MARKS HOUSE, LLC
NPI 1598298515
Psychiatric Residential Treatment Facility in Agoura Hills, CA
NPI Status: Active since April 06, 2017
Contact Information
3821 MARKS RD
AGOURA HILLS, CA
ZIP 91301
Phone: (323) 880-2110
Fax: (310) 919-0372
NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: July 12, 2026.
- Organization
- Psychiatric Residential Treatment Facili...
- CLIA Number: 05D2138585
- CLIA Cert. Type: Other - MENTAL HEALTH RESIDENTIAL
- CLIA Exp. Date: 10-19-2025
About MARKS HOUSE, LLC
This page provides the complete NPI Profile along with additional information for Marks House, Llc, a provider established in Agoura Hills, California operating as a Psychiatric Residential Treatment Facility. The healthcare provider is registered in the NPI registry with number 1598298515 assigned on April 2017. The practitioner's primary taxonomy code is 323P00000X. The provider is registered as an organization and their NPI record was last updated one year ago. The authorized official of this NPI record is Mr. Terry Schoser (Revenue Cycle Manager)
- NPI
- 1598298515
- Provider Name
- MARKS HOUSE, LLC
- Entity Type
- Organization
- Location Address
- 3821 MARKS RD AGOURA HILLS, CA 91301
- Location Phone
- (323) 880-2110
- Location Fax
- (310) 919-0372
- Mailing Address
- 6053 BRISTOL PKWY CULVER CITY, CA 90230
- Mailing Phone
- (323) 364-6489
- Mailing Fax
- (310) 919-0372
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 04-06-2017
- Last Update Date
- 01-14-2026
- 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
Psychiatric Residential Treatment Facility
- Taxonomy Code
- 323P00000X
- Type
- Residential Treatment Facilities
- Taxonomy Description
- A residential treatment facility (RTF) is a facility or distinct part of a facility that provides to children and adolescents, a total, twenty-four hour, therapeutically planned group living and learning situation where distinct and individualized psychotherapeutic interventions can take place. Residential treatment is a specific level of care to be differentiated from acute, intermediate, and long-term hospital care, when the least restrictive environment is maintained to allow for normalization of the patient's surroundings. The RTF must be both physically and programmatically distinct if it is a part or subunit of a larger treatment program. An RTF is organized and professionally staffed to provide residential treatment of mental disorders to children and adolescents who have sufficient intellectual potential to respond to active treatment (that is, for whom it can reasonably be assumed that treatment of the mental disorder will result in an improved ability to function outside the RTF) for whom outpatient treatment, partial hospitalization or protected and structured environment is medically or psychologically necessary
CLIA Information
The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:
- CLIA Number
- 05D2138585
- Facility Type
- Other - MENTAL HEALTH RESIDENTIAL
- Certificate Effective Date
- October 20, 2023
- Certificate Expiration Date
- October 19, 2025
- Laboratory Director
- LOUIE MICHAEL
- Certificate Type
- Certificate of Waiver
- Certificate Type Description
- This CLIA certificate is issued to Marks House, Llc to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.
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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 1598298515, we treat the final digit (5) 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 75. The final step is to find the difference between that total and the next multiple of ten (80 - 75 = 5).
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 75 is 80. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1598298515, enumerated as an "organization" on April 06, 2017.
The provider is located at 3821 MARKS RD AGOURA HILLS, CA 91301 and the phone number is (323) 880-2110.
Psychiatric Residential Treatment Facility with taxonomy code 323P00000X.
