MS. SHARON SHIELDS
NPI 1265859763
Counselor - Addiction (Substance Use Disorder) in Santa Rosa, CA

NPI Status: Active since March 21, 2014

Contact Information

634 PRESSLEY ST
#14
SANTA ROSA, CA
ZIP 95404
Phone: (707) 484-1326
Fax: (707) 570-3745

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  • Individual
  • Female
  • Counselor
  • Addiction (Substance Use Disorder)

About SHARON SHIELDS

This page provides the complete NPI Profile along with additional information for Sharon Shields, a provider established in Santa Rosa, California with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1265859763 assigned on March 2014. The practitioner's primary taxonomy code is 101YA0400X with license number 133152II (CA). The provider is registered as an individual and her NPI record was last updated December 2025.

NPI
1265859763
Provider Name
MS. SHARON SHIELDS
Gender
Female
Entity Type
Individual
Location Address
634 PRESSLEY ST #14 SANTA ROSA, CA 95404
Location Phone
(707) 484-1326
Location Fax
(707) 570-3745
Mailing Address
634 PRESSLEY ST SANTA ROSA, CA 95404
Mailing Phone
(707) 484-1326
Mailing Fax
(707) 570-3745
Is Sole Proprietor?
Yes
Enumeration Date
03-21-2014
Last Update Date
12-24-2025
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A Substance Abuse or Addiction Counselor like Sharon Shields advices patients who experience alcoholism, drug addiction, eating disorders, mental health issues, or other mental or behavioral problems. Substance Abuse counselors provide treatment and support to help clients recover from addiction or modify problem behaviors. Many counselors incorporate the principles of 12-step programs, such as Alcoholics Anonymous (AA). They educate clients how to cope with stress and life’s issues in ways that help them recover. Counselors also help patients improve their personal relationships and find ways to discuss their addiction or other problems with family and friends.

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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

Counselor Addiction (Substance Use Disorder)

Taxonomy Code
101YA0400X
Type
Behavioral Health & Social Service Providers
License No.
133152II
License State
CA

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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 1265859763, 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.

Pos 1
1
Doubled → 2
Pos 2
2
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
5
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
5
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
7
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
3
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 6 → 12 → 3 8 → 16 → 7 9 → 18 → 9 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 1 + 2 + 5 + 1 + 6 + 5 + 1 + 8 + 7 + 1 + 2 + 24 = 67

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.

70 - 67 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1265859763.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Community Based Residential Treatment Facility, Mental Illness
634 PRESSLEY ST
SANTA ROSA, CA 95404
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634 PRESSLEY ST
SANTA ROSA, CA 95404
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634 PRESSLEY ST
SANTA ROSA, CA 95404
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SANTA ROSA, CA 95404
Counselor (Mental Health)
634 PRESSLEY ST
SANTA ROSA, CA 95404
Community Based Residential Treatment Facility, Mental Illness
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor (Mental Health)
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor (Mental Health)
634 PRESSLEY ST
SANTA ROSA, CA 95404
Case Management
634 PRESSLEY ST
SANTA ROSA, CA 95404
Counselor
634 PRESSLEY ST
SANTA ROSA, CA 95404

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1265859763, enumerated as an "individual" on March 21, 2014.

The provider is located at 634 PRESSLEY ST #14 SANTA ROSA, CA 95404 and the phone number is (707) 484-1326.

Counselor with taxonomy code 101YA0400X and a focus in Addiction (Substance Use Disorder).