DR. JOSEPH CHAN M.D.
NPI 1043256720
Radiology - Diagnostic Radiology in Walnut Creek, CA

NPI Status: Active since June 21, 2006

Contact Information

2125 OAK GROVE RD
SUITE 200
WALNUT CREEK, CA
ZIP 94598
Phone: (925) 296-7150
Fax: (925) 296-7171

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

Individual
Male
Radiology
Diagnostic Radiology

About JOSEPH CHAN

This page provides the complete NPI Profile along with additional information for Joseph Chan, a provider established in Walnut Creek, California with a medical specialization in Radiology, focusing in diagnostic radiology . The healthcare provider is registered in the NPI registry with number 1043256720 assigned on June 2006. The practitioner's primary taxonomy code is 2085R0202X with license number C39122 (CA). The provider is registered as an individual and his NPI record was last updated 11 years ago.

NPI: 1043256720
Provider Name: DR. JOSEPH CHAN M.D.
Gender: Male
Entity Type: Individual
Location Address: 2125 OAK GROVE RD SUITE 200 WALNUT CREEK, CA 94598
Location Phone: (925) 296-7150
Location Fax: (925) 296-7171
Mailing Address: 2125 OAK GROVE RD SUITE 200 WALNUT CREEK, CA 94598
Mailing Phone: (925) 296-7150
Mailing Fax: (925) 296-7171
Is Sole Proprietor?: No
Enumeration Date: 06-21-2006
Last Update Date: 04-02-2015
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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: Radiology Diagnostic Radiology
Taxonomy Code: 2085R0202X
Type: Allopathic & Osteopathic Physicians
License No.: C39122
License State: CA
Taxonomy Description: A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Medicare

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Medicaid

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier	Type / Code	Identifier State
00C391221	MEDICARE PIN (08)	CA
00C3912217	MEDICARE PIN (08)	CA
00C3912219	MEDICARE PIN (08)	CA
00C391229	MEDICARE PIN (08)	CA
300104835	MEDICARE PIN (08)	CA
300105950	MEDICARE PIN (08)	CA
00C3912218	MEDICARE PIN (08)	CA
00C391224	MEDICARE PIN (08)	CA
00C391220	MEDICARE PIN (08)	CA
00C3912211	MEDICARE PIN (08)	CA
00C3912212	MEDICARE PIN (08)	CA
00C3912220	MEDICARE PIN (08)	CA
00C391223	MEDICARE PIN (08)	CA
A37067	MEDICARE UPIN (02)	CA
00C391227	MEDICARE PIN (08)	CA
00C3912214	MEDICARE PIN (08)	CA
300106004	MEDICARE PIN (08)	CA
00C3912213	MEDICARE PIN (08)	CA
00C3912216	MEDICARE PIN (08)	CA
00C391225	MEDICARE PIN (08)	CA
00C3912210	MEDICARE PIN (08)	CA
00C3912215	MEDICARE PIN (08)	CA
00C391222	MEDICARE PIN (08)	CA
00C391228	MEDICARE PIN (08)	CA
00C391226	MEDICARE PIN (08)	CA

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 1043256720, we treat the final digit (0) 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 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

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 → 8

Pos 4

Unchanged

Pos 5

Doubled → 4

Pos 6

Unchanged

Pos 7

Doubled → 12 → 1 + 2

Pos 8

Unchanged

Pos 9

Doubled → 4

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 4 → 8 2 → 4 6 → 12 → 3 2 → 4

Step 2: Add all digits plus the NPI constant

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

2 + 0 + 8 + 3 + 4 + 5 + 1 + 2 + 7 + 4 + 24 = 60

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

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

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1043256720.