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GREGORY A ROBERTSON MD A PROFESSIONAL MEDICAL CORPORATION
NPI 1417197443
Internal Medicine in Newport Beach, CA

Active since March 04, 2009
20311 SW ACACIA ST, STE 100, NEWPORT BEACH, CA 92660(949) 891-1441(949) 878-4845 Get Directions Write a Review

NPPES record last updated: July 12, 2016. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Gregory A Robertson Md A Professional Medical Corporation NPPES

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

GREGORY A ROBERTSON MD A PROFESSIONAL MEDICAL CORPORATION (NPI 1417197443) is a healthcare organization registered as an internal medicine in Newport Beach, California and active in the NPI registry since March 2009. The organization lists Gregory A Robertson, Ceo, as its authorized official.

NPPES Registry Identity

NPI1417197443
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGREGORY A ROBERTSON MD A PROFESSIONAL MEDICAL CORPORATION
Location Address20311 SW ACACIA ST, STE 100Newport Beach, CA 92660-1733
Mailing Address20311 Sw Acacia St, Ste 100Newport Beach, CA 92660-1733 · (949) 891-1441 · Fax (949) 878-4845
Phone(949) 891-1441
Fax(949) 878-4845
Organization SubpartNo
Authorized OfficialGregory A RobertsonCeo · (949) 891-1441
Enumeration DateMarch 4, 2009
Last NPPES UpdateJuly 12, 2016
✔ NPI 1417197443 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 · G50555
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.
20311 SW ACACIA ST, Newport Beach, CA 92660
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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)

Gregory A Robertson Md A Professional Medical Corporation 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 Gregory A Robertson MD A Professional Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Gregory Robertson, M.D.
Internal Medicine
NPI 1932281011
20311 SW ACACIA ST STE 100
Newport Beach, CA 92660
(949) 250-4244
✔ 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 Gregory A Robertson MD A Professional Medical Corporation's NPI number?

The NPI number for Gregory A Robertson MD A Professional Medical Corporation is 1417197443. It was assigned to this organization in the NPPES registry on March 4, 2009.

Where is Gregory A Robertson MD A Professional Medical Corporation located?

Gregory A Robertson MD A Professional Medical Corporation is located at 20311 SW Acacia St Ste 100, Newport Beach, CA 92660. The listed phone number is (949) 891-1441.

What is Gregory A Robertson MD A Professional Medical Corporation's specialty?

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

Is Gregory A Robertson MD A Professional Medical Corporation enrolled in Medicare?

Yes. Gregory A Robertson MD A Professional Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gregory A Robertson MD A Professional Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Gregory A Robertson MD A Professional Medical Corporation. 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 Gregory A Robertson MD A Professional Medical Corporation was last updated on July 12, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.