TOBIAS HAWTHORNE PMHNP-C
NPI 1750274346
Nurse Practitioner - Psychiatric/Mental Health in New Haven, CT

NPI Status: Active since June 02, 2025

Contact Information

189 ORANGE ST
NEW HAVEN, CT
ZIP 06510
Phone: (203) 937-2309
Fax: (203) 704-9113

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

Individual
Male
Nurse Practitioner
Psychiatric/Mental Health

About TOBIAS HAWTHORNE

This page provides the complete NPI Profile along with additional information for Tobias Hawthorne, a provider established in New Haven, Connecticut with a medical specialization in Nurse Practitioner, focusing in psychiatric/mental health . The healthcare provider is registered in the NPI registry with number 1750274346 assigned on June 2025. The practitioner's primary taxonomy code is 363LP0808X with license number 12.014843 (CT). The provider is registered as an individual and his NPI record was last updated March 2026.

NPI: 1750274346
Provider Name: TOBIAS HAWTHORNE PMHNP-C
Gender: Male
Entity Type: Individual
Location Address: 189 ORANGE ST NEW HAVEN, CT 06510
Location Phone: (203) 937-2309
Location Fax: (203) 704-9113
Mailing Address: 140 THOMPSON ST APT 5E EAST HAVEN, CT 06513
Mailing Phone: (860) 917-6232
Is Sole Proprietor?: Yes
Enumeration Date: 06-02-2025
Last Update Date: 03-30-2026
Code Navigator

A nurse practitioner (NP) like Tobias Hawthorne 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

Secondary Locations

140 Thompson St Apt 5E
East Haven, CT 06513
(860) 917-6232

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
License No.: 12.014843
License State: CT

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 1750274346, 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 → 10 → 1 + 0

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 8

Pos 8

Unchanged

Pos 9

Doubled → 8

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 5 → 10 → 1 2 → 4 4 → 8 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 7 + 1 + 0 + 0 + 4 + 7 + 8 + 3 + 8 + 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 1750274346.