Geoffrey Trenkle, D.O.
Geoffrey Trenkle, D.O. is a Facial Plastic Surgery Physician in Los Angeles, CA, registered under NPI 1003044876. 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 Los Angeles, based on OpenStreetMap data collected Sep 1, 2026. Parking is available about 471 ft away. The nearest transit stop is 658 ft away, served by Cesar E Chavez & State.
Getting here and what is nearby
Transit Cesar E Chavez & Boyle 41 ft ~1 min
Transit Cesar E Chavez & Boyle 99 ft ~1 min
Parking 315 ft ~2 min
Parking 429 ft ~2 min
Parking 471 ft ~2 min
Restaurant Subway 607 ft ~3 min
1821 East Cesar Chavez Avenue, Los Angeles 90033
Mo-Sa 07:00-23:00; Su 09:00-21:00
Transit Cesar E Chavez & State 658 ft ~3 min
Restaurant Santa Cecilia Restaurant 0.26 mi ~6 min
Restaurant El Pollo Loco 0.32 mi ~7 min
2000 Cesar E Chavez Avenue, Los Angeles 90033
Mo-Su 10:00-21:00
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 |
|---|---|---|
| 20A13166 | CA | Facial Plastic Surgery Physician primary |
This provider holds licence 20A13166 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Otolaryngology
- PAC ID
- 5698923944
- Enrollment ID
- I20150302001646
Medicare enrolment is recorded as approved under the provider type Practitioner - Otolaryngology. 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.
What Facial Plastic Surgery covers
An otolaryngologist who specializes in facial plastic surgery. NUCC Health Care Provider Taxonomy, code 207YS0123X
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 | 1003044876 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 30, 2009 |
| Last updated | Oct 18, 2019 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Credential | D.O. |
| Practice address |
1700 E CESAR E CHAVEZ AVE STE 2500 Los Angeles, CA 90033 (323) 268-6731 Fax (323) 268-6738 |
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 | 4 | 4 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 4 | 8 | 8 | 5 |
Sum = 54 · next multiple of 10 = 60 · check digit = 6 · actual last digit = 6
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.