John Tillett, M.D.
John Tillett, M.D. is an Urology Physician in Denver, CO, registered under NPI 1003090382.
Getting there
Here is what surrounds this office in Denver, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 216 ft away at Harvard Park Parking Garage. The nearest transit stop is 0.23 mi away, served by S Downing St & E Harvard Ave. If you arrive early, there is a coffee shop 0.30 mi away.
Getting here and what is nearby
Parking Harvard Park Patient/Visitor Parking 130 ft ~1 min
Parking Public 202 ft ~1 min
Parking Harvard Park Parking Garage 216 ft ~1 min
Transit E Yale Ave & S Clarkson St 906 ft ~4 min
Transit E Yale Ave & S Clarkson St 958 ft ~4 min
Transit S Downing St & E Harvard Ave 0.23 mi ~5 min
Restaurant Denver Beer Company 0.26 mi ~6 min
2425 South Downing Street, Denver 80210
Mo-Th 11:00-22:00; Fr,Sa 11:00-23:00; Su 11:00-21:00
Coffee lil Coffea 0.27 mi ~6 min
2450 South Downing Street, Denver 80210
Mo-Su 04:00-03:45
Restaurant John Holly's Asian Bistro 0.29 mi ~6 min
2422 South Downing Street, Denver 80210
Mo-Th 11:00-21:30, Fr 11:00-22:30, Sa 11:30-10:30, Su 11:30-21:30
Coffee Green Giraffe Bar 0.30 mi ~6 min
2395 South Downing Street, Denver 80210
Mo 10:30-16:00; We-Su 09:00-16:00; Tu off
Gas station Conoco 0.30 mi ~7 min
2400 South Downing Street, Denver 80210
Mo-Sa 06:00-21:00, Su 08:00-18:00
Restaurant Roaming Buffalo Bar-B-Que 0.30 mi ~7 min
2387 South Downing Street, Denver 80210
Tu-Su 11:00+ "until sold out"
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 |
|---|---|---|
| ME101754 | FL | Urology Physician |
| DR.56872 | CO | Urology Physician primary |
Licences are recorded in 2 states: FL, CO. Providers licensed in several states often practise near a state border or deliver telehealth across state lines.
- Status
- Approved
- Provider type
- Practitioner - Urology
- PAC ID
- 6305034398
- Enrollment ID
- I20160728002028
Medicare enrolment is recorded as approved under the provider type Practitioner - Urology. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
Licensed in 2 states
This provider holds licences in 2 states: Colorado and Florida. The practice address on file is in Denver, CO, but a licence in another state usually means they see patients there too — either at a second location or by telehealth. If the address above is far from you, it is worth calling to ask whether they practise closer to where you live.
Licence numbers are self-reported to NPPES at registration. They do not confirm a licence is currently active, in good standing, or valid for the specialty shown — only the state board can tell you that, which is why we link to each one.
What Urology covers
A urologist manages benign and malignant medical and surgical disorders of the genitourinary system and the adrenal gland. This specialist has comprehensive knowledge of and skills in endoscopic, percutaneous and open surgery of congenital and acquired conditions of the urinary and reproductive systems and their contiguous structures. NUCC Health Care Provider Taxonomy, code 208800000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 208800000X | Urology Physician | ME101754 | FL | |
| 208800000X | Urology Physician | DR.56872 | CO | primary |
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 | 1003090382 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 22, 2007 |
| Last updated | Oct 17, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | M.D. |
| Practice address |
850 E HARVARD AVE STE 305 Denver, CO 80210 (303) 825-8822 Fax (303) 825-4022 |
| Other identifiers |
0028405-00
· Medicaid (FL) 10Y538 · Other (FL) 149XJ · Other (FL) 1976114 · Other (FL) 342733 · Other (FL) 9377632 · Other (FL) P01194994 · Other (FL) P1002313 · Other (FL) |
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 | 0 | 9 | 0 | 3 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 0 | 3 | 7 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
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.