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

Summaiya Muhammad, MD

Individual provider Internal Medicine Physician · NPI 1841454535

Summaiya Muhammad, MD is an Internal Medicine in Castro Valley, California. Qualified in 2002, 24 years ago. Practices with Sutter Bay Medical Foundation, a 3,762-clinician group and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
24
Licensed in
CA, IL
In the registry since
2008
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

20103 Lake Chabot Rd
Castro Valley, CA 94546-5305
Phone: (510) 727-3256
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence A117252 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 125052361 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence A117252 (CA)

Record details

NPI number1841454535
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 11, 2008
Last updated in NPPESMay 9, 2017
Mailing address3687 Mt Diablo Blvd, Suite 200, Lafayette, CA 94549-3717

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice Sutter Bay Medical Foundation — 3762 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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