MR. THEODORE WALTER SIOK
NPI 1558212720
Peer Specialist in Santa Monica, CA
NPI Status: Active since February 04, 2026
Contact Information
1422 6TH ST APT 305
SANTA MONICA, CA
ZIP 90401
Phone: (310) 913-8929
- Individual
- Male
- Peer Specialist
About THEODORE SIOK
This page provides the complete NPI Profile along with additional information for Theodore Siok, a provider established in Santa Monica, California with a medical specialization in Peer Specialist. The healthcare provider is registered in the NPI registry with number 1558212720 assigned on February 2026. The practitioner's primary taxonomy code is 175T00000X with license number MPSS-CJMEFU (CA). The provider is registered as an individual and his NPI record was last updated February 2026.
- NPI
- 1558212720
- Provider Name
- MR. THEODORE WALTER SIOK
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1422 6TH ST APT 305 SANTA MONICA, CA 90401
- Location Phone
- (310) 913-8929
- Mailing Address
- 1422 6TH ST APT 305 SANTA MONICA, CA 90401
- Mailing Phone
- (310) 913-8929
- Is Sole Proprietor?
- No
- Enumeration Date
- 02-04-2026
- Last Update Date
- 02-04-2026
- 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
Peer Specialist
- Taxonomy Code
- 175T00000X
- Type
- Other Service Providers
- License No.
- MPSS-CJMEFU
- License State
- CA
- Taxonomy Description
- Individuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans Affairs or a state mental health department/certification/licensing authority.
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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 1558212720, 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.
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 60 is 60. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1558212720, enumerated as an "individual" on February 04, 2026.
The provider is located at 1422 6TH ST APT 305 SANTA MONICA, CA 90401 and the phone number is (310) 913-8929.
Peer Specialist with taxonomy code 175T00000X.
