1. Home
  2. Directory
  3. California
  4. San Ramon
  5. Internal Medicine
  6. NPI Profile

MICHAEL T. TEMKIN DO, A MEDICAL CORPORATION
NPI 1558323394
Internal Medicine in San Ramon, CA

Active since April 05, 2006
1081 MARKET PL, #300, SAN RAMON, CA 94583(925) 866-3900(925) 866-3901 Get Directions Write a Review

NPPES record last updated: August 22, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Michael T. Temkin Do, A Medical Corporation NPPES

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

MICHAEL T. TEMKIN DO, A MEDICAL CORPORATION (NPI 1558323394) is a healthcare organization registered as an internal medicine in San Ramon, California and active in the NPI registry since April 2006. The organization lists Michael T Temkin, Owner/physician, as its authorized official.

NPPES Registry Identity

NPI1558323394
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameMICHAEL T. TEMKIN DO, A MEDICAL CORPORATION
Location Address1081 MARKET PL, #300San Ramon, CA 94583-4773
Mailing Address1081 Market Pl, #300San Ramon, CA 94583-4773 · (925) 866-3900 · Fax (925) 866-3901
Phone(925) 866-3900
Fax(925) 866-3901
Organization SubpartNo
Authorized OfficialMichael T TemkinOwner/physician · (925) 866-3900
Enumeration DateApril 5, 2006
Last NPPES UpdateAugust 22, 2020
✔ NPI 1558323394 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 · 20A6924
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.
1081 MARKET PL, San Ramon, CA 94583
Open in Google Maps ↗

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)

Michael T. Temkin Do, 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 Michael T. Temkin Do, A Medical Corporation, which bills Medicare for the services this clinician delivers.

Clinician (1)

Michael Temkin, D.O.
Internal Medicine
NPI 1194787929
1081 MARKET PL #300
San Ramon, CA 94583
(925) 866-3900
✔ PECOSSame 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 for Provider-Performed Microscopy Procedures (PPMP) 05D0972612

Michael Temkin, Do, A Medical Corporation · San Ramon, CA
Expired · Oct 26, 2026
CLIA Number05D0972612
Laboratory TypePhysician Office
Certificate Effective DateOctober 27, 2024
Certificate Expiration DateOctober 26, 2026
Laboratory DirectorMichael T. Temkin, Do
Laboratory Phone(925) 866-3900
Laboratory LocationMichael Temkin, Do, A Medical Corporation1081 Market Place, Suite 300, San Ramon, CA 94583
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform 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 Michael T. Temkin Do, A Medical Corporation's NPI number?

The NPI number for Michael T. Temkin Do, A Medical Corporation is 1558323394. It was assigned to this organization in the NPPES registry on April 5, 2006.

Where is Michael T. Temkin Do, A Medical Corporation located?

Michael T. Temkin Do, A Medical Corporation is located at 1081 Market Pl #300, San Ramon, CA 94583. The listed phone number is (925) 866-3900.

What is Michael T. Temkin Do, A Medical Corporation's specialty?

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

Is Michael T. Temkin Do, A Medical Corporation enrolled in Medicare?

Yes. Michael T. Temkin Do, A Medical Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Michael T. Temkin Do, A Medical Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Michael T. Temkin Do, 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 Michael T. Temkin Do, A Medical Corporation was last updated on August 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.