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HAMILTON AVENUE MEDICAL GROUP, INC.
NPI 1871712737
Internal Medicine in San Jose, CA

Active since April 25, 2007
295 OCONNOR DR, SAN JOSE, CA 95128(408) 279-8171(408) 279-0412 Get Directions Write a Review

NPPES record last updated: July 22, 2015. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Hamilton Avenue Medical Group, Inc. NPPES

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

HAMILTON AVENUE MEDICAL GROUP, INC. (NPI 1871712737) is a healthcare organization registered as an internal medicine in San Jose, California and active in the NPI registry since April 2007. The organization lists Jean Luong, President, as its authorized official.

NPPES Registry Identity

NPI1871712737
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameHAMILTON AVENUE MEDICAL GROUP, INC.
Location Address295 OCONNOR DRSan Jose, CA 95128-1624
Mailing Address295 Oconnor DrSan Jose, CA 95128-1624 · (408) 279-8171 · Fax (408) 279-0412
Phone(408) 279-8171
Fax(408) 279-0412
Organization SubpartNo
Authorized OfficialJean LuongPresident · (408) 279-8171
Enumeration DateApril 25, 2007
Last NPPES UpdateJuly 22, 2015
✔ NPI 1871712737 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 · A48809
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.
295 OCONNOR DR, San Jose, CA 95128
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Other Identifiers 2

Medicare ID-Type UnspecifiedZZZ73614ZCA
MedicaidZZZ73614ZCA

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)

Hamilton Avenue Medical Group, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

3

Medicare enrollment records show 3 clinicians reassign Medicare billing to Hamilton Avenue Medical Group, Inc., which bills Medicare for the services they deliver. Of these, 3 practice at this address. They are listed nearest first.

Clinicians, nearest first (3)

David Cahn, MD
Family Practice
NPI 1689762205
295 OCONNOR DR
San Jose, CA 95128
(408) 279-0548
✔ PECOS✔ Accepts MedicareSame address
Jean Luong, M.D
Internal Medicine
NPI 1780615641
295 OCONNOR DR
San Jose, CA 95128
(408) 279-8171
✔ PECOS✔ Accepts MedicareSame address
Masha Nakelchik, M.D.
Internal Medicine
NPI 1255346623
295 OCONNOR DR
San Jose, CA 95128
(408) 279-8173
✔ 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 Hamilton Avenue Medical Group, Inc.'s NPI number?

The NPI number for Hamilton Avenue Medical Group, Inc. is 1871712737. It was assigned to this organization in the NPPES registry on April 25, 2007.

Where is Hamilton Avenue Medical Group, Inc. located?

Hamilton Avenue Medical Group, Inc. is located at 295 Oconnor Dr, San Jose, CA 95128. The listed phone number is (408) 279-8171.

What is Hamilton Avenue Medical Group, Inc.'s specialty?

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

Is Hamilton Avenue Medical Group, Inc. enrolled in Medicare?

Yes. Hamilton Avenue Medical Group, Inc. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Hamilton Avenue Medical Group, Inc.?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Hamilton Avenue Medical Group, Inc., in Family Practice and Internal Medicine. 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, 3 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Hamilton Avenue Medical Group, Inc. was last updated on July 22, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.