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EDMUND YAO MD INC
NPI 1285969139
Internal Medicine in Stockton, CA

Active since October 10, 2009
3031 W MARCH LN STE 101, STOCKTON, CA 95219(209) 472-7100(209) 472-7108 Get Directions Write a Review

NPPES record last updated: December 30, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Edmund Yao Md Inc NPPES

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

EDMUND YAO MD INC (NPI 1285969139) is a healthcare organization registered as an internal medicine in Stockton, California and active in the NPI registry since October 2009. The organization lists Edmund C Yao, President, as its authorized official.

NPPES Registry Identity

NPI1285969139
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameEDMUND YAO MD INC
Location Address3031 W MARCH LN STE 101Stockton, CA 95219-6568
Mailing AddressPo Box 691957Stockton, CA 95269-1957 · (209) 662-0224
Phone(209) 472-7100
Fax(209) 472-7108
Organization SubpartNo
Authorized OfficialEdmund C YaoPresident · (209) 662-0224
Enumeration DateOctober 10, 2009
Last NPPES UpdateDecember 30, 2019
✔ NPI 1285969139 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 · A84312
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.
3031 W MARCH LN STE 101, Stockton, CA 95219
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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)

Edmund Yao Md Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Revalidation Due Date

Revalidation due by March 31, 2027

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 IDO20100421000155Non-DME Part B · Clinic/Group PracticeDue dateMarch 31, 2027
Source: CMS Revalidation Due Date List, October 2026 release.

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Edmund Yao MD Inc, which bills Medicare for the services this clinician delivers.

Clinician (1)

Edmund Yao, M.D.
Internal Medicine
NPI 1245328004
3031 W MARCH LN STE 101
Stockton, CA 95219
(209) 472-7100
✔ PECOS✔ Accepts MedicareSame address

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 Edmund Yao MD Inc's NPI number?

The NPI number for Edmund Yao MD Inc is 1285969139. It was assigned to this organization in the NPPES registry on October 10, 2009.

Where is Edmund Yao MD Inc located?

Edmund Yao MD Inc is located at 3031 W March Ln Ste 101, Stockton, CA 95219. The listed phone number is (209) 472-7100.

What is Edmund Yao MD Inc's specialty?

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

Is Edmund Yao MD Inc enrolled in Medicare?

Yes. Edmund Yao MD Inc is registered in the Medicare PECOS enrollment system.

When is Edmund Yao 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 March 31, 2027. 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 Edmund Yao MD Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Edmund Yao MD 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 Edmund Yao MD Inc was last updated on December 30, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.