Active NPI
Isaac Diaz, MPH, LDN, CPT, CHES
- Registered Dietitian
- Rancho Cucamonga, CA
National Provider Identifier
1386402188
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Registered Dietitian
- License
- 86265773
- Practice address
- 6929 Valatta PL
Rancho Cucamonga, CA 91701-8656 - Phone
- (909) 710-5794
- NPI assigned
- Mar 7, 2024
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Registered Dietitian | 133V00000X | 86265773 | CA | Primary |
| Nutritionist | 133N00000X |
Addresses
Primary practice location
6929 Valatta PL
Rancho Cucamonga, CA 91701-8656
Mailing address
6929 Valatta PL
Rancho Cucamonga, CA 91701-8656
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Fit4Life Nutrition Inc | Dietitian, Registered | Current | Accepting new patients |
| Fay Nutrition | Dietitian, Registered | Past | Accepting new patients |
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1709769600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1784505600000",
"number": "1386402188",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "6929 VALATTA PL",
"city": "RANCHO CUCAMONGA",
"state": "CA",
"postal_code": "917018656"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "6929 VALATTA PL",
"city": "RANCHO CUCAMONGA",
"state": "CA",
"postal_code": "917018656",
"telephone_number": "909-710-5794"
}
],
"practiceLocations": [],
"basic": {
"last_name": "DIAZ",
"first_name": "ISAAC",
"credential": "MPH, LDN, CPT, CHES",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2024-03-07",
"last_updated": "2026-07-20",
"certification_date": "2026-07-20",
"status": "A"
},
"taxonomies": [
{
"code": "133V00000X",
"taxonomy_group": "",
"desc": "Dietitian, Registered",
"state": "CA",
"license": "86265773",
"primary": true
},
{
"code": "133N00000X",
"taxonomy_group": "",
"desc": "Nutritionist",
"state": null,
"license": null,
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Rancho Cucamonga, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 20, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.