SEAN MITTELMANN OTR/L
NPI 1821933847
Occupational Therapist in Smithtown, NY

NPI Status: Active since April 23, 2026

Contact Information

1038 W JERICHO TPKE
SMITHTOWN, NY
ZIP 11787
Phone: (631) 368-2583

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  • Individual
  • Male
  • Occupational Therapist

About SEAN MITTELMANN

This page provides the complete NPI Profile along with additional information for Sean Mittelmann, a provider established in Smithtown, New York with a medical specialization in Occupational Therapist. The healthcare provider is registered in the NPI registry with number 1821933847 assigned on April 2026. The practitioner's primary taxonomy code is 225X00000X with license number 031079 (NY). The provider is registered as an individual and his NPI record was last updated April 2026.

NPI
1821933847
Provider Name
SEAN MITTELMANN OTR/L
Gender
Male
Entity Type
Individual
Location Address
1038 W JERICHO TPKE SMITHTOWN, NY 11787
Location Phone
(631) 368-2583
Mailing Address
37 LOTUS LN WESTBURY, NY 11590
Mailing Phone
(516) 313-8480
Is Sole Proprietor?
No
Enumeration Date
04-23-2026
Last Update Date
04-23-2026
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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

Occupational Therapist

Taxonomy Code
225X00000X
Type
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
License No.
031079
License State
NY
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 1821933847, 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 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
8
Unchanged
Pos 3
2
Doubled → 4
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
3
Unchanged
Pos 7
3
Doubled → 6
Pos 8
8
Unchanged
Pos 9
4
Doubled → 8
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 2 → 4 9 → 18 → 9 3 → 6 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 4 + 1 + 1 + 8 + 3 + 6 + 8 + 8 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1821933847.

Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Occupational Therapist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Occupational Therapist (Pediatrics)
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Occupational Therapist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Physical Therapist (Pediatrics)
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Speech-Language Pathologist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Speech-Language Pathologist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Speech-Language Pathologist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Speech-Language Pathologist
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Occupational Therapy Assistant
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Specialist/Technologist (Speech-Language Assistant)
1038 W JERICHO TPKE
SMITHTOWN, NY 11787
Social Worker (School)
1038 W JERICHO TPKE
SMITHTOWN, NY 11787

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1821933847, enumerated as an "individual" on April 23, 2026.

The provider is located at 1038 W JERICHO TPKE SMITHTOWN, NY 11787 and the phone number is (631) 368-2583.

Occupational Therapist with taxonomy code 225X00000X.