ABBEY HILLMER
NPI 1215812680
Counselor - Mental Health in Madison, WI

NPI Status: Active since August 06, 2025

Contact Information

303 S PATERSON ST STE 1A
MADISON, WI
ZIP 53703
Phone: (608) 571-0558
Fax: (608) 807-5675

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  • Individual
  • Female
  • Counselor
  • Mental Health

About ABBEY HILLMER

This page provides the complete NPI Profile along with additional information for Abbey Hillmer, a provider established in Madison, Wisconsin with a medical specialization in Counselor, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1215812680 assigned on August 2025. The practitioner's primary taxonomy code is 101YM0800X with license number 8190-226 (WI). The provider is registered as an individual and her NPI record was last updated February 2026.

NPI
1215812680
Provider Name
ABBEY HILLMER
Other Name
ABBEY OWENBY
Other Name Type
Former Name (1)
Gender
Female
Entity Type
Individual
Location Address
303 S PATERSON ST STE 1A MADISON, WI 53703
Location Phone
(608) 571-0558
Location Fax
(608) 807-5675
Mailing Address
825 WILLIAMSON ST MADISON, WI 53703
Mailing Fax
(608) 807-5675
Is Sole Proprietor?
No
Enumeration Date
08-06-2025
Last Update Date
02-25-2026
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A mental health counselor like Abbey Hillmer 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.

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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

Counselor Mental Health

Taxonomy Code
101YM0800X
Type
Behavioral Health & Social Service Providers
License No.
8190-226
License State
WI

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

 
2101YP2500XBehavioral Health & Social Service Providers

Counselor
Professional

 

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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 1215812680, 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
2
Unchanged
Pos 3
1
Doubled → 2
Pos 4
5
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
1
Unchanged
Pos 7
2
Doubled → 4
Pos 8
6
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
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 2 → 4 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 2 + 5 + 1 + 6 + 1 + 4 + 6 + 1 + 6 + 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 1215812680.

Other Providers at the Same Location


The following 10 providers are registered at the same or a nearby location.

Counselor (Professional)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Counselor
303 S PATERSON ST STE 1A
MADISON, WI 53703
Social Worker (Clinical)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Psychologist (School)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Counselor (Professional)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Social Worker (Clinical)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Counselor (Mental Health)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Social Worker (Clinical)
303 S PATERSON ST STE 1A
MADISON, WI 53703
Marriage & Family Therapist
303 S PATERSON ST STE 1A
MADISON, WI 53703
Social Worker (Clinical)
303 S PATERSON ST STE 1A
MADISON, WI 53703

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1215812680, enumerated as an "individual" on August 06, 2025.

The provider is located at 303 S PATERSON ST STE 1A MADISON, WI 53703 and the phone number is (608) 571-0558.

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