Clifford Merkel, MD
Clifford Merkel, MD is an Orthopaedic Foot and Ankle Surgery Physician in Redlandss, CA, registered under NPI 1184710642.
Getting there
The practice address on file is 1901 WEST LUGONIA AVENUE SUITE 120, Redlandss, CA 92374. 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 |
|---|---|---|
| G46740 | CA | Orthopaedic Foot and Ankle Surgery… primary |
This provider holds licence G46740 issued in CA. 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 Foot and Ankle Surgery covers
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, foot and ankle surgeons deal with adult reconstructive foot and ankle surgery, adult foot and ankle trauma, sports medicine foot and ankle, and children's foot and ankle reconstructive surgery. NUCC Health Care Provider Taxonomy, code 207XX0004X
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 | 1184710642 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 4, 2006 |
| Last updated | Jul 13, 2007 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
1901 WEST LUGONIA AVENUE SUITE 120 Redlandss, CA 92374 (909) 557-1600 Fax (909) 557-1740 |
| Mailing address |
PO BOX 8520 Redlands, CA 92375 |
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 | 8 | 4 | 7 | 1 | 0 | 6 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 7 | 4 | 5 | 1 | 0 | 6 | 8 |
Sum = 58 · next multiple of 10 = 60 · 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.