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GERALD L TARDER M.D.
NPI 1396833984
Internal Medicine - Gastroenterology in Walnut Creek, CA

Active since October 10, 2006PECOS Enrolled
130 LA CASA VIA, STE 107, WALNUT CREEK, CA 94598(925) 938-6060(925) 938-0119 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Gerald L Tarder M.d. NPPES

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

GERALD L TARDER M.D. (NPI 1396833984) is an individual gastroenterology provider in Walnut Creek, California, licensed in California (G26001) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396833984
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameGERALD L TARDERCredential: M.D.
Location Address130 LA CASA VIA, STE 107Walnut Creek, CA 94598-3045
Mailing Address130 La Casa Via, Ste 107Walnut Creek, CA 94598-3045 · (925) 938-6060 · Fax (925) 938-0119
Phone(925) 938-6060
Fax(925) 938-0119
Sole ProprietorYes
Enumeration DateOctober 10, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1396833984 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 · G26001
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.
130 LA CASA VIA, Walnut Creek, CA 94598
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gerald L Tarder M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
48 services46 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
29 services25 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
26 services25 patients
Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery 45384
This procedure involves using a flexible tube with a camera, called an endoscope, to view the large intestine. If any abnormal growths or polyps are found, they are removed with an electrically-heated instrument. This is a common way to prevent bowel issues.
24 services23 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
24 services21 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
20 services20 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

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

DR. NATHAN DAVID SCHULTZ M.D.
Allergy & Immunology
130 LA CASA VIA, BLDG 2, STE 209
WALNUT CREEK, CA 94598
Contra Costa County (925) 935-6252
MS. ANGELA CHRISTIAN N.P.
Nurse Practitioner
130 LA CASA VIA, SUITE 209
WALNUT CREEK, CA 94598
Contra Costa County (925) 935-6252
BARBARA IRENE KARPEL MD
Allergy & Immunology
130 LA CASA VIA, BLDG 2 STE 209
WALNUT CREEK, CA 94598
Contra Costa County (925) 930-6252
HUGH RICHARD WINIG M.D.
Psychiatry & Neurology (Psychiatry)
130 LA CASA VIA, #213
WALNUT CREEK, CA 94598
Contra Costa County (925) 938-4114
DR. MICHAEL STEPHEN BAKER M.D.
Surgery
130 LA CASA VIA, BUILDING 3, SUITE 211
WALNUT CREEK, CA 94598
Contra Costa County (925) 933-0984
DR. JAMAL JULIAN ZAKA M. D.
Internal Medicine (Pulmonary Disease)
130 LA CASA VIA, #208
WALNUT CREEK, CA 94598
Contra Costa County (925) 944-0166
DR. IRENE JIA-SHIN LO M.D.
Surgery
130 LA CASA VIA, BUILDING 3, SUITE 211
WALNUT CREEK, CA 94598
Contra Costa County (925) 933-0984
DR. NANCY BROITMAN MOZELSIO MD
Allergy & Immunology
130 LA CASA VIA, BLDG 2, #209
WALNUT CREEK, CA 94598
Contra Costa County (925) 935-6252

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 Gerald Tarder's NPI number?

The NPI number for Gerald Tarder is 1396833984. It was assigned to this individual provider in the NPPES registry on October 10, 2006.

Where is Gerald Tarder located?

Gerald Tarder practices at 130 La Casa Via Ste 107, Walnut Creek, CA 94598. The listed phone number is (925) 938-6060.

What is Gerald Tarder's specialty?

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

Is Gerald Tarder enrolled in Medicare?

Yes. Gerald Tarder is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gerald Tarder was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.