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MR. EDWARD UNGSEOK OH MD
NPI 1376284026
Internal Medicine in Fontana, CA

Active since April 06, 2022PECOS EnrolledAccepts Medicare Assignment
9961 SIERRA AVE, FONTANA, CA 92335(909) 427-5000 Get Directions Write a Review

NPPES record last updated: October 31, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mr. Edward Ungseok Oh Md NPPES

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

MR. EDWARD UNGSEOK OH MD (NPI 1376284026) is an individual internal medicine provider in Fontana, California, licensed in California (A203095) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2017).

NPPES Registry Identity

NPI1376284026
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMR. EDWARD UNGSEOK OHCredential: MD
Location Address9961 SIERRA AVEFontana, CA 92335-6720
Mailing Address9550 Escondido AveHesperia, CA 92345-9120 · (909) 409-2174
Phone(909) 427-5000
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateApril 6, 2022
Last NPPES UpdateOctober 31, 2025
NPPES CertifiedOctober 31, 2025
✔ NPI 1376284026 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A203095
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
9961 SIERRA AVE, Fontana, CA 92335
Open in Google Maps ↗

Secondary Practice Locations 2

Location 12295 S Vineyard AveOntario, CA 91761-7925 · Phone (883) 357-4227
Location 218300 CA-18, Kaiser HospitalistVictorville, CA 92307 · Phone (176) 024-2231

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Edward Ungseok Oh Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7719481993
PECOS Enrollment IDI20250919001902
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92335 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

SHEILA ANN VANALLEN PT
Physical Therapist
9961 SIERRA AVE, BUILDING 3A
FONTANA, CA 92335
San Bernardino County (909) 427-7727
MR. JAMES DAVID KILLEEN III M.D.
Pediatrics
9961 SIERRA AVE, KAISER PERMANENTE FONTANA - PEDIATRICS
FONTANA, CA 92335
San Bernardino County (909) 427-6960
MR. DHIRESH N PATEL RPH
Pharmacist
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 302-8018
MS. STELLA MARIS CARLOS R.D.
Dietitian, Registered
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 472-7185
KADETTE KELLY CRNA
Nurse Anesthetist, Certified Registered
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 427-3910
YAEL STEINFELD NP
Nurse Practitioner
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 427-3910
SCOTT SWARTZ NP
Nurse Practitioner
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 427-3910
ROBERT M. THEAL MD
Family Medicine
9961 SIERRA AVE
FONTANA, CA 92335
San Bernardino County (909) 427-3910

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 Edward Oh's NPI number?

The NPI number for Edward Oh is 1376284026. It was assigned to this individual provider in the NPPES registry on April 6, 2022.

Where is Edward Oh located?

Edward Oh practices at 9961 Sierra Ave, Fontana, CA 92335. The listed phone number is (909) 427-5000.

What is Edward Oh's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Edward Oh enrolled in Medicare?

Yes. Edward Oh is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Edward Oh was last updated on October 31, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.