DR. HELEN CHIH SHEN CHANG M.D.
NPI 1427278688
Internal Medicine in Los Gatos, CA

NPI Status: Active since April 27, 2007

Contact Information

15195 NATIONAL AVE
SUITE 205
LOS GATOS, CA
ZIP 95032
Phone: (408) 358-9917
Fax: (408) 358-9927

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  • Individual
  • Female
  • Internal Medicine

About HELEN CHANG

This page provides the complete NPI Profile along with additional information for Helen Chang, an internist established in Los Gatos, California with a medical specialization in Internal Medicine. The healthcare provider is registered in the NPI registry with number 1427278688 assigned on April 2007. The practitioner's primary taxonomy code is 207R00000X with license number A37547 (CA). The provider is registered as an individual and her NPI record was last updated 19 years ago.

NPI
1427278688
Provider Name
DR. HELEN CHIH SHEN CHANG M.D.
Other Name
DR. CHIH SHEN CHANG
Other Name Type
Other Name (5)
Gender
Female
Entity Type
Individual
Location Address
15195 NATIONAL AVE SUITE 205 LOS GATOS, CA 95032
Location Phone
(408) 358-9917
Location Fax
(408) 358-9927
Mailing Address
15195 NATIONAL AVE., SUITE 205 LOS GATOS,, CA 95032
Mailing Phone
(408) 358-9917
Mailing Fax
(408) 358-9927
Is Sole Proprietor?
Yes
Enumeration Date
04-27-2007
Last Update Date
07-08-2007
Code Navigator

An internist like Helen Chang 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

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
A37547
License State
CA
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

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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 1427278688, 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 72. The final step is to find the difference between that total and the next multiple of ten (80 - 72 = 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
4
Unchanged
Pos 3
2
Doubled → 4
Pos 4
7
Unchanged
Pos 5
2
Doubled → 4
Pos 6
7
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
6
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
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 2 → 4 8 → 16 → 7 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 4 + 7 + 4 + 7 + 1 + 6 + 6 + 1 + 6 + 24 = 72

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

The next multiple of ten after 72 is 80. The difference is the calculated check digit.

80 - 72 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1427278688.

Other Providers at the Same Location


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

Radiology (Diagnostic Radiology)
15195 NATIONAL AVE, SUITE 201
LOS GATOS, CA 95032
Ophthalmology
15195 NATIONAL AVE, 206
LOS GATOS, CA 95032
Anesthesiology
15195 NATIONAL AVE, #100
LOS GATOS, CA 95032
Obstetrics & Gynecology (Gynecology)
15195 NATIONAL AVE, SUITE 201
LOS GATOS, CA 95032
Specialist
15195 NATIONAL AVE, STE. 201
LOS GATOS, CA 95032
Clinic/Center (Ambulatory Surgical)
15195 NATIONAL AVE, STE 201
LOS GATOS, CA 95032
Obstetrics & Gynecology
15195 NATIONAL AVE, SUITE207
LOS GATOS, CA 95032
Colon & Rectal Surgery
15195 NATIONAL AVE, STE. #202
LOS GATOS, CA 95032
Advanced Practice Midwife
15195 NATIONAL AVE, SUITE 207
LOS GATOS, CA 95032
Colon & Rectal Surgery
15195 NATIONAL AVE, SUITE 202
LOS GATOS, CA 95032
Ophthalmology
15195 NATIONAL AVE, SUITE 206
LOS GATOS, CA 95032
Anesthesiology (Pain Medicine)
15195 NATIONAL AVE, SUITE # 205
LOS GATOS, CA 95032
Obstetrics & Gynecology (Gynecology)
15195 NATIONAL AVE, SUITE 201
LOS GATOS, CA 95032
Clinic/Center (Radiology, Mammography)
15195 NATIONAL AVE, SUITE201
LOS GATOS, CA 95032
Anesthesiology
15195 NATIONAL AVE, SUITE 205
LOS GATOS, CA 95032
Family Medicine
15195 NATIONAL AVE, 205
LOS GATOS, CA 95032
Family Medicine
15195 NATIONAL AVE, SUITE 205
LOS GATOS, CA 95032
Family Medicine
15195 NATIONAL AVE, 205
LOS GATOS, CA 95032
Clinic/Center (Primary Care)
15195 NATIONAL AVE, SUITE 205
LOS GATOS, CA 95032
Obstetrics & Gynecology
15195 NATIONAL AVE, STE 207
LOS GATOS, CA 95032

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1427278688, enumerated as an "individual" on April 27, 2007.

The provider is located at 15195 NATIONAL AVE SUITE 205 LOS GATOS, CA 95032 and the phone number is (408) 358-9917.

Internal Medicine with taxonomy code 207R00000X.