GERALD L TARDER, MD A PROFESSIONAL CORPORATION
NPI 1447424908
Internal Medicine - Gastroenterology in Walnut Creek, CA

NPI Status: Active since April 16, 2008

Contact Information

130 LA CASA VIA B2 107
WALNUT CREEK, CA
ZIP 94598
Phone: (925) 938-6060
Fax: (925) 938-0119

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  • Organization
  • Internal Medicine
  • Gastroenterology

About GERALD L TARDER, MD A PROFESSIONAL CORPORATION

This page provides the complete NPI Profile along with additional information for Gerald L Tarder, Md A Professional Corporation, an internist established in Walnut Creek, California operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1447424908 assigned on April 2008. The practitioner's primary taxonomy code is 207RG0100X. The provider is registered as an organization and their NPI record was last updated 18 years ago. The organization operates as a Single Specialty Group with one or more individual practitioners, all of who practice with the same area of specialization. The authorized official of this NPI record is Gerald L Tarder Md (Owner)

NPI
1447424908
Provider Name
GERALD L TARDER, MD A PROFESSIONAL CORPORATION
Entity Type
Organization
Location Address
130 LA CASA VIA B2 107 WALNUT CREEK, CA 94598
Location Phone
(925) 938-6060
Location Fax
(925) 938-0119
Mailing Address
130 LA CASA VIA B2 107 WALNUT CREEK, CA 94598
Mailing Phone
(925) 938-6060
Mailing Fax
(925) 938-0119
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
04-16-2008
Last Update Date
04-16-2008
Code Navigator

An internist like Gerald L Tarder, Md A Professional Corporation 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 Gastroenterology

Taxonomy Code
207RG0100X
Type
Allopathic & Osteopathic Physicians
Taxonomy Description
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Group Taxonomy 193400000X SINGLE SPECIALTY GROUP

This provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

GERALD L TARDER MD

Authorized Official Title
OWNER
Authorized Official Phone
(925) 938-6060

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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 1447424908, 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
4
Doubled → 8
Pos 4
7
Unchanged
Pos 5
4
Doubled → 8
Pos 6
2
Unchanged
Pos 7
4
Doubled → 8
Pos 8
9
Unchanged
Pos 9
0
Doubled → 0
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 4 → 8 4 → 8 4 → 8 0 → 0

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 8 + 7 + 8 + 2 + 8 + 9 + 0 + 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 1447424908.

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1447424908, enumerated as an "organization" on April 16, 2008.

The provider is located at 130 LA CASA VIA B2 107 WALNUT CREEK, CA 94598 and the phone number is (925) 938-6060.

Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.