GORDON MAH PHARMD
NPI 1295601474
Pharmacist - Oncology in San Francisco, CA
NPI Status: Active since October 14, 2025
Contact Information
2351 CLAY ST # 507
SAN FRANCISCO, CA
ZIP 94115
Phone: (415) 335-5704
- Individual
- Male
- Pharmacist
- Oncology
About GORDON MAH
This page provides the complete NPI Profile along with additional information for Gordon Mah, a provider established in San Francisco, California with a medical specialization in Pharmacist, focusing in oncology . The healthcare provider is registered in the NPI registry with number 1295601474 assigned on October 2025. The practitioner's primary taxonomy code is 1835X0200X with license number 88732 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1295601474
- Provider Name
- GORDON MAH PHARMD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 2351 CLAY ST # 507 SAN FRANCISCO, CA 94115
- Location Phone
- (415) 335-5704
- Mailing Address
- 1733 RIVERA ST SAN FRANCISCO, CA 94116
- Mailing Phone
- (415) 335-5704
- Is Sole Proprietor?
- No
- Enumeration Date
- 10-14-2025
- Last Update Date
- 10-14-2025
- Code Navigator
A pharmacist like Gordon Mah fills prescription medications, verifying instructions from physicians and offers expertise in the safe use of prescriptions. Pharmacists instruct patients on how to take a prescribed medicine and educate patients about potential side effects. Pharmacists might also conduct health and wellness screenings, provide immunizations, oversee the medications given to patients, and provide advice on healthy lifestyles.
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
Pharmacist Oncology
- Taxonomy Code
- 1835X0200X
- Type
- Pharmacy Service Providers
- License No.
- 88732
- License State
- CA
- Taxonomy Description
- A licensed pharmacist who has demonstrated specialized knowledge and skill in developing, recommending, implementing, monitoring, and modifying pharmacotherapeutic plans to optimize outcomes in patients with malignant diseases.
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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 1295601474, we treat the final digit (4) 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 56. The final step is to find the difference between that total and the next multiple of ten (60 - 56 = 4).
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 56 is 60. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1295601474, enumerated as an "individual" on October 14, 2025.
The provider is located at 2351 CLAY ST # 507 SAN FRANCISCO, CA 94115 and the phone number is (415) 335-5704.
Pharmacist with taxonomy code 1835X0200X and a focus in Oncology.
