TRUE NORTH MENTAL HEALTH
NPI 1619826500
Nurse Practitioner - Psychiatric/Mental Health in Grayslake, IL

NPI Status: Active since January 24, 2026

Contact Information

17707 W DARTMOOR DR
GRAYSLAKE, IL
ZIP 60030
Phone: (401) 602-3938

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  • Organization
  • Nurse Practitioner
  • Psychiatric/Mental Health

About TRUE NORTH MENTAL HEALTH

This page provides the complete NPI Profile along with additional information for True North Mental Health, a provider established in Grayslake, Illinois operating as a Nurse Practitioner, focusing in psychiatric/mental health . The healthcare provider is registered in the NPI registry with number 1619826500 assigned on January 2026. The practitioner's primary taxonomy code is 363LP0808X. The provider is registered as an organization and their NPI record was last updated January 2026. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Tammy Dubose Pmhnp-bc (Owner)

NPI
1619826500
Provider Name
TRUE NORTH MENTAL HEALTH
Entity Type
Organization
Location Address
17707 W DARTMOOR DR GRAYSLAKE, IL 60030
Location Phone
(401) 602-3938
Mailing Address
6615 GRAND AVE GURNEE, IL 60031
Mailing Phone
(847) 584-1529
Mailing Fax
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
01-24-2026
Last Update Date
01-24-2026
Code Navigator

A nurse practitioner (NP) like True North Mental Health is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, 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

Nurse Practitioner Psychiatric/Mental Health

Taxonomy Code
363LP0808X
Type
Physician Assistants & Advanced Practice Nursing Providers

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area 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

TAMMY DUBOSE PMHNP-BC

Authorized Official Title
OWNER
Authorized Official Phone
(401) 602-3938

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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 1619826500, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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
1
Doubled → 2
Pos 4
9
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
2
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
5
Unchanged
Pos 9
0
Doubled → 0
Check
0
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 8 → 16 → 7 6 → 12 → 3 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 2 + 9 + 1 + 6 + 2 + 1 + 2 + 5 + 0 + 24 = 60

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

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1619826500.

Other Providers at the Same Location


The following 1 provider is registered at the same or a nearby location.

Nurse Practitioner (Psychiatric/Mental Health)
17707 W DARTMOOR DR
GRAYSLAKE, IL 60030

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1619826500, enumerated as an "organization" on January 24, 2026.

The provider is located at 17707 W DARTMOOR DR GRAYSLAKE, IL 60030 and the phone number is (401) 602-3938.

Nurse Practitioner with taxonomy code 363LP0808X and a focus in Psychiatric/Mental Health.