CRYSTAL LADONNA GRIDIRON
NPI 1447990825
Social Worker in Fresno, CA
NPI Status: Active since March 31, 2022
Contact Information
3636 N 1ST ST STE 112
FRESNO, CA
ZIP 93726
Phone: (855) 343-1057
NPPES record last updated: December 15, 2025. Verified against the NPPES registry weekly; last sync: July 12, 2026.
Record update history: Dec 15, 2025, Dec 8, 2025, Sep 12, 2024 and 1 more (4 updates tracked since 2023).
- Individual
- Female
- Social Worker
About CRYSTAL GRIDIRON
This page provides the complete NPI Profile along with additional information for Crystal Gridiron, a provider established in Fresno, California with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1447990825 assigned on March 2022. The practitioner's primary taxonomy code is 104100000X with license number 100186 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1447990825
- Provider Name
- CRYSTAL LADONNA GRIDIRON
- Other Name Type
- Other Name (5)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 3636 N 1ST ST STE 112 FRESNO, CA 93726
- Location Phone
- (855) 343-1057
- Mailing Address
- 3636 N 1ST ST STE 112 FRESNO, CA 93726
- Mailing Phone
- (855) 343-1057
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-31-2022
- Last Update Date
- 12-15-2025
- Code Navigator
A social worker like Crystal Gridiron helps patients solve and cope with problems in their everyday lives, diagnoses and treats mental, behavioral, and emotional problems. Social workers help in wide range of situations, such as adopting a child, illness, divorce, or unemployment.
Location Map
Secondary Locations
- 3636 N First Street Ste 135,154,162
FRESNO, CA 93726
(559) 476-2166 - 1680 W Shaw Ave Ste 201
Fresno, CA 93711
(855) 343-1057 - 3400 MCCALL Ave Ste 104
SELMA, CA 93662
(855) 343-1057 - 3467 W Shaw Ave Ste 101
Fresno, CA 93711
(559) 271-3096 - 380 & 386 COALINGA PLAZA
COALINGA, CA 93210
(855) 343-1057 - 2731 W Olive Ave
Fresno, CA 93728
(559) 233-5096 - 1311 11TH ST
REEDLEY, CA 93654
(855) 343-1057 - 275 S MADERA AVE STE 404
KERMAN, CA 93630
(855) 343-1057 - 3855 N WEST AVE STE 105,108 &110
FRESNO, CA 93705
(559) 334-6433 - 225 ACADEMY AVE
SANGER, CA 93657
(855) 343-1057
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Social Worker
- Taxonomy Code
- 104100000X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 100186
- License State
- CA
- Taxonomy Description
- A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
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NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1447990825, we treat the final digit (5) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 5).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 75 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 3 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1447990825, enumerated as an "individual" on March 31, 2022.
The provider is located at 3636 N 1ST ST STE 112 FRESNO, CA 93726 and the phone number is (855) 343-1057.
Social Worker with taxonomy code 104100000X.
