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

NICOLE ALLEGRETTO
NPI 1679423693
Counselor - Mental Health in Monrovia, CA

Active since January 29, 2026
1333 S MAYFLOWER AVE, SUITE 220, MONROVIA, CA 91016(818) 241-6780(888) 588-2752 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 29, 2026 (2 updates tracked since 2026).

  • Individual
  • Female
  • Counselor
  • Mental Health

About NICOLE ALLEGRETTO

This page provides the complete NPI Profile along with additional information for Nicole Allegretto, a provider established in Monrovia, California with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1679423693 assigned on January 2026. The practitioner's primary taxonomy code is 101YM0800X with license number A22755 (NC). The provider is registered as an individual and her NPI record was last updated July 2026.

NPI
1679423693
Provider Name
NICOLE ALLEGRETTO
Gender
Female
Entity Type
Individual
Location Address
1333 S MAYFLOWER AVE SUITE 220 MONROVIA, CA 91016
Location Phone
(818) 241-6780
Location Fax
(888) 588-2752
Mailing Address
1333 S MAYFLOWER AVE SUITE 220 MONROVIA, CA 91016
Mailing Phone
(818) 241-6780
Mailing Fax
(888) 588-2752
Is Sole Proprietor?
No
Enumeration Date
01-29-2026
Last Update Date
07-14-2026
Code Navigator

A mental health counselor like Nicole Allegretto provides treatment to individuals, families, couples, and groups for mental and emotional health issues and relationship problems. Mental health counselors treat clients with a variety of conditions, including anxiety, depression, grief, low self-esteem, stress, and suicidal impulses.

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

Counselor Mental Health

Taxonomy Code
101YM0800X
Type
Behavioral Health & Social Service Providers
License No.
A22755
License State
NC

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)
1101Y00000XBehavioral Health & Social Service Providers

Counselor

A22755 (NC)
2101YP2500XBehavioral Health & Social Service Providers

Counselor
Professional

A22755 (NC)
3106S00000XBehavioral Health & Social Service Providers

Behavior Technician

 

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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 1679423693, 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 77. The final step is to find the difference between that total and the next multiple of ten (80 - 77 = 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
6
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
9
Unchanged
Pos 5
4
Doubled → 8
Pos 6
2
Unchanged
Pos 7
3
Doubled → 6
Pos 8
6
Unchanged
Pos 9
9
Doubled → 18 → 1 + 8
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 7 → 14 → 5 4 → 8 3 → 6 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 1 + 4 + 9 + 8 + 2 + 6 + 6 + 1 + 8 + 24 = 77

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

The next multiple of ten after 77 is 80. The difference is the calculated check digit.

80 - 77 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1679423693.

Other Providers at the Same Location


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

Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016
Behavior Technician
1333 S MAYFLOWER AVE
MONROVIA, CA 91016

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1679423693, enumerated as an "individual" on January 29, 2026.

The provider is located at 1333 S MAYFLOWER AVE SUITE 220 MONROVIA, CA 91016 and the phone number is (818) 241-6780.

Counselor with taxonomy code 101YM0800X and a focus in Mental Health.