CALUM WINTER NELSON PHARMD, APH, BCPS
NPI 1326631078
Pharmacist - Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist in Los Angeles, CA

NPI Status: Active since February 13, 2021

Contact Information

1225 WILSHIRE BLVD
LOS ANGELES, CA
ZIP 90017
Phone: (213) 977-2121

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  • Individual
  • Male
  • Pharmacist
  • Pharmacist Clinician (PhC)/ Clinical Pha...

About CALUM NELSON

This page provides the complete NPI Profile along with additional information for Calum Nelson, a provider established in Los Angeles, California with a medical specialization in Pharmacist, focusing in pharmacist clinician (phc)/ clinical pharmacy specialist . The healthcare provider is registered in the NPI registry with number 1326631078 assigned on February 2021. The practitioner's primary taxonomy code is 1835P0018X with license number APH11298 (CA). The provider is registered as an individual and his NPI record was last updated April 2026.

NPI
1326631078
Provider Name
CALUM WINTER NELSON PHARMD, APH, BCPS
Gender
Male
Entity Type
Individual
Location Address
1225 WILSHIRE BLVD LOS ANGELES, CA 90017
Location Phone
(213) 977-2121
Mailing Address
1225 WILSHIRE BLVD LOS ANGELES, CA 90017
Mailing Phone
(213) 977-2121
Is Sole Proprietor?
No
Enumeration Date
02-13-2021
Last Update Date
04-19-2026
Code Navigator

A pharmacist like Calum Nelson 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 Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist

Taxonomy Code
1835P0018X
Type
Pharmacy Service Providers
License No.
APH11298
License State
CA
Taxonomy Description
Pharmacist Clinician/Clinical Pharmacy Specialist is a pharmacist with additional training and an expanded scope of practice that may include prescriptive authority, therapeutic management, and disease management.

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)
1183500000XPharmacy Service Providers

Pharmacist

RPH82894 (CA)
21835P1200XPharmacy Service Providers

Pharmacist
Pharmacotherapy

RPH82894 (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 1326631078, we treat the final digit (8) 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 52. The final step is to find the difference between that total and the next multiple of ten (60 - 52 = 8).

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.

Pos 1
1
Doubled → 2
Pos 2
3
Unchanged
Pos 3
2
Doubled → 4
Pos 4
6
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
3
Unchanged
Pos 7
1
Doubled → 2
Pos 8
0
Unchanged
Pos 9
7
Doubled → 14 → 1 + 4
Check
8
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 2 → 4 6 → 12 → 3 1 → 2 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 3 + 4 + 6 + 1 + 2 + 3 + 2 + 0 + 1 + 4 + 24 = 52

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 52 is 60. The difference is the calculated check digit.

60 - 52 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1326631078.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Emergency Medicine
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Urology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Physician Assistant
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Pharmacist
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Anesthesiology
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017
Nurse Practitioner (Acute Care)
1225 WILSHIRE BLVD
LOS ANGELES, CA 90017

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1326631078, enumerated as an "individual" on February 13, 2021.

The provider is located at 1225 WILSHIRE BLVD LOS ANGELES, CA 90017 and the phone number is (213) 977-2121.

Pharmacist with taxonomy code 1835P0018X and a focus in Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist.