Bertha Diaz, MFT
Bertha Diaz, MFT is a Marriage & Family Therapist in Martinez, CA, registered under NPI 1003023698.
Getting there
Here is what surrounds this office in Martinez, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 825 ft away. The nearest transit stop is 696 ft away, served by Morello Avenue & Arnold Drive. If you arrive early, there is a coffee shop 0.40 mi away.
Getting here and what is nearby
Transit Arnold Drive & Muir Parkway Offices 179 ft ~1 min
Convenience 7-Eleven 296 ft ~2 min
Parking 374 ft ~2 min
Gas station 7-Eleven 407 ft ~2 min
Parking 406 ft ~2 min
Transit Morello Avenue & Arnold Drive 689 ft ~3 min
Transit Morello Avenue & Arnold Drive 696 ft ~3 min
Restaurant McDonald's 693 ft ~3 min
1185 Arnold Drive, Martinez 94553
Mo-Su 05:00-23:00
Parking 825 ft ~4 min
Restaurant Mountain Mike's 993 ft ~4 min
1160 Arnold Drive, Martinez 94553
Mo-Th 10:00-22:00; Fr-Sa 09:00-00:00; Su 10:00-23:00
Gas station Chevron 0.20 mi ~5 min
Gas station Shell 0.21 mi ~5 min
1175 Muir Road, Martinez 94553
Restaurant Taco Bell 0.24 mi ~5 min
1130 Arnold Drive, Martinez 94553
Mo-Th 08:00-02:00; Fr-Sa 08:00-04:00; Su 08:00-02:00
Grocery Lucky 0.24 mi ~5 min
Coffee Starbucks 0.40 mi ~8 min
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| MFC45501 | CA | Marriage & Family Therapist primary |
This provider holds licence MFC45501 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
- Practitioner - Marriage And Family Therapist
- PAC ID
- 0446697726
- Enrollment ID
- I20240321003592
Medicare enrolment is recorded as approved under the provider type Practitioner - Marriage And Family Therapist. 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 Marriage & Family Therapist covers
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups. NUCC Health Care Provider Taxonomy, code 106H00000X
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 | 1003023698 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 16, 2007 |
| Last updated | Nov 15, 2010 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | MFT |
| Practice address |
1340 ARNOLD DR STE 200 Martinez, CA 94553 (925) 957-5150 |
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 | 2 | 3 | 6 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 2 | 6 | 6 | 9 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.