D.
Ryan Mangrum, D.M.D. is a provider specialising in General Practice Dentistry in Westminster, CO, registered under NPI 1003147521. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Westminster, based on OpenStreetMap data collected Sep 8, 2026. Parking is available about 273 ft away. The nearest transit stop is 0.27 mi away. If you arrive early, there is a coffee shop 864 ft away.
Getting here and what is nearby
Parking 80 ft ~1 min
Restaurant Chaserz 162 ft ~1 min
7980 Sheridan Boulevard, Westminster 80003
Parking 256 ft ~1 min
Parking 273 ft ~2 min
Transit 296 ft ~2 min
Transit 347 ft ~2 min
Restaurant Blazing Bird 487 ft ~2 min
7960 Sheridan Boulevard, Westminster 80003
Restaurant Morning Story 645 ft ~3 min
Mo-Su 07:30-14:00
Coffee Dutch Bros. Coffee 864 ft ~4 min
Gas station King Soopers 974 ft ~4 min
Convenience 7-Eleven 0.21 mi ~5 min
Grocery King Soopers 0.23 mi ~5 min
8055 Sheridan Boulevard, Arvada 80003
Mo-Su 06:00-23:00
Transit 0.27 mi ~6 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 10066 | CO | General Practice Dentistry primary |
This provider holds licence 10066 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 General Practice covers
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs. NUCC Health Care Provider Taxonomy, code 1223G0001X
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 | 1003147521 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 22, 2010 |
| Last updated | Jan 22, 2010 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | D.M.D. |
| Practice address |
7990 SHERIDAN BLVD Westminster, CO 80003 (303) 650-4101 |
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 | 0 | 0 | 3 | 1 | 4 | 7 | 5 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 4 | 5 | 5 | 4 |
Sum = 49 · next multiple of 10 = 50 · check digit = 1 · actual last digit = 1
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.