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WYNNSHANG C. SUN APC
NPI 1245426519
Internal Medicine - Pulmonary Disease in La Jolla, CA

Active since September 20, 2007
9850 GENESEE AVE STE 870, LA JOLLA, CA 92037(858) 452-7040(858) 452-7137 Get Directions Write a Review

NPPES record last updated: September 20, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Wynnshang C. Sun Apc NPPES

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

WYNNSHANG C. SUN APC (NPI 1245426519) is a healthcare organization registered as a pulmonary disease in La Jolla, California and active in the NPI registry since September 2007. The organization lists Wynnshang Chen Sun, Physician, as its authorized official.

NPPES Registry Identity

NPI1245426519
Entity TypeOrganization
Primary Taxonomy207RP1001X
Legal Business NameWYNNSHANG C. SUN APC
Location Address9850 GENESEE AVE STE 870La Jolla, CA 92037-1233
Mailing Address9850 Genesee Ave Ste 870La Jolla, CA 92037-1233 · (858) 452-7040 · Fax (858) 452-7137
Phone(858) 452-7040
Fax(858) 452-7137
Organization SubpartNo
Authorized OfficialWynnshang Chen SunPhysician · (858) 452-7040
Enumeration DateSeptember 20, 2007
✔ NPI 1245426519 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
9850 GENESEE AVE STE 870, La Jolla, CA 92037
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Other Identifiers 1

Medicare PING90026CA

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Wynnshang C. Sun Apc 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 Wynnshang C. Sun Apc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Wynnshang Sun, MD
Internal Medicine
NPI 1801806732
9850 GENESEE AVE STE 870
La Jolla, CA 92037
(858) 452-7040
✔ PECOS✔ Accepts Medicare0.2 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 Wynnshang C. Sun Apc's NPI number?

The NPI number for Wynnshang C. Sun Apc is 1245426519. It was assigned to this organization in the NPPES registry on September 20, 2007.

Where is Wynnshang C. Sun Apc located?

Wynnshang C. Sun Apc is located at 9850 Genesee Ave Ste 870, La Jolla, CA 92037. The listed phone number is (858) 452-7040.

What is Wynnshang C. Sun Apc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Wynnshang C. Sun Apc enrolled in Medicare?

Yes. Wynnshang C. Sun Apc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Wynnshang C. Sun Apc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Wynnshang C. Sun Apc. 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 Wynnshang C. Sun Apc was last updated on September 20, 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.