Michelle Sit, MD
Rheumatology Internal Medicine
Michelle Sit is a Rheumatology Internal Medicine specialist based in Vacaville, CA with over 23 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Michelle Sit, MD has been part of the Vacaville medical community since 2006 in group practice. With 23+ years of experience, she has been practicing in the Vacaville area. Rheumatologists treat autoimmune and inflammatory conditions including rheumatoid arthritis, lupus, psoriatic arthritis, and more.
Older · 137dNPPES updated 2026-01-07 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
1010 Nut Tree Rd Ste 100a, Vacaville, CA 95687-4172
$735 received from industry
7 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Michelle Sit's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Board certified · Jan 6, 2026
Self-reported via NPPES
23 years in practice
Experienced
Rheumatologists treat autoimmune and inflammatory conditions including rheumatoid arthritis, lupus, psoriatic arthritis, gout, osteoarthritis, and vasculitis. They manage biologic therapies and joint-preserving treatments.
Taxonomy: 207RR0500X
Primary hospital affiliation: Acute Care Hospitals
CMS Certification Number: 190145
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Michelle Sit
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Michelle Sit for follow-ups, medication reviews, and ongoing care — no travel to Vacaville required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Michelle Sit
Dr. Sit is listed as active in the NPI registry with telehealth listed in Vacaville, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (707) 624-8532.
Sourced from CMS NPPES · OIG LEIE · CMS Open Payments 2024. See Data Methodology.
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Contact Michelle Sit
Practice Location
1010 Nut Tree Rd Ste 100a, Vacaville, CA 95687-4172
Mailing Address
1010 Nut Tree Rd Ste 100a, Vacaville, CA 95687-4172
This is a provider directory. Contact the office directly to schedule appointments.
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