CORNERSTONE HOUSING SERVICES LLC
NPI 1750248951
Community/Behavioral Health in Milwaukee, WI

NPI Status: Active since January 08, 2026

Contact Information

342 N WATER ST STE 600
MILWAUKEE, WI
ZIP 53202
Phone: (612) 528-9498

NPI Profile Information
Primary Taxonomy
Authorized Official
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Organization
Community/Behavioral Health

About CORNERSTONE HOUSING SERVICES LLC

This page provides the complete NPI Profile along with additional information for Cornerstone Housing Services Llc, a provider established in Milwaukee, Wisconsin operating as a Community/behavioral Health. The healthcare provider is registered in the NPI registry with number 1750248951 assigned on January 2026. The practitioner's primary taxonomy code is 251S00000X. The provider is registered as an organization and their NPI record was last updated January 2026. The authorized official of this NPI record is Noor Hassan (Owner)

NPI: 1750248951
Provider Name: CORNERSTONE HOUSING SERVICES LLC
Entity Type: Organization
Location Address: 342 N WATER ST STE 600 MILWAUKEE, WI 53202
Location Phone: (612) 528-9498
Mailing Address: 342 N WATER ST STE 600 MILWAUKEE, WI 53202
Mailing Phone: (612) 528-9498
Is Sole Proprietor?: No
Is Organization Subpart?: No
Enumeration Date: 01-08-2026
Last Update Date: 01-08-2026
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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: Community/Behavioral Health
Taxonomy Code: 251S00000X
Type: Agencies
Taxonomy Description: A private or public agency usually under local government jurisdiction, responsible for assuring the delivery of community based mental health, intellectual disabilities, substance abuse and/or behavioral health services to individuals with those disabilities. Services may range from companion care, respite, transportation, community integration, crisis intervention and stabilization, supported employment, day support, prevocational services, residential support, therapeutic and supportive consultation, environmental modifications, intensive in-home therapy and day treatment, in addition to traditional mental health and behavioral treatment.

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: NOOR HASSAN
Authorized Official Title: OWNER
Authorized Official Phone: (612) 528-9498

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 1750248951, we treat the final digit (1) 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 59. The final step is to find the difference between that total and the next multiple of ten (60 - 59 = 1).

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 → 16 → 1 + 6

Pos 8

Unchanged

Pos 9

Doubled → 10 → 1 + 0

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 8 → 16 → 7 5 → 10 → 1

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 + 4 + 1 + 6 + 9 + 1 + 0 + 24 = 59

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

The next multiple of ten after 59 is 60. The difference is the calculated check digit.

60 - 59 = 1

This NPI is valid

The calculated check digit is 1, which matches the last digit of 1750248951.