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

William Sikov, MD

Individual provider Hematology (Internal Medicine) Physician · NPI 1811916661

William Sikov, MD is a Hematology/Oncology in Providence, Rhode Island. Graduated from Yale University School of Medicine in 1982, 44 years ago. Practices with Affinity Physicians LLC, a 734-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
44
Trained at
Yale University School of Medicine
Licensed in
RI
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

1 Blackstone Street 2nd Fl
Providence, RI 02903-0290
Phone: (401) 453-7520
Show map & directions

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

Additional practice locations (1)

  • 101 Dudley St, Providence, RI 02905-2401 — (401) 274-1100

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence MD7581 (RI)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence MD7581 (RI)
Medical Oncology Physician Taxonomy 207RX0202X · Licence MD7581 (RI)

Record details

NPI number1811916661
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 19, 2006
Last updated in NPPESJune 16, 2021
Certification dateMarch 31, 2021
Mailing address101 Dudley St, Providence, RI 02905-2401

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolYALE UNIVERSITY SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Affinity Physicians Llc. — 734 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Providence