MR. CHRISTOPHER JOHN GILLIS OTR
NPI 1134399900
Occupational Therapist - Neurorehabilitation in San Antonio, TX
NPI Status: Active since March 07, 2008
Contact Information
4241 WOODCOCK DR
A100
SAN ANTONIO, TX
ZIP 78228
Phone: (210) 785-5200
NPPES record last updated: April 2, 2008. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Individual
- Male
- Occupational Therapist
- Neurorehabilitation
About CHRISTOPHER GILLIS
This page provides the complete NPI Profile along with additional information for Christopher Gillis, a provider established in San Antonio, Texas with a medical specialization in Occupational Therapist, focusing in neurorehabilitation . The healthcare provider is registered in the NPI registry with number 1134399900 assigned on March 2008. The practitioner's primary taxonomy code is 225XN1300X with license number 107391 (TX). The provider is registered as an individual and his NPI record was last updated 18 years ago.
- NPI
- 1134399900
- Provider Name
- MR. CHRISTOPHER JOHN GILLIS OTR
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4241 WOODCOCK DR A100 SAN ANTONIO, TX 78228
- Location Phone
- (210) 785-5200
- Mailing Address
- 306 W GRAMERCY PL SAN ANTONIO, TX 78212
- Mailing Phone
- (210) 736-2455
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 03-07-2008
- Last Update Date
- 04-02-2008
- Code Navigator
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
Occupational Therapist Neurorehabilitation
- Taxonomy Code
- 225XN1300X
- Type
- Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- License No.
- 107391
- License State
- TX
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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 1134399900, 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 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 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.
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 70 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 9 providers are registered at the same or a nearby location.
SAN ANTONIO, TX 78228
SAN ANTONIO, TX 78228
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1134399900, enumerated as an "individual" on March 07, 2008.
The provider is located at 4241 WOODCOCK DR A100 SAN ANTONIO, TX 78228 and the phone number is (210) 785-5200.
Occupational Therapist with taxonomy code 225XN1300X and a focus in Neurorehabilitation.
