DR. WILLIAM LARSEN PHARMD
NPI 1245168392
Pharmacist - Cardiology in Durham, NC
NPI Status: Active since May 11, 2026
Contact Information
2301 ERWIN RD
DURHAM, NC
ZIP 27705
Phone: (919) 684-8111
This NPI profile has been added to the NPI registry within the last 30 days.
- Individual
- Male
- Pharmacist
- Cardiology
About WILLIAM LARSEN
This page provides the complete NPI Profile along with additional information for William Larsen, a provider established in Durham, North Carolina with a medical specialization in Pharmacist, focusing in cardiology . The healthcare provider is registered in the NPI registry with number 1245168392 assigned on May 2026. The practitioner's primary taxonomy code is 1835C0206X with license number 32202 (NC). The provider is registered as an individual and his NPI record was last updated May 2026.
- NPI
- 1245168392
- Provider Name
- DR. WILLIAM LARSEN PHARMD
- Other Name
- DR. BILL LARSEN PHARMD
- Other Name Type
- Other Name (5)
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 2301 ERWIN RD DURHAM, NC 27705
- Location Phone
- (919) 684-8111
- Mailing Address
- 2301 ERWIN RD DURHAM, NC 27705
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-11-2026
- Last Update Date
- 05-11-2026
- 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
Pharmacist Cardiology
- Taxonomy Code
- 1835C0206X
- Type
- Pharmacy Service Providers
- License No.
- 32202
- License State
- NC
- Taxonomy Description
- A licensed pharmacist who has demonstrated specialized knowledge and skill in direct patient care to ensure safe and effective use of medications in patients with cardiovascular disease, as members of interprofessional health care teams.
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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 1245168392, we treat the final digit (2) 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).
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 68 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.
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
DURHAM, NC 27705
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1245168392, enumerated as an "individual" on May 11, 2026.
The provider is located at 2301 ERWIN RD DURHAM, NC 27705 and the phone number is (919) 684-8111.
Pharmacist with taxonomy code 1835C0206X and a focus in Cardiology.
