TWIN TOWN CORPORATION
TWIN TOWN CORPORATION is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1871929612, based in Sherman Oaks, CA. It is classified under Substance Use Disorder Rehabilitation Clinic/Center.
Getting there
The practice address on file is 4940 VAN NUYS BLVD STE 201, Sherman Oaks, CA 91403. 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 |
|---|---|---|
| 190290BP | CA | Substance Use Disorder Rehabilitation… primary |
This provider holds licence 190290BP 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 Rehabilitation, Substance Use Disorder covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QR0405X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1871929612 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Sep 25, 2013 |
| Last updated | Nov 14, 2025 |
| Status | Active |
| Practice address |
4940 VAN NUYS BLVD STE 201 Sherman Oaks, CA 91403 (818) 985-0560 Fax (818) 985-7193 |
| Mailing address |
4388 KATELLA AVE. Los Alamitos, CA 90720 |
| Other names |
Twin Town Treatment Center Sherman Oaks Former Legal Name |
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 | 8 | 7 | 1 | 9 | 2 | 9 | 6 | 1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 5 | 1 | 9 | 2 | 9 | 6 | 2 |
Sum = 68 · next multiple of 10 = 70 · 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.