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DR. RICHARD AUGUSTUS MESSIAN M.D.
NPI 1609929751
Internal Medicine - Gastroenterology in Concord, CA

Active since January 20, 2007
2415 HIGH SCHOOL AVE, SUITE 100, CONCORD, CA 94520(925) 687-9650(925) 685-8447 Get Directions Write a Review

NPPES record last updated: May 6, 2008. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Richard Augustus Messian M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. RICHARD AUGUSTUS MESSIAN M.D. (NPI 1609929751) is an individual gastroenterology provider in Concord, California, licensed in California (G268490) and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1609929751
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. RICHARD AUGUSTUS MESSIANCredential: M.D.
Location Address2415 HIGH SCHOOL AVE, SUITE 100Concord, CA 94520-1800
Mailing Address2415 High School Ave, Suite 100Concord, CA 94520-1800 · (925) 687-9650 · Fax (925) 685-8447
Phone(925) 687-9650
Fax(925) 685-8447
Sole ProprietorYes
Enumeration DateJanuary 20, 2007
Last NPPES UpdateMay 6, 2008
✔ NPI 1609929751 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · G268490
Definition
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.
2415 HIGH SCHOOL AVE, Concord, CA 94520
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Other Identifiers 3

Medicare UPINA43114CA
Medicare PIN00G268490CA
Other942184663CA · My Corporation Tax Id #

Other Providers at the Same Location NPPES 12

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LORI KAY DANZE M.D.
Internal Medicine
2415 HIGH SCHOOL AVE, SUITE #800
CONCORD, CA 94520
Contra Costa County (925) 687-5210
JOANNA LYNN CHAN
Audiologist
2415 HIGH SCHOOL AVE, #300
CONCORD, CA 94520
Contra Costa County (925) 616-8101
DIABLO VALLEY PRIMARY CARE, INC.
Internal Medicine
2415 HIGH SCHOOL AVE, SUITE 800
CONCORD, CA 94520
Contra Costa County (925) 687-5210
CARDINAL PRIMARY CARE MEDICAL GROUP, INC
Family Medicine
2415 HIGH SCHOOL AVE, SUITE 800
CONCORD, CA 94520
Contra Costa County (925) 687-5210
MRS. MELANIE MARIE ANELLO N.P.-C
Nurse Practitioner (Family)
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Contra Costa County (925) 685-8894
MINTRA SAEFONG PA-C
Physician Assistant
2415 HIGH SCHOOL AVE
CONCORD, CA 94520
Contra Costa County (925) 687-5210
DR. LEIGH FULFORD KJELDSEN AUD
Audiologist-Hearing Aid Fitter
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Contra Costa County (925) 676-8101
DR. SANDRA CUNNANE AU.D.
Audiologist-Hearing Aid Fitter
2415 HIGH SCHOOL AVE, SUITE 300
CONCORD, CA 94520
Contra Costa County (925) 676-8101

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Richard Messian's NPI number?

The NPI number for Richard Messian is 1609929751. It was assigned to this individual provider in the NPPES registry on January 20, 2007.

Where is Richard Messian located?

Richard Messian practices at 2415 High School Ave Suite 100, Concord, CA 94520. The listed phone number is (925) 687-9650.

What is Richard Messian's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Richard Messian was last updated on May 6, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.