GASTROENTEROLOGY MEDICAL GROUP, INC.
NPI 1811040967
Internal Medicine - Gastroenterology in Concord, CA

NPI Status: Active since January 20, 2007

Contact Information

2415 HIGH SCHOOL AVE
SUITE 100
CONCORD, CA
ZIP 94520
Phone: (925) 687-9650
Fax: (925) 685-8447

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  • Organization
  • Internal Medicine
  • Gastroenterology

About GASTROENTEROLOGY MEDICAL GROUP, INC.

This page provides the complete NPI Profile along with additional information for Gastroenterology Medical Group, Inc., an internist established in Concord, California operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1811040967 assigned on January 2007. The practitioner's primary taxonomy code is 207RG0100X with license number G268490 (CA). 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 Dr. Richard Augustus Messian M.d. (Ceo)

NPI
1811040967
Provider Name
GASTROENTEROLOGY MEDICAL GROUP, INC.
Entity Type
Organization
Location Address
2415 HIGH SCHOOL AVE SUITE 100 CONCORD, CA 94520
Location Phone
(925) 687-9650
Location Fax
(925) 685-8447
Mailing Address
2415 HIGH SCHOOL AVE SUITE 100 CONCORD, CA 94520
Mailing Phone
(925) 687-9650
Mailing Fax
(925) 685-8447
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
01-20-2007
Last Update Date
02-27-2008
Code Navigator

An internist like Gastroenterology Medical Group, Inc. 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
License No.
G268490
License State
CA
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.

Insurance Plans Accepted

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

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

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.

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

DR. RICHARD AUGUSTUS MESSIAN M.D.

Authorized Official Title
CEO
Authorized Official Phone
(925) 687-9650

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 Identifier Issuer
A43114MEDICARE UPIN (02)CA 
ZZZ17260ZMEDICARE PIN (08)CA 

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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 1811040967, 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 53. The final step is to find the difference between that total and the next multiple of ten (60 - 53 = 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
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
1
Doubled → 2
Pos 4
1
Unchanged
Pos 5
0
Doubled → 0
Pos 6
4
Unchanged
Pos 7
0
Doubled → 0
Pos 8
9
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
7
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 1 → 2 0 → 0 0 → 0 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 8 + 2 + 1 + 0 + 4 + 0 + 9 + 1 + 2 + 24 = 53

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

The next multiple of ten after 53 is 60. The difference is the calculated check digit.

60 - 53 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1811040967.

Other Providers at the Same Location


The following 12 providers are registered at the same or a nearby location.

Internal Medicine
2415 HIGH SCHOOL AVE, SUITE #800
CONCORD, CA 94520
Internal Medicine
2415 HIGH SCHOOL AVE, SUITE 700
CONCORD, CA 94520
Audiologist
2415 HIGH SCHOOL AVE, #300
CONCORD, CA 94520
Internal Medicine (Gastroenterology)
2415 HIGH SCHOOL AVE, SUITE 100
CONCORD, CA 94520
Internal Medicine
2415 HIGH SCHOOL AVE, SUITE 800
CONCORD, CA 94520
Nurse Practitioner (Family)
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Physician Assistant
2415 HIGH SCHOOL AVE
CONCORD, CA 94520
Internal Medicine
2415 HIGH SCHOOL AVE, SUITE 800
CONCORD, CA 94520
Family Medicine
2415 HIGH SCHOOL AVE, SUITE 800
CONCORD, CA 94520
Audiologist-Hearing Aid Fitter
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Audiologist-Hearing Aid Fitter
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Audiologist-Hearing Aid Fitter
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1811040967, enumerated as an "organization" on January 20, 2007.

The provider is located at 2415 HIGH SCHOOL AVE SUITE 100 CONCORD, CA 94520 and the phone number is (925) 687-9650.

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

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.