MARC CHRISTOPHER WILLIAMS
NPI 1013749886
Case Manager/Care Coordinator in Napa, CA

NPI Status: Active since August 19, 2024

Contact Information

2751 NAPA VALLEY CORPORATE DR BLDG B
NAPA, CA
ZIP 94558
Phone: (707) 227-3900

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

Individual
Male
Case Manager/Care Coordinator

About MARC WILLIAMS

This page provides the complete NPI Profile along with additional information for Marc Williams, a provider established in Napa, California with a medical specialization in Case Manager/care Coordinator. The healthcare provider is registered in the NPI registry with number 1013749886 assigned on August 2024. The practitioner's primary taxonomy code is 171M00000X. The provider is registered as an individual and his NPI record was last updated 2 years ago.

NPI: 1013749886
Provider Name: MARC CHRISTOPHER WILLIAMS
Gender: Male
Entity Type: Individual
Location Address: 2751 NAPA VALLEY CORPORATE DR BLDG B NAPA, CA 94558
Location Phone: (707) 227-3900
Mailing Address: 2751 NAPA VALLEY CORPORATE DR BLDG B NAPA, CA 94558
Mailing Phone: (707) 227-3900
Is Sole Proprietor?: Yes
Enumeration Date: 08-19-2024
Last Update Date: 08-19-2024
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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: Case Manager/Care Coordinator
Taxonomy Code: 171M00000X
Type: Other Service Providers
Taxonomy Description: A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other services. The person has the ability to provide an assessment and review of completed plan of care on a periodic basis. This person is also able to take collaborative action to coordinate the services with other providers and monitor the enrollee's progress toward the cost-effective achievement of objectives specified in the plan of care. Credentials may vary from an experience in the fields of psychology, social work, rehabilitation, nursing or a closely related human service field, to a related Assoc of Arts Degree or to nursing credentials. Some states may require certification in case management.

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 1013749886, 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 → 2

Pos 4

Unchanged

Pos 5

Doubled → 14 → 1 + 4

Pos 6

Unchanged

Pos 7

Doubled → 18 → 1 + 8

Pos 8

Unchanged

Pos 9

Doubled → 16 → 1 + 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 1 → 2 7 → 14 → 5 9 → 18 → 9 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 2 + 3 + 1 + 4 + 4 + 1 + 8 + 8 + 1 + 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 1013749886.