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KARL SUN, M.D. INC.
NPI 1801258843
Internal Medicine - Cardiovascular Disease in San Diego, CA

Active since March 28, 2016
5555 RESERVOIR DRIVE, SUITE 112, SAN DIEGO, CA 92120(619) 287-7060(619) 287-7078 Get Directions Write a Review

NPPES record last updated: March 28, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Karl Sun, M.d. Inc. NPPES

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

KARL SUN, M.D. INC. (NPI 1801258843) is a healthcare organization registered as a cardiovascular disease in San Diego, California and active in the NPI registry since March 2016. The organization lists Karl Sun, Physician/owner, as its authorized official.

NPPES Registry Identity

NPI1801258843
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameKARL SUN, M.D. INC.
Location Address5555 RESERVOIR DRIVE, SUITE 112San Diego, CA 92120
Mailing Address5555 Reservoir Drive, Suite 112San Diego, CA 92120 · (619) 287-7060 · Fax (619) 287-7078
Phone(619) 287-7060
Fax(619) 287-7078
Organization SubpartNo
Authorized OfficialKarl SunPhysician/owner · (619) 287-7060
Enumeration DateMarch 28, 2016
✔ NPI 1801258843 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · A68612
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedNuclear Medicine · Nuclear CardiologyTaxonomy 207UN0901X · License A68612 (CA)
5555 RESERVOIR DRIVE, San Diego, CA 92120
Open in Google Maps ↗

Other Identifiers 3

Medicare PINWA68612ACA
Medicaid00A686120CA
Medicare UPINH01889CA

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Karl Sun, M.d. Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Karl Sun, M.D. Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Karl Sun, MD
Cardiovascular Disease (Cardiology)
NPI 1235131061
8851 CENTER DR STE 401
La Mesa, CA 91942
(619) 668-1550
✔ PECOS✔ Accepts Medicare2.9 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 Karl Sun, M.D. Inc.'s NPI number?

The NPI number for Karl Sun, M.D. Inc. is 1801258843. It was assigned to this organization in the NPPES registry on March 28, 2016.

Where is Karl Sun, M.D. Inc. located?

Karl Sun, M.D. Inc. is located at 5555 Reservoir Drive Suite 112, San Diego, CA 92120. The listed phone number is (619) 287-7060.

What is Karl Sun, M.D. Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Karl Sun, M.D. Inc. enrolled in Medicare?

Yes. Karl Sun, M.D. Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Karl Sun, M.D. Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Cardiovascular Disease (Cardiology)) reassigns their Medicare billing to Karl Sun, M.D. Inc.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Karl Sun, M.D. Inc. was last updated on March 28, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.