DR. MARGARET KA YEE CHENG PHARM.D
NPI 1124992813
Pharmacist in Orange, CA

NPI Status: Active since October 03, 2025

Contact Information

101 THE CITY DR S
ORANGE, CA
ZIP 92868
Phone: (888) 267-9095

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  • Individual
  • Female
  • Pharmacist

About MARGARET CHENG

This page provides the complete NPI Profile along with additional information for Margaret Cheng, a provider established in Orange, California with a medical specialization in Pharmacist. The healthcare provider is registered in the NPI registry with number 1124992813 assigned on October 2025. The practitioner's primary taxonomy code is 183500000X with license number RPH56084 (CA). The provider is registered as an individual and her NPI record was last updated one year ago.

NPI
1124992813
Provider Name
DR. MARGARET KA YEE CHENG PHARM.D
Gender
Female
Entity Type
Individual
Location Address
101 THE CITY DR S ORANGE, CA 92868
Location Phone
(888) 267-9095
Mailing Address
111 CARDINAL IRVINE, CA 92618
Mailing Phone
(949) 824-6542
Is Sole Proprietor?
No
Enumeration Date
10-03-2025
Last Update Date
10-03-2025
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A pharmacist like Margaret Cheng 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.
RPH56084
License State
CA
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.

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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 1124992813, 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.

Pos 1
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
2
Doubled → 4
Pos 4
4
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
9
Unchanged
Pos 7
2
Doubled → 4
Pos 8
8
Unchanged
Pos 9
1
Doubled → 2
Check
3
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 9 → 18 → 9 2 → 4 1 → 2

Step 2: Add all digits plus the NPI constant

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

2 + 1 + 4 + 4 + 1 + 8 + 9 + 4 + 8 + 2 + 24 = 67

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.

70 - 67 = 3
This NPI is valid
The calculated check digit is 3, which matches the last digit of 1124992813.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
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Internal Medicine (Rheumatology)
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Genetic Counselor, MS
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Urology
101 THE CITY DR S
ORANGE, CA 92868
Nurse Anesthetist, Certified Registered
101 THE CITY DR S
ORANGE, CA 92868
Surgery
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics (Pediatric Nephrology)
101 THE CITY DR S, BLDG. 56, SUITE 600
ORANGE, CA 92868
Otolaryngology (Otology & Neurotology)
101 THE CITY DR S, BLDG 56, SUITE 500 RTE 81
ORANGE, CA 92868
Anesthesiology
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics (Neurodevelopmental Disabilities)
101 THE CITY DR S
ORANGE, CA 92868
Psychiatry & Neurology (Neurology)
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine
101 THE CITY DR S
ORANGE, CA 92868
Urology
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine (Nephrology)
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics
101 THE CITY DR S
ORANGE, CA 92868
Anesthesiology
101 THE CITY DR S
ORANGE, CA 92868
Nurse Anesthetist, Certified Registered
101 THE CITY DR S
ORANGE, CA 92868
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine (Hematology & Oncology)
101 THE CITY DR S
ORANGE, CA 92868

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1124992813, enumerated as an "individual" on October 03, 2025.

The provider is located at 101 THE CITY DR S ORANGE, CA 92868 and the phone number is (888) 267-9095.

Pharmacist with taxonomy code 183500000X.