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DR. RICHARD ALAN ZELNER
NPI 1235274259
Internal Medicine - Gastroenterology in Fountain Valley, CA

Active since February 20, 2007PECOS Enrolled
76.74/100
CMS Quality Rating
18035 BROOKHURST ST., STE. 2100, FOUNTAIN VALLEY, CA 92708(657) 241-9090(714) 665-4603 Get Directions Write a Review

NPPES record last updated: January 11, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 11, 2023, Jan 5, 2022 (2 updates tracked since 2022).

About Dr. Richard Alan Zelner NPPES

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

DR. RICHARD ALAN ZELNER (NPI 1235274259) is an individual gastroenterology provider in Fountain Valley, California, licensed in California (G50987) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1235274259
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. RICHARD ALAN ZELNER
Location Address18035 BROOKHURST ST., STE. 2100Fountain Valley, CA 92708
Mailing Address18035 Brookhurst St., Ste. 2100Fountain Valley, CA 92708 · (657) 241-9090 · Fax (714) 665-4603
Phone(657) 241-9090
Fax(714) 665-4603
Sole ProprietorNo
Enumeration DateFebruary 20, 2007
Last NPPES UpdateJanuary 11, 20232 updates tracked since enumeration
NPPES CertifiedJanuary 11, 2023
✔ NPI 1235274259 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 · G50987
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.
18035 BROOKHURST ST., STE. 2100, Fountain Valley, CA 92708
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Richard Alan Zelner 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.

Medicare Billing Reassignment

Medicare enrollment records show Richard Zelner reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Memorialcare Medical Foundation
0.8 mi
Clinic/Center
17360 BROOKHURST ST
Fountain Valley, CA 92708
  • Reassigned Medicare billing, California enrollment
  • 948 clinicians in this Medicare group
NPI 1205167350 (877) 696-3622

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.74/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality80.94
Promoting Interoperability78
Improvement Activities40
Cost55.12

Other Providers at the Same Location NPPES 3

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

LAUREN DEVAUGHN CNM
Advanced Practice Midwife
18035 BROOKHURST ST., STE. 2100
FOUNTAIN VALLEY, CA 92708
Orange County (657) 241-9090
MADELINE ZOLA WILLIAMS
Midwife
18035 BROOKHURST ST., STE. 2100
FOUNTAIN VALLEY, CA 92708
Orange County (657) 241-9090
JOSE LUIS ARANEZ M.D.
Internal Medicine (Gastroenterology)
18035 BROOKHURST ST., STE. 2100
FOUNTAIN VALLEY, CA 92708
Orange County (657) 241-9090

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 Zelner's NPI number?

The NPI number for Richard Zelner is 1235274259. It was assigned to this individual provider in the NPPES registry on February 20, 2007.

Where is Richard Zelner located?

Richard Zelner practices at 18035 Brookhurst St., Ste. 2100, Fountain Valley, CA 92708. The listed phone number is (657) 241-9090.

What is Richard Zelner's specialty?

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

Is Richard Zelner enrolled in Medicare?

Yes. Richard Zelner is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Richard Zelner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Richard Zelner reassigns Medicare benefits to Memorialcare Medical Foundation (Fountain Valley, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Richard Zelner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Richard Zelner was last updated on January 11, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.