William Ellis Doak
Individual provider Active NPI Internal Medicine Physician · Providence, RI
NPI 1477243772 · NPPES record last updated Sep 4, 2026
Key facts
- NPI
- 1477243772
- Entity type
- Individual (NPI type 1)
- Primary specialty
- Internal Medicine Physician 207R00000X
- License
- MD21364 (RI)
- Practice address
- 593 Eddy St
Providence, RI 02903-4923 - Phone
- (401) 444-4741
- Fax
- (401) 444-4445
- NPI assigned
- May 10, 2023
- Sex
- Male
- Sole proprietor
- No
Organizations & group practices 1
Medicare Care Compare profile
- Specialty
- Internal Medicine
- Education
- Warren Alpert Medical School of Brown University, 2023
- Medicare assignment
- May accept Medicare assignment
Practice addresses (Care Compare)
15 Lasalle SQ
Providence, RI 02903
Medicare participation
- Medicare fee-for-service enrollment
- Enrolled in RI
- Eligible to order & refer
- Part B services: Yes · DME: Yes · Home health: Yes · Power mobility devices: Yes · Hospice: Yes
Medicare enrollment records
| Enrollment ID | State | Provider type | PAC ID | Details |
|---|---|---|---|---|
| I20230522001787 | RI | Order and Referring Only - Internal Medicine |
7719343524 |
National Provider Directory
- Medicare enrollment (NPD)
- Yes
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| LP0587 | RI | MD | Internal Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Lifespan Corporation | Current | Accepting new patients |
Interoperability endpoints
- wdoak189398@brownhealth.medalliesdirect.net
Specialties & licenses
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | MD21364 | RI | Yes |
Addresses
Primary practice location
593 Eddy St
Providence, RI 02903-4923
Mailing address
15 Lasalle Square
Providence, RI 02903-1814
Phone (401) 444-2369
Other practice location 1
245 Chapman St Ste 300
Providence, RI 02905-4539
Phone (401) 444-4741
Other providers in Providence, RI
- Beata Elzbieta Dizoglio
- Don S Dizon
- Kevin Djatcha
- Lisandra Dju
- Le Hanh Dung DO
- Kelvin Nam Doan
- Cody Doberstein
- Curtis Doberstein
- Linda Doberstein
- Laura Dobler
All providers in Providence, RI · Internal Medicine Physician in Rhode Island
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Record last updated by the provider on Sep 4, 2026. Information in NPPES is self-reported and not verified by CMS.
- NUCC Health Care Provider Taxonomy: specialty names.
- Medicare Fee-For-Service Public Provider Enrollment (CMS/PECOS): enrollments, PAC IDs and benefit reassignments.
- Order and Referring (CMS).
- Medicare Care Compare provider data (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.