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

Xin Si, MD

Individual provider Internal Medicine Physician · NPI 1639581804

Xin Si, MD is a Pediatric Medicine in Palo Alto, California. Graduated from Baylor College of Medicine in 2014, 12 years ago. Practices with Lpch Medical Group Div of Lucile, a 337-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
12
Trained at
Baylor College of Medicine
Licensed in
CA
In the registry since
2014
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

725 Welch Rd
Palo Alto, CA 94304-1601
Phone: (650) 497-8000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pediatric Pulmonology Physician (primary) Taxonomy 2080P0214X · Licence A154969 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A154969 (CA)
Pediatrics Physician Taxonomy 208000000X · Licence A154969 (CA)

Record details

NPI number1639581804
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 22, 2014
Last updated in NPPESApril 27, 2024
Certification dateApril 27, 2024

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesPULMONARY DISEASE
Medical schoolBAYLOR COLLEGE OF MEDICINE
Graduated 2014 (12 years in practice)
Group practice Lpch Medical Group Div Of Lucile — 337 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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