MARQUEZ DIAZ & ASSOCIATES
MARQUEZ DIAZ & ASSOCIATES is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1710707047, based in Bristow, VA. The organization lists 14 taxonomy classifications, with Professional Counselor recorded as primary.
Getting there
The practice address on file is 8955 BENCHMARK LN, Bristow, VA 20136. 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
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 Professional covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YP2500X
All registered taxonomy codes
This provider registers 14 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 101YP2500X | Professional Counselor Professional | — | — | primary |
| 101YA0400X | Addiction (Substance Use Disorder) Counselor Addiction (Substance Use Disorder) | — | — | |
| 102L00000X | Psychoanalyst | — | — | |
| 103G00000X | Clinical Neuropsychologist | — | — | |
| 103K00000X | Behavior Analyst | — | — | |
| 103T00000X | Psychologist | — | — | |
| 103TA0700X | Adult Development & Aging Psychologist Adult Development & Aging | — | — | |
| 103TC0700X | Clinical Psychologist Clinical | — | — | |
| 103TC2200X | Clinical Child & Adolescent Psychologist Clinical Child & Adolescent | — | — | |
| 103TF0000X | Family Psychologist Family | — | — | |
| 103TF0200X | Forensic Psychologist Forensic | — | — | |
| 103TH0004X | Health Psychologist Health | — | — | |
| 103TP2701X | Group Psychotherapy Psychologist Group Psychotherapy | — | — | |
| 103TS0200X | School Psychologist School | — | — |
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 | 1710707047 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Oct 11, 2024 |
| Last updated | Oct 11, 2024 |
| Status | Active |
| Practice address |
8955 BENCHMARK LN Bristow, VA 20136 (703) 869-0058 Fax (703) 397-8220 |
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 | 7 | 1 | 0 | 7 | 0 | 7 | 0 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 7 | 2 | 0 | 5 | 0 | 5 | 0 | 8 |
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.