DR. GWENDOLYN ANN JOHNSTON RPH
NPI 1689214363
Pharmacist in Piscataway, NJ
NPI Status: Active since January 10, 2020
Contact Information
671 HOES LN W
PISCATAWAY, NJ
ZIP 08854
Phone: (732) 235-4381
- Individual
- Female
- Pharmacist
About GWENDOLYN JOHNSTON
This page provides the complete NPI Profile along with additional information for Gwendolyn Johnston, a provider established in Piscataway, New Jersey with a medical specialization in Pharmacist. The healthcare provider is registered in the NPI registry with number 1689214363 assigned on January 2020. The practitioner's primary taxonomy code is 183500000X with license number 28RI04161400 (NJ). The provider is registered as an individual and her NPI record was last updated one year ago.
- NPI
- 1689214363
- Provider Name
- DR. GWENDOLYN ANN JOHNSTON RPH
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 671 HOES LN W PISCATAWAY, NJ 08854
- Location Phone
- (732) 235-4381
- Mailing Address
- 19 PARK PL FLANDERS, NJ 07836
- Mailing Phone
- (267) 227-8727
- Is Sole Proprietor?
- No
- Enumeration Date
- 01-10-2020
- Last Update Date
- 02-13-2025
- Code Navigator
A pharmacist like Gwendolyn Johnston 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
- Taxonomy Code
- 183500000X
- Type
- Pharmacy Service Providers
- License No.
- 28RI04161400
- License State
- NJ
- Taxonomy Description
- An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. The practice of pharmacy includes, but is not limited to, assessment, interpretation, evaluation, and implementation, initiation, monitoring or modification of medication and or medical orders; the compounding or dispensing of medication and or medical orders; participation in drug and device procurement, storage, and selection; drug administration; drug regimen reviews; drug or drug-related research; provision of patient education and the provision of those acts or services necessary to provide medication therapy management services in all areas of patient care.
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 | 183500000X | Pharmacy Service Providers | Pharmacist | RP453939 (PA) |
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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 1689214363, we treat the final digit (3) 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 67. The final step is to find the difference between that total and the next multiple of ten (70 - 67 = 3).
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 67 is 70. The difference is the calculated check digit.
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The following 20 providers are registered at the same or a nearby location.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1689214363, enumerated as an "individual" on January 10, 2020.
The provider is located at 671 HOES LN W PISCATAWAY, NJ 08854 and the phone number is (732) 235-4381.
Pharmacist with taxonomy code 183500000X.
