Mark Winkler
Mark Winkler is a Rehabilitation Practitioner in Commerce, CA, registered under NPI 1003087677. 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 Commerce, based on OpenStreetMap data collected Sep 4, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 540 ft away, served by Eastern / Rickenbacker;Eastern Avenue & Rickenbacker Road (Southbound).
Getting here and what is nearby
Transit Eastern / Slauson;Eastern Avenue & Slauson Avenue 411 ft ~2 min
Transit Eastern / Rickenbacker;Eastern Avenue & Rickenbacker Road (Northbound) 515 ft ~2 min
Transit Eastern / Rickenbacker;Eastern Avenue & Rickenbacker Road (Southbound) 540 ft ~3 min
Parking 668 ft ~3 min
Parking 719 ft ~3 min
Parking 0.23 mi ~5 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Rehabilitation Practitioner covers
A health care practitioner who trains or retrains individuals disabled by disease or injury to help them attain their maximum functional capacity. NUCC Health Care Provider Taxonomy, code 225400000X
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 | 1003087677 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 21, 2008 |
| Last updated | Aug 19, 2013 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
5701 S EASTERN AVE 5500 Commerce, CA 90040 (626) 395-7100 |
| Mailing address |
4219 LEIMERT BLVD APT 4 Los Angeles, CA 90008 |
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 | 8 | 7 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 8 | 5 | 6 | 5 |
Sum = 53 · next multiple of 10 = 60 · check digit = 7 · actual last digit = 7
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.