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ISLAND MEDICAL GROUP A MEDICAL CORPORATION
NPI 1750474045
Internal Medicine - Nephrology in Alameda, CA

Active since October 02, 2006
2070 CLINTON AVE FL 4, ALAMEDA, CA 94501(510) 748-0931(510) 748-8110 Get Directions Write a Review

NPPES record last updated: July 30, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 30, 2021, Mar 22, 2018 (2 updates tracked since 2018).

About Island Medical Group A Medical Corporation NPPES

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

ISLAND MEDICAL GROUP A MEDICAL CORPORATION (NPI 1750474045) is a healthcare organization registered as a nephrology in Alameda, California and active in the NPI registry since October 2006. The organization lists Alka Sharma, Md / Owner, as its authorized official.

NPPES Registry Identity

NPI1750474045
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NameISLAND MEDICAL GROUP A MEDICAL CORPORATION
Location Address2070 CLINTON AVE FL 4Alameda, CA 94501-4320
Mailing AddressPo Box 1099Alameda, CA 94501-0499 · (510) 748-0931 · Fax (510) 748-8110
Phone(510) 748-0931
Fax(510) 748-8110
Organization SubpartNo
Authorized OfficialAlka SharmaMd / Owner · (510) 748-0931
Enumeration DateOctober 2, 2006
Last NPPES UpdateJuly 30, 20212 updates tracked since enumeration
NPPES CertifiedJuly 30, 2021
✔ NPI 1750474045 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · A48009
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
2070 CLINTON AVE FL 4, Alameda, CA 94501
Open in Google Maps ↗

Other Identifiers 1

Medicaid00A480090CA

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-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)

Island Medical Group A 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 Island Medical Group A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Alka Sharma, M.D.
Internal Medicine
NPI 1275737561
2070 CLINTON AVE FL 4
Alameda, CA 94501
(510) 748-0931
✔ PECOSSame 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 Island Medical Group A Medical Corporation's NPI number?

The NPI number for Island Medical Group A Medical Corporation is 1750474045. It was assigned to this organization in the NPPES registry on October 2, 2006.

Where is Island Medical Group A Medical Corporation located?

Island Medical Group A Medical Corporation is located at 2070 Clinton Ave Fl 4, Alameda, CA 94501. The listed phone number is (510) 748-0931.

What is Island Medical Group A Medical Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Island Medical Group A Medical Corporation enrolled in Medicare?

Yes. Island Medical Group A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Island Medical Group A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Island Medical Group A 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 Island Medical Group A Medical Corporation was last updated on July 30, 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.