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SUNNY DAY MEDICINE, INC.
NPI 1639755275
Internal Medicine in Torrance, CA

Active since March 23, 2021
4201 TORRANCE BLVD #420, TORRANCE, CA 90503(626) 688-6852 Get Directions Write a Review

NPPES record last updated: July 29, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 29, 2021, Mar 23, 2021 (2 updates tracked since 2021).

About Sunny Day Medicine, Inc. NPPES

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

SUNNY DAY MEDICINE, INC. (NPI 1639755275) is a healthcare organization registered as an internal medicine in Torrance, California and active in the NPI registry since March 2021. The organization lists Victor Lin, Ceo, as its authorized official.

NPPES Registry Identity

NPI1639755275
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameSUNNY DAY MEDICINE, INC.
Location Address4201 TORRANCE BLVD #420Torrance, CA 90503
Mailing Address120 S Del Mar Ave Unit 2895San Gabriel, CA 91778-7214
Phone(626) 688-6852
Organization SubpartNo
Authorized OfficialVictor LinCeo · (626) 688-6852
Enumeration DateMarch 23, 2021
Last NPPES UpdateJuly 29, 20212 updates tracked since enumeration
NPPES CertifiedMarch 31, 2021
✔ NPI 1639755275 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.

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)

Sunny Day Medicine, 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 Sunny Day Medicine, Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

Victor Lin, DO
Internal Medicine
NPI 1134367204
1415 ROSS AVE
El Centro, CA 92243
(760) 339-7100
✔ PECOS✔ Accepts Medicare

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 Sunny Day Medicine, Inc.'s NPI number?

The NPI number for Sunny Day Medicine, Inc. is 1639755275. It was assigned to this organization in the NPPES registry on March 23, 2021.

Where is Sunny Day Medicine, Inc. located?

Sunny Day Medicine, Inc. is located at 4201 Torrance Blvd #420, Torrance, CA 90503. The listed phone number is (626) 688-6852.

What is Sunny Day Medicine, Inc.'s specialty?

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

Is Sunny Day Medicine, Inc. enrolled in Medicare?

Yes. Sunny Day Medicine, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Sunny Day Medicine, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Sunny Day Medicine, 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 Sunny Day Medicine, Inc. was last updated on July 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.