Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

ADDICTION CENTERS OF EXCELLENCE INC.
NPI 1518644608
Clinic/Center - Public Health, State or Local in Modesto, CA

Active since June 29, 2023
1608 TULLY RD, MODESTO, CA 95350(877) 223-7669 Get Directions Write a Review

NPPES record last updated: July 14, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Jul 14, 2026, Jan 10, 2025, Jul 17, 2023 (3 updates tracked since 2023).

  • Organization
  • Clinic/Center
  • Public Health, State or Local

About ADDICTION CENTERS OF EXCELLENCE INC.

This page provides the complete NPI Profile along with additional information for Addiction Centers Of Excellence Inc., a primary care provider established in Modesto, California operating as a Clinic/center, focusing in public health, state or local . The healthcare provider is registered in the NPI registry with number 1518644608 assigned on June 2023. The practitioner's primary taxonomy code is 261QP0905X. The provider is registered as an organization and their NPI record was last updated July 2026. Addiction Centers Of Excellence Inc. operates as a Multi-Specialty Group with one or more individual practitioners, who practice different areas of specialization. The provider's . The authorized official of this NPI record is Kasey Nicole Handwerker (Director)

NPI
1518644608
Provider Legal Name
ADDICTION CENTERS OF EXCELLENCE INC.
Other Organization Name
Other Name Type
(6)
Entity Type
Organization
Location Address
1608 TULLY RD MODESTO, CA 95350
Location Phone
(877) 223-7669
Mailing Address
PO BOX 579702 MODESTO, CA 95357
Mailing Phone
(877) 223-7669
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
06-29-2023
Last Update Date
07-14-2026
Code Navigator

A primary care provider (PCP) like Addiction Centers Of Excellence Inc. sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc .

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

Clinic/Center Public Health, State or Local

Taxonomy Code
261QP0905X
Type
Ambulatory Health Care Facilities

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1104100000XBehavioral Health & Social Service Providers

Social Worker

 
2163W00000XNursing Service Providers

Registered Nurse

 
3207P00000XAllopathic & Osteopathic Physicians

Emergency Medicine

 
4207Q00000XAllopathic & Osteopathic Physicians

Family Medicine

 
5207R00000XAllopathic & Osteopathic Physicians

Internal Medicine

 
6207V00000XAllopathic & Osteopathic Physicians

Obstetrics & Gynecology

 
7208000000XAllopathic & Osteopathic Physicians

Pediatrics

 
82084P0800XAllopathic & Osteopathic Physicians

Psychiatry & Neurology
Psychiatry

 
9208M00000XAllopathic & Osteopathic Physicians

Hospitalist

 
10251K00000XAgencies

Public Health or Welfare

 
11251S00000XAgencies

Community/Behavioral Health

 
12261QM1300XAmbulatory Health Care Facilities

Clinic/Center
Multi-Specialty

 
13261QR1300XAmbulatory Health Care Facilities

Clinic/Center
Rural Health

 
14363L00000XPhysician Assistants & Advanced Practice Nursing Providers

Nurse Practitioner

 

Group Taxonomy 193200000X MULTI-SPECIALTY GROUP

This provider is a business group of one or more individual practitioners, who practice with different areas of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

KASEY NICOLE HANDWERKER

Authorized Official Title
DIRECTOR
Authorized Official Phone
(877) 223-7669

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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 1518644608, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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
5
Unchanged
Pos 3
1
Doubled → 2
Pos 4
8
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
4
Unchanged
Pos 7
4
Doubled → 8
Pos 8
6
Unchanged
Pos 9
0
Doubled → 0
Check
8
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 6 → 12 → 3 4 → 8 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 5 + 2 + 8 + 1 + 2 + 4 + 8 + 6 + 0 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1518644608.

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

Internal Medicine
1608 TULLY RD
MODESTO, CA 95350
Internal Medicine
1608 TULLY RD
MODESTO, CA 95350
Nurse Practitioner (Family)
1608 TULLY RD
MODESTO, CA 95350
Nurse Practitioner (Psychiatric/Mental Health)
1608 TULLY RD
MODESTO, CA 95350
Nurse Practitioner (Psychiatric/Mental Health)
1608 TULLY RD
MODESTO, CA 95350
Nurse Practitioner (Family)
1608 TULLY RD
MODESTO, CA 95350
Nurse Practitioner
1608 TULLY RD
MODESTO, CA 95350

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1518644608, enumerated as an "organization" on June 29, 2023.

The provider is located at 1608 TULLY RD MODESTO, CA 95350 and the phone number is (877) 223-7669.

Clinic/Center with taxonomy code 261QP0905X and a focus in Public Health, State or Local.