JEFFREY FLUCK ACSW 130763
NPI 1851934673
Social Worker in Upland, CA
NPI Status: Active since October 24, 2019
Contact Information
239 W 9TH ST
UPLAND, CA
ZIP 91786
Phone: (909) 981-6121
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Male
- Social Worker
About JEFFREY FLUCK
This page provides the complete NPI Profile along with additional information for Jeffrey Fluck, a provider established in Upland, California with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1851934673 assigned on October 2019. The practitioner's primary taxonomy code is 104100000X with license number ASW130763 (CA). The provider is registered as an individual and his NPI record was last updated May 2026.
- NPI
- 1851934673
- Provider Name
- JEFFREY FLUCK ACSW 130763
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 239 W 9TH ST UPLAND, CA 91786
- Location Phone
- (909) 981-6121
- Mailing Address
- 239 W 9TH ST UPLAND, CA 91786
- Mailing Phone
- (909) 981-6121
- Is Sole Proprietor?
- No
- Enumeration Date
- 10-24-2019
- Last Update Date
- 05-21-2026
- Code Navigator
A social worker like Jeffrey Fluck 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
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.
- ASW130763
- 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 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 1851934673, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).
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 67 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
UPLAND, CA 91786
UPLAND, CA 91786
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1851934673, enumerated as an "individual" on October 24, 2019.
The provider is located at 239 W 9TH ST UPLAND, CA 91786 and the phone number is (909) 981-6121.
Social Worker with taxonomy code 104100000X.
