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HEE YONG OH MD INC
NPI 1457636094
Internal Medicine in West Covina, CA

Active since October 14, 2011
1433 W MERCED AVE STE 207, WEST COVINA, CA 91790(626) 962-2421 Get Directions Write a Review

NPPES record last updated: December 16, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Hee Yong Oh Md Inc NPPES

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

HEE YONG OH MD INC (NPI 1457636094) is a healthcare organization registered as an internal medicine in West Covina, California and active in the NPI registry since October 2011. The organization lists Hee Yong Oh, Owner, as its authorized official.

NPPES Registry Identity

NPI1457636094
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameHEE YONG OH MD INC
Location Address1433 W MERCED AVE STE 207West Covina, CA 91790-3402
Mailing Address1433 W Merced Ave Ste 207West Covina, CA 91790-3402
Phone(626) 962-2421
Organization SubpartNo
Authorized OfficialHee Yong OhOwner · (626) 962-2421
Enumeration DateOctober 14, 2011
Last NPPES UpdateDecember 16, 2011
✔ NPI 1457636094 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 · FN230A
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.
1433 W MERCED AVE STE 207, West Covina, CA 91790
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Other Identifiers 5

Medicare PINFN230ACA
Medicare PINA34352CA
Medicaid00FN230A0CA
Medicaid00A343520CA
Medicare UPINE01617CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Hee Yong Oh Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by December 31, 2026

Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.

StateEnrollment IDDue date
StateCaliforniaEnrollment IDO20111102000712Non-DME Part B · Clinic/Group PracticeDue dateDecember 31, 2026
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

2

Medicare enrollment records show 2 clinicians reassign Medicare billing to Hee Yong Oh MD Inc, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Hee Oh, M.D.
Internal Medicine
NPI 1225106693
1433 W MERCED AVE STE 207
West Covina, CA 91790
(626) 962-2421
✔ PECOS✔ Accepts MedicareSame address
Jiman Jung, NP
Nurse Practitioner
NPI 1093082885
20627 GOLDEN SPRINGS DR STE 2D&E
Diamond Bar, CA 91789
(909) 480-0099
✔ PECOS✔ Accepts Medicare7.0 mi

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

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 Hee Yong Oh MD Inc's NPI number?

The NPI number for Hee Yong Oh MD Inc is 1457636094. It was assigned to this organization in the NPPES registry on October 14, 2011.

Where is Hee Yong Oh MD Inc located?

Hee Yong Oh MD Inc is located at 1433 W Merced Ave Ste 207, West Covina, CA 91790. The listed phone number is (626) 962-2421.

What is Hee Yong Oh MD Inc's specialty?

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

Is Hee Yong Oh MD Inc enrolled in Medicare?

Yes. Hee Yong Oh MD Inc is registered in the Medicare PECOS enrollment system.

When is Hee Yong Oh MD Inc's Medicare revalidation due?

According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (California, Clinic/Group Practice) is due for revalidation by December 31, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.

How many clinicians bill Medicare through Hee Yong Oh MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians reassign their Medicare billing to Hee Yong Oh MD Inc, in Internal Medicine and Nurse Practitioner. A 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 the clinician's services. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Hee Yong Oh MD Inc was last updated on December 16, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.