LANDON FERN MARRIOTT
NPI 1104348200
Social Worker in Berkeley, CA
NPI Status: Active since July 10, 2017
Contact Information
1255 ALLSTON WAY
BERKELEY, CA
ZIP 94702
Phone: (510) 845-9010
- Individual
- Male
- Social Worker
About LANDON MARRIOTT
This page provides the complete NPI Profile along with additional information for Landon Marriott, a provider established in Berkeley, California with a medical specialization in Social Worker. The healthcare provider is registered in the NPI registry with number 1104348200 assigned on July 2017. The practitioner's primary taxonomy code is 104100000X. The provider is registered as an individual and his NPI record was last updated February 2026.
- NPI
- 1104348200
- Provider Name
- LANDON FERN MARRIOTT
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 1255 ALLSTON WAY BERKELEY, CA 94702
- Location Phone
- (510) 845-9010
- Mailing Address
- 515 3RD AVE SEATTLE, WA 98104
- Mailing Phone
- (510) 320-7195
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-10-2017
- Last Update Date
- 02-16-2026
- Code Navigator
A social worker like Landon Marriott 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
Secondary Locations
- 515 3rd Ave
Seattle, WA 98104
(510) 320-7195
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
- License State
- WA
- 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.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program |
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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 1104348200, 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 50. The final step is to find the difference between that total and the next multiple of ten (50 - 50 = 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 50 is 50. The difference is the calculated check digit.
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The following 20 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1104348200, enumerated as an "individual" on July 10, 2017.
The provider is located at 1255 ALLSTON WAY BERKELEY, CA 94702 and the phone number is (510) 845-9010.
Social Worker with taxonomy code 104100000X.
