MR. WILLIAM CHRISTOPER HANCOCK JR. LVN
NPI 1578440236
Licensed Vocational Nurse in Riverside, CA

NPI Status: Active since August 16, 2025

Contact Information

9890 COUNTY FARM RD STE 2
RIVERSIDE, CA
ZIP 92503
Phone: (951) 509-2499

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Licensed Vocational Nurse

About WILLIAM HANCOCK

This page provides the complete NPI Profile along with additional information for William Hancock, a provider established in Riverside, California with a medical specialization in Licensed Vocational Nurse. The healthcare provider is registered in the NPI registry with number 1578440236 assigned on August 2025. The practitioner's primary taxonomy code is 164X00000X with license number 218564 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI: 1578440236
Provider Name: MR. WILLIAM CHRISTOPER HANCOCK JR. LVN
Gender: Male
Entity Type: Individual
Location Address: 9890 COUNTY FARM RD STE 2 RIVERSIDE, CA 92503
Location Phone: (951) 509-2499
Mailing Address: 9890 COUNTY FARM RD STE 2 RIVERSIDE, CA 92503
Mailing Phone: (951) 509-2499
Is Sole Proprietor?: Yes
Enumeration Date: 08-16-2025
Last Update Date: 08-16-2025
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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: Licensed Vocational Nurse
Taxonomy Code: 164X00000X
Type: Nursing Service Providers
License No.: 218564
License State: CA
Taxonomy Description: A licensed vocational nurse with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required for certification as a Registered Nurse. [An alternate term for licensed practical nurse arising from difference in occupational titles between states and post-high school training programs and institutions.] Requirements for education, experience, licensure, and job responsibilities vary among the states.

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 1578440236, we treat the final digit (6) 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 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).

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.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 14 → 1 + 4

Pos 4

Unchanged

Pos 5

Doubled → 8

Pos 6

Unchanged

Pos 7

Doubled → 0

Pos 8

Unchanged

Pos 9

Doubled → 6

Check

Target digit

Regular digit Doubled digit Check digit

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.

1 → 2 7 → 14 → 5 4 → 8 0 → 0 3 → 6

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 5 + 1 + 4 + 8 + 8 + 4 + 0 + 2 + 6 + 24 = 64

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 64 is 70. The difference is the calculated check digit.

70 - 64 = 6

This NPI is valid

The calculated check digit is 6, which matches the last digit of 1578440236.