PENINSULA GASTROINTESTINAL
NPI 1306144209
Internal Medicine - Gastroenterology in San Mateo, CA
NPI Status: Active since March 02, 2011
Contact Information
100 S ELLSWORTH AVE
SUITE 507
SAN MATEO, CA
ZIP 94401
Phone: (650) 342-7432
Fax: (650) 342-3239
- Organization
- Internal Medicine
- Gastroenterology
- Accepts Insurance
- CLIA Number: 05D2306662
- CLIA Cert. Type: Physician Office
- CLIA Exp. Date: 12-03-2027
About PENINSULA GASTROINTESTINAL
This page provides the complete NPI Profile along with additional information for Peninsula Gastrointestinal, an internist established in San Mateo, California operating as a Internal Medicine, focusing in gastroenterology . The healthcare provider is registered in the NPI registry with number 1306144209 assigned on March 2011. The practitioner's primary taxonomy code is 207RG0100X. The provider is registered as an organization and their NPI record was last updated 10 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 Edward K Onuma Md (President)
- NPI
- 1306144209
- Provider Name
- PENINSULA GASTROINTESTINAL
- Entity Type
- Organization
- Location Address
- 100 S ELLSWORTH AVE SUITE 507 SAN MATEO, CA 94401
- Location Phone
- (650) 342-7432
- Location Fax
- (650) 342-3239
- Mailing Address
- 100 S ELLSWORTH AVE SUITE 507 SAN MATEO, CA 94401
- Mailing Phone
- (650) 342-7432
- Is Sole Proprietor?
- No
- Is Organization Subpart?
- No
- Enumeration Date
- 03-02-2011
- Last Update Date
- 08-18-2016
- Code Navigator
An internist like Peninsula Gastrointestinal 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.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Balance by Medica Bronze $0 Copay PCP Visits - EPO
- Balance by Medica Bronze $0 Copay PCP Visits - PPO
- Balance by Medica Bronze Premier - EPO
- Balance by Medica Bronze Premier - PPO
- Balance by Medica Expanded Bronze Standard - EPO
- Balance by Medica Expanded Bronze Standard - PPO
- Balance by Medica Gold $0 Copay PCP Visits - EPO
- Balance by Medica Gold $0 Copay PCP Visits - PPO
- Balance by Medica Gold Share - EPO
- Balance by Medica Gold Share - PPO
- Balance by Medica Gold Standard - EPO
- Balance by Medica Gold Standard - PPO
- Balance by Medica Silver $0 Copay PCP Visits - EPO
- Balance by Medica Silver $0 Copay PCP Visits - PPO
- Balance by Medica Silver Share - EPO
- Balance by Medica Silver Share - PPO
- Balance by Medica Silver Standard - EPO
- Balance by Medica Silver Standard - PPO
- Elevate by Medica Bronze $0 Copay PCP Visits - EPO
- Elevate by Medica Bronze Premier - EPO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
CLIA Information
The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:
- CLIA Number
- 05D2306662
- Facility Type
- Physician Office
- Certificate Effective Date
- December 04, 2025
- Certificate Expiration Date
- December 03, 2027
- Laboratory Director
- JIN GUO
- Certificate Type
- Certificate of Compliance
- Certificate Type Description
- This CLIA certificate is issued to Peninsula Gastrointestinal after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements. This type of certificate is issued to laboratories that perform nonwaived (moderate and/or high complexity) testing.
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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 1306144209, we treat the final digit (9) 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 51. The final step is to find the difference between that total and the next multiple of ten (60 - 51 = 9).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 51 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
SAN MATEO, CA 94401
SAN MATEO, CA 94401
SAN MATEO, CA 94401
SAN MATEO, CA 94401
SAN MATEO, CA 94401
SAN MATEO, CA 94401
SAN MATEO, CA 94401
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1306144209, enumerated as an "organization" on March 02, 2011.
The provider is located at 100 S ELLSWORTH AVE SUITE 507 SAN MATEO, CA 94401 and the phone number is (650) 342-7432.
Internal Medicine with taxonomy code 207RG0100X and a focus in Gastroenterology.
The provider might be accepting Accepts: Medica. Please consult your insurance carrier or call the provider to verify.
