Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Michael Lewis, MD

Individual provider Internal Medicine Physician · NPI 1700826740

Michael Lewis, MD is a Family Practice in Concord, California. Graduated from Northeastern Ohio University College of Medicine in 1987, 39 years ago. Practices with One Medical Group Inc, a 328-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
39
Trained at
Northeastern Ohio University College of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

2001 Diamond Blvd Ste C-100
Concord, CA 94520-5737
Phone: (888) 663-6331
Fax: (415) 252-7176
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1333 Powell St, Emeryville, CA 94608-2598 — (510) 225-1000

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G64666 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence G64666 (CA)

Record details

NPI number1700826740
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESMarch 17, 2025
Certification dateMarch 17, 2025
Mailing address130 Sutter St Fl 2, San Francisco, CA 94104-4009

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolNORTHEASTERN OHIO UNIVERSITY COLLEGE OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice One Medical Group Inc — 328 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Concord