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MEDICINE AND NEPHROLOGY ASSOCIATES
NPI 1114151958
Internal Medicine - Nephrology in Los Alamitos, CA

Active since May 07, 2009CLIA 05D0869530 · Waiver
10941 BLOOMFIELD ST STE A, LOS ALAMITOS, CA 90720(562) 596-1667(562) 596-7514 Get Directions Write a Review

NPPES record last updated: October 28, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Medicine And Nephrology Associates NPPES

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

MEDICINE AND NEPHROLOGY ASSOCIATES (NPI 1114151958) is a healthcare organization registered as a nephrology in Los Alamitos, California and active in the NPI registry since May 2009. The organization holds a CLIA Waiver certificate valid through June 15, 2028, maintains 2 additional practice locations, and lists Jack Rubin, Partner, as its authorized official.

NPPES Registry Identity

NPI1114151958
Entity TypeOrganization
Primary Taxonomy207RN0300X
Legal Business NameMEDICINE AND NEPHROLOGY ASSOCIATES
Location Address10941 BLOOMFIELD ST STE ALos Alamitos, CA 90720-6702
Mailing Address10941 Bloomfield St Ste ALos Alamitos, CA 90720-6702 · (562) 596-1667 · Fax (562) 596-7514
Phone(562) 596-1667
Fax(562) 596-7514
Organization SubpartNo
Authorized OfficialJack RubinPartner · (562) 596-1667
Enumeration DateMay 7, 2009
Last NPPES UpdateOctober 28, 2025
NPPES CertifiedOctober 28, 2025
✔ NPI 1114151958 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
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.
10941 BLOOMFIELD ST STE A, Los Alamitos, CA 90720
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Secondary Practice Locations 2

Location 113132 Studebaker Rd Ste 9Norwalk, CA 90650-2575 · Phone (562) 596-1667
Location 21045 Atlantic Ave Ste 915Long Beach, CA 90813-3427 · Phone (562) 596-1667

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)

Medicine And Nephrology Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Medicine And Nephrology Associates, which bills Medicare for the services they deliver. Of these, 6 practice at this address. They are listed nearest first.

Clinicians, nearest first (6)

Yasemin Balin, MD
Internal Medicine
NPI 1972126696
10941 BLOOMFIELD ST STE A
Los Alamitos, CA 90720
(562) 596-1667
✔ PECOS✔ Accepts MedicareSame address
Heena Contractor, M.D.
Nephrology
NPI 1518954973
10941 BLOOMFIELD ST #A
Los Alamitos, CA 90720
(562) 596-1667
✔ PECOS✔ Accepts MedicareSame address
Sheida Kashani, D.O.
Internal Medicine
NPI 1285752436
10941 BLOOMFIELD ST STE A
Los Alamitos, CA 90720
(562) 716-7466
✔ PECOS✔ Accepts MedicareSame address
Aaron Richler, M.D.
Internal Medicine
NPI 1619350337
10941 BLOOMFIELD ST
Los Alamitos, CA 90720
(562) 596-1667
✔ PECOS✔ Accepts MedicareSame address
Jack Rubin, M.D.
Nephrology
NPI 1700882479
10941 BLOOMFIELD ST SUITE A
Los Alamitos, CA 90720
(562) 596-1667
✔ PECOS✔ Accepts MedicareSame address
Woosuk Kim
Nurse Practitioner
NPI 1194465922
10941 BLOOMFIELD ST STE A
Los Alamitos, CA 90720
(562) 596-1662
✔ 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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D0869530

Medical And Nephrology Associates · Los Alamitos, CA
Active · expires Jun 15, 2028
CLIA Number05D0869530
Laboratory TypePhysician Office
Certificate Effective DateJune 16, 2026
Certificate Expiration DateJune 15, 2028
Laboratory DirectorJack Rubin MD
Laboratory Phone(562) 596-1667
Laboratory LocationMedical And Nephrology Associates10941 Bloomfield St Ste A, Los Alamitos, CA 90720
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

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 Medicine And Nephrology Associates's NPI number?

The NPI number for Medicine And Nephrology Associates is 1114151958. It was assigned to this organization in the NPPES registry on May 7, 2009.

Where is Medicine And Nephrology Associates located?

Medicine And Nephrology Associates is located at 10941 Bloomfield St Ste A, Los Alamitos, CA 90720. The listed phone number is (562) 596-1667.

What is Medicine And Nephrology Associates's specialty?

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

Is Medicine And Nephrology Associates enrolled in Medicare?

Yes. Medicine And Nephrology Associates is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Medicine And Nephrology Associates?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 3 Medicare specialties reassign their Medicare billing to Medicine And Nephrology Associates. 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. The largest specialties are Internal Medicine (3), Nephrology (2) and Nurse Practitioner (1). Of these, 6 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Medicine And Nephrology Associates hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0869530) is associated with this NPI, valid through June 15, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Medicine And Nephrology Associates was last updated on October 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.