DR. CHRISTOPHER AJAY RAJKUMAR MBBS PHD
NPI 1124901053
Internal Medicine - Interventional Cardiology in Los Angeles, CA
NPI Status: Active since July 29, 2025
Contact Information
CEDARS-SINAI
8700 BEVERLY BLVD
LOS ANGELES, CA
ZIP 90048
Phone: (310) 423-3277
- Individual
- Male
- Internal Medicine
- Interventional Cardiology
About CHRISTOPHER RAJKUMAR
This page provides the complete NPI Profile along with additional information for Christopher Rajkumar, an internist established in Los Angeles, California with a medical specialization in Internal Medicine, focusing in interventional cardiology . The healthcare provider is registered in the NPI registry with number 1124901053 assigned on July 2025. The practitioner's primary taxonomy code is 207RI0011X with license number 7419318 (ZZ). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1124901053
- Provider Name
- DR. CHRISTOPHER AJAY RAJKUMAR MBBS PHD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- CEDARS-SINAI 8700 BEVERLY BLVD LOS ANGELES, CA 90048
- Location Phone
- (310) 423-3277
- Mailing Address
- 9000 ASHCROFT AVE WEST HOLLYWOOD, CA 90048
- Mailing Phone
- (424) 332-3833
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-29-2025
- Last Update Date
- 07-29-2025
- Code Navigator
An internist like Christopher Rajkumar is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
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
Internal Medicine Interventional Cardiology
- Taxonomy Code
- 207RI0011X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 7419318
- License State
- ZZ
- Taxonomy Description
- An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.
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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 1124901053, 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 47. The final step is to find the difference between that total and the next multiple of ten (50 - 47 = 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 47 is 50. The difference is the calculated check digit.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1124901053, enumerated as an "individual" on July 29, 2025.
The provider is located at CEDARS-SINAI 8700 BEVERLY BLVD LOS ANGELES, CA 90048 and the phone number is (310) 423-3277.
Internal Medicine with taxonomy code 207RI0011X and a focus in Interventional Cardiology.
