SAN MARCOS DIALYSIS LLC
SAN MARCOS DIALYSIS LLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1255506036, based in San Marcos, CA. It is classified under End-Stage Renal Disease (ESRD) Treatment Clinic/Center.
Getting there
The practice address on file is 2135 MONTIEL RD BLDG B, San Marcos, CA 92069. 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 |
|---|---|---|
| 550000991 | CA | End-Stage Renal Disease (ESRD) Treatment… primary |
This provider holds licence 550000991 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
- Part A Provider - End-stage Renal Disease Facility (esrd)
- PAC ID
- 6103996822
- Enrollment ID
- O20080605000850
Medicare enrolment is recorded as approved under the provider type Part A Provider - End-stage Renal Disease Facility (esrd). 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 End-Stage Renal Disease (ESRD) Treatment covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QE0700X
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 | 1255506036 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Apr 23, 2008 |
| Last updated | Nov 13, 2025 |
| Status | Active |
| Practice address |
2135 MONTIEL RD BLDG B San Marcos, CA 92069 (760) 975-0170 Fax (760) 975-0177 |
| Mailing address |
5200 VIRGINIA WAY L&C DEPT Brentwood, TN 37027 |
| Other names |
San Marcos Dialysis Center Former Legal Name |
| Other identifiers |
1255506036
· Medicaid (CA) |
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 | 2 | 5 | 5 | 5 | 0 | 6 | 0 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 1 | 5 | 1 | 0 | 3 | 0 | 6 |
Sum = 44 · next multiple of 10 = 50 · 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.