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

James Melvin Long, MD

Individual provider Hematology & Oncology Physician · NPI 1194821868

James Melvin Long, MD is a Hematology/Oncology in Vacaville, California. Graduated from University of Texas Medical Branch at Galveston in 1984, 42 years ago. Practices with Northbay Physicians Surgery Center, LLC, a 337-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
42
Trained at
University of Texas Medical Branch at Galveston
Licensed in
CA
In the registry since
2006
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

1020 Nut Tree Rd Ste 390
Vacaville, CA 95687-4100
Phone: (707) 624-8000
Fax: (707) 624-8001
Show map & directions

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

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence C50016 (CA)

Record details

NPI number1194821868
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 16, 2006
Last updated in NPPESDecember 21, 2023
Certification dateDecember 21, 2023
Mailing address1200 B Gale Wilson Blvd, Fairfield, CA 94533-3552

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS MEDICAL BRANCH AT GALVESTON
Graduated 1984 (42 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 locations4 on file with Medicare

Other providers in Vacaville