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

Michelle Sit, MD

Individual provider Rheumatology Physician · NPI 1740269513

Michelle Sit, MD is a Rheumatology in Vacaville, California. Qualified in 2003, 23 years ago. Practices with Northbay Physicians Surgery Center, LLC, a 337-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California and Virginia.

Years since qualifying
23
Licensed in
CA, VA
In the registry since
2006
Specialties on file
3
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

1010 Nut Tree Rd Ste 100A
Vacaville, CA 95687-4172
Phone: (707) 624-8532
Fax: (707) 624-8501
Show map & directions

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

Specialties & licences

Rheumatology Physician (primary) Taxonomy 207RR0500X · Licence 0101238150 (VA)
Rheumatology Physician Taxonomy 207RR0500X · Licence C-188321 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0101238150 (VA)

Record details

NPI number1740269513
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 11, 2006
Last updated in NPPESJanuary 7, 2026
Certification dateJanuary 7, 2026
Mailing address1010 Nut Tree Rd Ste 100a, Vacaville, CA 95687-4172

Medicare enrollment

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

Medicare specialtyRHEUMATOLOGY
Medical schoolOTHER
Graduated 2003 (23 years in practice)
Group practice Northbay Physicians Surgery Center, Llc — 337 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Vacaville