MR. ALEXANDER JACOB HARTIN MS
NPI 1134069917
Counselor - Mental Health in Milwaukee, WI

NPI Status: Active since March 31, 2026

Contact Information

2266 N PROSPECT AVE
MILWAUKEE, WI
ZIP 53202
Phone: (414) 405-0670

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  • Individual
  • Male
  • Counselor
  • Mental Health

About ALEXANDER HARTIN

This page provides the complete NPI Profile along with additional information for Alexander Hartin, a provider established in Milwaukee, Wisconsin with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1134069917 assigned on March 2026. The practitioner's primary taxonomy code is 101YM0800X with license number 8730226 (WI). The provider is registered as an individual and his NPI record was last updated March 2026.

NPI
1134069917
Provider Name
MR. ALEXANDER JACOB HARTIN MS
Gender
Male
Entity Type
Individual
Location Address
2266 N PROSPECT AVE MILWAUKEE, WI 53202
Location Phone
(414) 405-0670
Mailing Address
321 N 70TH ST WAUWATOSA, WI 53213
Mailing Phone
(262) 490-2375
Is Sole Proprietor?
Yes
Enumeration Date
03-31-2026
Last Update Date
03-31-2026
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A mental health counselor like Alexander Hartin 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

Secondary Locations

  • 321 N 70th St
    Wauwatosa, WI 53213
    (262) 490-2375

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.
8730226
License State
WI

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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 1134069917, we treat the final digit (7) 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 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

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
1
Unchanged
Pos 3
3
Doubled → 6
Pos 4
4
Unchanged
Pos 5
0
Doubled → 0
Pos 6
6
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
9
Unchanged
Pos 9
1
Doubled → 2
Check
7
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 3 → 6 0 → 0 9 → 18 → 9 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 6 + 4 + 0 + 6 + 1 + 8 + 9 + 2 + 24 = 63

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

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1134069917.

Other Providers at the Same Location


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

Surgery
2266 N PROSPECT AVE, SUITE 518
MILWAUKEE, WI 53202
Dentist
2266 N PROSPECT AVE, STE 504
MILWAUKEE, WI 53202
Social Worker (Clinical)
2266 N PROSPECT AVE, SUITE 608
MILWAUKEE, WI 53202
Counselor (Professional)
2266 N PROSPECT AVE, SUITE 608
MILWAUKEE, WI 53202
Psychologist (Clinical)
2266 N PROSPECT AVE, SUITE 510
MILWAUKEE, WI 53202
Social Worker
2266 N PROSPECT AVE, STE 616
MILWAUKEE, WI 53202
Psychologist
2266 N PROSPECT AVE, 605
MILWAUKEE, WI 53202
Counselor (Professional)
2266 N PROSPECT AVE
MILWAUKEE, WI 53202
Psychologist (Counseling)
2266 N PROSPECT AVE, SUITE #605
MILWAUKEE, WI 53202
Nurse Practitioner (Adult Health)
2266 N PROSPECT AVE, SUITE 304
MILWAUKEE, WI 53202
Counselor (Addiction (Substance Use Disorder))
2266 N PROSPECT AVE, SUITE 326
MILWAUKEE, WI 53202
Case Management
2266 N PROSPECT AVE, SUITE 514
MILWAUKEE, WI 53202
Non-emergency Medical Transport (VAN)
2266 N PROSPECT AVE
MILWAUKEE, WI 53202
Clinic/Center (Mental Health (Including Community Mental Health Center))
2266 N PROSPECT AVE, SUITE 608
MILWAUKEE, WI 53202
Nurse Practitioner
2266 N PROSPECT AVE, SUITE 304
MILWAUKEE, WI 53202
Surgery
2266 N PROSPECT AVE, #518
MILWAUKEE, WI 53202
Health and Wellness Coach
2266 N PROSPECT AVE
MILWAUKEE, WI 53202
Skilled Nursing Facility
2266 N PROSPECT AVE, SUITE #503
MILWAUKEE, WI 53202
Counselor (Mental Health)
2266 N PROSPECT AVE
MILWAUKEE, WI 53202
Social Worker
2266 N PROSPECT AVE
MILWAUKEE, WI 53202

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1134069917, enumerated as an "individual" on March 31, 2026.

The provider is located at 2266 N PROSPECT AVE MILWAUKEE, WI 53202 and the phone number is (414) 405-0670.

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