MARK S. VARDELL MA, LPC, LMFT, LCDC
NPI 1407999071
Counselor - Addiction (Substance Use Disorder) in Dallas, TX
NPI Status: Active since February 14, 2007
Contact Information
7557 RAMBLER RD
SUITE 700
DALLAS, TX
ZIP 75231
Phone: (214) 893-9927
Fax: (214) 265-6501
- Individual
- Male
- Counselor
- Addiction (Substance Use Disorder)
About MARK VARDELL
This page provides the complete NPI Profile along with additional information for Mark Vardell, a provider established in Dallas, Texas with a medical specialization in Counselor, focusing in addiction (substance use disorder) . The healthcare provider is registered in the NPI registry with number 1407999071 assigned on February 2007. The practitioner's primary taxonomy code is 101YA0400X with license number 5362 (TX). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1407999071
- Provider Name
- MARK S. VARDELL MA, LPC, LMFT, LCDC
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 7557 RAMBLER RD SUITE 700 DALLAS, TX 75231
- Location Phone
- (214) 893-9927
- Location Fax
- (214) 265-6501
- Mailing Address
- 7557 RAMBLER RD SUITE 700 DALLAS, TX 75231
- Mailing Phone
- (214) 893-9927
- Mailing Fax
- (214) 265-6501
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 02-14-2007
- Last Update Date
- 09-11-2025
- Code Navigator
A Substance Abuse or Addiction Counselor like Mark Vardell advices patients who experience alcoholism, drug addiction, eating disorders, mental health issues, or other mental or behavioral problems. Substance Abuse counselors provide treatment and support to help clients recover from addiction or modify problem behaviors. Many counselors incorporate the principles of 12-step programs, such as Alcoholics Anonymous (AA). They educate clients how to cope with stress and life’s issues in ways that help them recover. Counselors also help patients improve their personal relationships and find ways to discuss their addiction or other problems with family and friends.
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
Counselor Addiction (Substance Use Disorder)
- Taxonomy Code
- 101YA0400X
- Type
- Behavioral Health & Social Service Providers
- License No.
- 5362
- License State
- TX
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 | 101YP2500X | Behavioral Health & Social Service Providers | Counselor | 8819 (TX) |
| 2 | 106H00000X | Behavioral Health & Social Service Providers | Marriage & Family Therapist | 002140 (TX) |
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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 1407999071, we treat the final digit (1) 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 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).
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 69 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
DALLAS, TX 75231
DALLAS, TX 75231
DALLAS, TX 75231
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1407999071, enumerated as an "individual" on February 14, 2007.
The provider is located at 7557 RAMBLER RD SUITE 700 DALLAS, TX 75231 and the phone number is (214) 893-9927.
Counselor with taxonomy code 101YA0400X and a focus in Addiction (Substance Use Disorder).
