MS. DANA PEARL FELDSTEIN
NPI 1396674354
Social Worker in Grayslake, IL
NPI Status: Active since May 15, 2026
Contact Information
34121 N US HIGHWAY 45
GRAYSLAKE, IL
ZIP 60030
Phone: (224) 880-0177
Fax: (224) 880-0172
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Female
- Social Worker
About DANA FELDSTEIN
This page provides the complete NPI Profile along with additional information for Dana Feldstein, a provider established in Grayslake, Illinois with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1396674354 assigned on May 2026. The practitioner's primary taxonomy code is 104100000X. The provider is registered as an individual and her NPI record was last updated May 2026.
- NPI
- 1396674354
- Provider Name
- MS. DANA PEARL FELDSTEIN
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 34121 N US HIGHWAY 45 GRAYSLAKE, IL 60030
- Location Phone
- (224) 880-0177
- Location Fax
- (224) 880-0172
- Mailing Address
- 2195 AVALON DR BUFFALO GROVE, IL 60089
- Mailing Phone
- (224) 880-0177
- Mailing Fax
- (224) 880-0172
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-15-2026
- Last Update Date
- 05-18-2026
- Code Navigator
A social worker like Dana Feldstein helps patients solve and cope with problems in their everyday lives, diagnoses and treats mental, behavioral, and emotional problems. Social workers help in wide range of situations, such as adopting a child, illness, divorce, or unemployment.
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
Social Worker
- Taxonomy Code
- 104100000X
- Type
- Behavioral Health & Social Service Providers
- Taxonomy Description
- A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
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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 1396674354, we treat the final digit (4) 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 66. The final step is to find the difference between that total and the next multiple of ten (70 - 66 = 4).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 66 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 11 providers are registered at the same or a nearby location.
GRAYSLAKE, IL 60030
GRAYSLAKE, IL 60030
GRAYSLAKE, IL 60030
GRAYSLAKE, IL 60030
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1396674354, enumerated as an "individual" on May 15, 2026.
The provider is located at 34121 N US HIGHWAY 45 GRAYSLAKE, IL 60030 and the phone number is (224) 880-0177.
Social Worker with taxonomy code 104100000X.
