DR. CARRISSIA KEELING OTD, OTR/L
NPI 1821789751
Occupational Therapist - Mental Health in San Francisco, CA
NPI Status: Active since May 19, 2023
Contact Information
98 BOSWORTH ST
SAN FRANCISCO, CA
ZIP 94112
Phone: (415) 551-0975
Some details in this NPI profile have been updated in the NPI registry within the last 30 days.
- Individual
- Female
- Occupational Therapist
- Mental Health
About CARRISSIA KEELING
This page provides the complete NPI Profile along with additional information for Carrissia Keeling, a provider established in San Francisco, California with a medical specialization in Occupational Therapist, focusing in mental health . The healthcare provider is registered in the NPI registry with number 1821789751 assigned on May 2023. The practitioner's primary taxonomy code is 225XM0800X with license number 29021 (CA). The provider is registered as an individual and her NPI record was last updated May 2026.
- NPI
- 1821789751
- Provider Name
- DR. CARRISSIA KEELING OTD, OTR/L
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 98 BOSWORTH ST SAN FRANCISCO, CA 94112
- Location Phone
- (415) 551-0975
- Mailing Address
- 98 BOSWORTH ST SAN FRANCISCO, CA 94112
- Mailing Phone
- (415) 551-0975
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-19-2023
- Last Update Date
- 05-29-2026
- 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
Occupational Therapist Mental Health
- Taxonomy Code
- 225XM0800X
- Type
- Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- License No.
- 29021
- License State
- CA
- Taxonomy Description
- Occupational therapists provide treatment for people recovering from a mental or physical illness to regain their independence and stability and to engage in normal daily occupations (work, home, family life, school, leisure). Occupational therapists provide particular emphasis on interventions that result in improved quality of life and decrease hospitalization.
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 | 171M00000X | Other Service Providers | Case Manager/Care Coordinator | |
| 2 | 225400000X | Respiratory, Developmental, Rehabilitative and Restorative Service Providers | Rehabilitation Practitioner |
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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 1821789751, 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.
SAN FRANCISCO, CA 94112
SAN FRANCISCO, CA 94112
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1821789751, enumerated as an "individual" on May 19, 2023.
The provider is located at 98 BOSWORTH ST SAN FRANCISCO, CA 94112 and the phone number is (415) 551-0975.
Occupational Therapist with taxonomy code 225XM0800X and a focus in Mental Health.
