ACN MEDICAL GROUP INC
NPI 1154747020
Internal Medicine in Millbrae, CA

Q: What is Acn Medical Group Inc's NPI number?

The NPI number for Acn Medical Group Inc is 1154747020. It was assigned to this organization in the NPPES registry on March 14, 2014.

Q: What is Acn Medical Group Inc's specialty?

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

Active since March 14, 2014

423 BROADWAY, SUITE 604, MILLBRAE, CA 94030(650) 732-9721(510) 323-4286 Get Directions Write a Review

NPPES record last updated: July 25, 2014. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Acn Medical Group Inc NPPES

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

ACN MEDICAL GROUP INC (NPI 1154747020) is a healthcare organization registered as an internal medicine in Millbrae, California and active in the NPI registry since March 2014. The organization lists Andrew Ng, Owner, as its authorized official.

NPPES Registry Identity

NPI1154747020

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameACN MEDICAL GROUP INC

Location Address423 BROADWAY, SUITE 604Millbrae, CA 94030-1905

Mailing Address423 Broadway, Suite 604Millbrae, CA 94030-1905 · (650) 732-9721 · Fax (510) 323-4286

Phone(650) 732-9721

Fax(510) 323-4286

Organization SubpartNo

Authorized OfficialAndrew NgOwner · (650) 732-9721

Enumeration DateMarch 14, 2014

Last NPPES UpdateJuly 25, 2014

✔ NPI 1154747020 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 · A107327

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.

423 BROADWAY, Millbrae, CA 94030

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 3 clinicians reassign Medicare billing to Acn 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)

Andrew Ng, MD

Internal Medicine

NPI 1871716910

423 BROADWAY SUITE 604
Millbrae, CA 94030

(650) 732-9721

✔ PECOS✔ Accepts MedicareSame address

Melissa Frederick, M.D.

Internal Medicine

NPI 1033238076

423 BROADWAY SUITE 604
Millbrae, CA 94030

(650) 732-9721

✔ PECOS✔ Accepts MedicareSame address

Teklehaimanot Abraha, DNP

Nurse Practitioner

NPI 1013441229

423 BROADWAY SUITE #604
Millbrae, CA 94030

(415) 619-4719

✔ 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 Acn Medical Group Inc's NPI number?

The NPI number for Acn Medical Group Inc is 1154747020. It was assigned to this organization in the NPPES registry on March 14, 2014.

Where is Acn Medical Group Inc located?

Acn Medical Group Inc is located at 423 Broadway Suite 604, Millbrae, CA 94030. The listed phone number is (650) 732-9721.

What is Acn Medical Group Inc's specialty?

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

Is Acn Medical Group Inc enrolled in Medicare?

Yes. Acn Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Acn Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Acn Medical Group Inc, in Internal Medicine and Nurse Practitioner. 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 Acn Medical Group Inc was last updated on July 25, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.