MR. DAVID CLARK CMT
NPI 1386023885
Massage Therapist in San Francisco, CA
NPI Status: Active since May 29, 2015
Contact Information
4200 18TH ST STE 204
SAN FRANCISCO, CA
ZIP 94114
Phone: (415) 948-6464
- Individual
- Male
- Massage Therapist
About DAVID CLARK
This page provides the complete NPI Profile along with additional information for David Clark, a provider established in San Francisco, California with a medical specialization in Massage Therapist. The healthcare provider is registered in the NPI registry with number 1386023885 assigned on May 2015. The practitioner's primary taxonomy code is 225700000X with license number 48330 (CA). The provider is registered as an individual and his NPI record was last updated January 2026.
- NPI
- 1386023885
- Provider Name
- MR. DAVID CLARK CMT
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 4200 18TH ST STE 204 SAN FRANCISCO, CA 94114
- Location Phone
- (415) 948-6464
- Mailing Address
- 4200 18TH ST STE 204 SAN FRANCISCO, CA 94114
- Mailing Phone
- (415) 948-6464
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 05-29-2015
- Last Update Date
- 01-05-2026
- 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
Massage Therapist
- Taxonomy Code
- 225700000X
- Type
- Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- License No.
- 48330
- License State
- CA
- Taxonomy Description
- An individual trained in the manipulation of tissues (as by rubbing, stroking, kneading, or tapping) with the hand or an instrument for remedial or hygienic purposes.
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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 1386023885, 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 65. The final step is to find the difference between that total and the next multiple of ten (70 - 65 = 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 65 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 1 provider is registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1386023885, enumerated as an "individual" on May 29, 2015.
The provider is located at 4200 18TH ST STE 204 SAN FRANCISCO, CA 94114 and the phone number is (415) 948-6464.
Massage Therapist with taxonomy code 225700000X.
