CHARLES C. KOO MD
NPI 1609947597
Pathology - Hematology in Los Angeles, CA

NPI Status: Active since November 13, 2006

Contact Information

4733 W SUNSET BLVD
LOS ANGELES, CA
ZIP 90027
Phone: (323) 783-4011

NPI Profile Information
Primary Taxonomy
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Pathology
Hematology

About CHARLES KOO

This page provides the complete NPI Profile along with additional information for Charles Koo, a provider established in Los Angeles, California with a medical specialization in Pathology, focusing in hematology . The healthcare provider is registered in the NPI registry with number 1609947597 assigned on November 2006. The practitioner's primary taxonomy code is 207ZH0000X with license number A36623 (CA). The provider is registered as an individual and his NPI record was last updated 17 years ago.

NPI: 1609947597
Provider Name: CHARLES C. KOO MD
Other Name: CHAE HOON KOO M.D.
Other Name Type: Professional Name (2)
Gender: Male
Entity Type: Individual
Location Address: 4733 W SUNSET BLVD LOS ANGELES, CA 90027
Location Phone: (323) 783-4011
Mailing Address: 4733 W SUNSET BLVD LOS ANGELES, CA 90027
Mailing Phone: (323) 783-4011
Is Sole Proprietor?: No
Enumeration Date: 11-13-2006
Last Update Date: 01-22-2009
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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: Pathology Hematology
Taxonomy Code: 207ZH0000X
Type: Allopathic & Osteopathic Physicians
License No.: A36623
License State: CA
Taxonomy Description: A hematopathologist is expert in diseases that affect blood cells, blood clotting mechanisms, bone marrow and lymph nodes. This physician has the knowledge and technical skills essential for the laboratory diagnosis of anemias, leukemias, lymphomas, bleeding disorders and blood clotting disorders.

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 1609947597, we treat the final digit (7) 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 73. The final step is to find the difference between that total and the next multiple of ten (80 - 73 = 7).

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

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 14 → 1 + 4

Pos 8

Unchanged

Pos 9

Doubled → 18 → 1 + 8

Check

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 0 → 0 9 → 18 → 9 7 → 14 → 5 9 → 18 → 9

Step 2: Add all digits plus the NPI constant

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

2 + 6 + 0 + 9 + 1 + 8 + 4 + 1 + 4 + 5 + 1 + 8 + 24 = 73

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

The next multiple of ten after 73 is 80. The difference is the calculated check digit.

80 - 73 = 7

This NPI is valid

The calculated check digit is 7, which matches the last digit of 1609947597.