JOANNA GWEN CLARK P.T.
NPI 1730437815
Doula in Richmond, CA
NPI Status: Active since August 21, 2012
Contact Information
2744 RHEEM AVE
RICHMOND, CA
ZIP 94804
Phone: (510) 621-9364
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Female
- Doula
About JOANNA CLARK
This page provides the complete NPI Profile along with additional information for Joanna Clark, a provider established in Richmond, California with a medical specialization in Doula. The healthcare provider is registered in the NPI registry with number 1730437815 assigned on August 2012. The practitioner's primary taxonomy code is 374J00000X. The provider is registered as an individual and her NPI record was last updated June 2026.
- NPI
- 1730437815
- Provider Name
- JOANNA GWEN CLARK P.T.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 2744 RHEEM AVE RICHMOND, CA 94804
- Location Phone
- (510) 621-9364
- Mailing Address
- 2744 RHEEM AVE RICHMOND, CA 94804
- Mailing Phone
- (510) 621-9364
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 08-21-2012
- Last Update Date
- 06-19-2026
- 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
Doula
- Taxonomy Code
- 374J00000X
- Type
- Nursing Service Related Providers
- Taxonomy Description
- Doulas work in a variety of settings and have been trained to provide physical, emotional, and informational support to a mother before, during, and just after birth and/or provide emotional and practical support to a mother during the postpartum period.
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 | 225100000X | Respiratory, Developmental, Rehabilitative and Restorative Service Providers | Physical Therapist | PT 38876 (CA) |
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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 1730437815, 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.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1730437815, enumerated as an "individual" on August 21, 2012.
The provider is located at 2744 RHEEM AVE RICHMOND, CA 94804 and the phone number is (510) 621-9364.
Doula with taxonomy code 374J00000X.
