DR. MARIA E O'BRIEN OTD, OTR/L
NPI 1114809878
Occupational Therapist in Chicago, IL

NPI Status: Active since July 23, 2025

Contact Information

3319 N ELSTON AVE
CHICAGO, IL
ZIP 60618
Phone: (312) 733-0883

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  • Individual
  • Female
  • Occupational Therapist

About MARIA O'BRIEN

This page provides the complete NPI Profile along with additional information for Maria O'brien, a provider established in Chicago, Illinois with a medical specialization in Occupational Therapist. The healthcare provider is registered in the NPI registry with number 1114809878 assigned on July 2025. The practitioner's primary taxonomy code is 225X00000X with license number 056.016652 (IL). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1114809878
Provider Name
DR. MARIA E O'BRIEN OTD, OTR/L
Gender
Female
Entity Type
Individual
Location Address
3319 N ELSTON AVE CHICAGO, IL 60618
Location Phone
(312) 733-0883
Mailing Address
3319 N ELSTON AVE CHICAGO, IL 60618
Is Sole Proprietor?
No
Enumeration Date
07-23-2025
Last Update Date
08-01-2025
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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

Occupational Therapist

Taxonomy Code
225X00000X
Type
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
License No.
056.016652
License State
IL
Taxonomy Description
An occupational therapist is a person who has graduated from an entry-level occupational therapy program accredited by the Accreditation Council for Occupational Therapy Education (ACOTE) or predecessor organizations, or approved by the World Federation of Occupational Therapists (WFOT), or an equivalent international occupational therapy education program; has successfully completed a period of supervised fieldwork experience required by the occupational therapy program; has passed a nationally recognized entry-level examination for occupational therapists, and fulfills state requirements for licensure, certification, or registration. An occupational therapist provides interventions based on evaluation and which emphasize the therapeutic use of everyday life activities (i.e., occupations) with individuals or groups for the purpose of facilitating participation in roles and situations and in home, school, workplace, community and other settings. Occupational therapy services are provided for the purpose of promoting health and wellness and are provided to those who have or are at risk for developing an illness, injury, disease, disorder, condition, impairment, disability, activity limitation, or participation restriction. Occupational therapists address the physical, cognitive, psychosocial, sensory, and other aspects of occupational performance in a variety of contexts to support engagement in everyday life activities that affect health, well-being, and quality of life.

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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 1114809878, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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
1
Doubled → 2
Pos 4
4
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
0
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
8
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
8
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 9 → 18 → 9 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 2 + 4 + 1 + 6 + 0 + 1 + 8 + 8 + 1 + 4 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1114809878.

Other Providers at the Same Location


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

Podiatrist
3319 N ELSTON AVE, SUITE # 200
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Podiatrist (Primary Podiatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Nurse Practitioner (Family)
3319 N ELSTON AVE, SUITE #100
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Podiatrist (Primary Podiatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 200
CHICAGO, IL 60618
Family Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Podiatrist
3319 N ELSTON AVE, SUITE #100
CHICAGO, IL 60618
Internal Medicine (Geriatric Medicine)
3319 N ELSTON AVE, SUITE 100
CHICAGO, IL 60618
Behavior Technician
3319 N ELSTON AVE
CHICAGO, IL 60618
Behavior Technician
3319 N ELSTON AVE
CHICAGO, IL 60618
Behavior Technician
3319 N ELSTON AVE
CHICAGO, IL 60618
Occupational Therapist
3319 N ELSTON AVE
CHICAGO, IL 60618
Behavior Technician
3319 N ELSTON AVE
CHICAGO, IL 60618
Behavior Technician
3319 N ELSTON AVE
CHICAGO, IL 60618
Speech-Language Pathologist
3319 N ELSTON AVE
CHICAGO, IL 60618
Occupational Therapist (Pediatrics)
3319 N ELSTON AVE
CHICAGO, IL 60618

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1114809878, enumerated as an "individual" on July 23, 2025.

The provider is located at 3319 N ELSTON AVE CHICAGO, IL 60618 and the phone number is (312) 733-0883.

Occupational Therapist with taxonomy code 225X00000X.