Doctor profile · Federal record

Dr. William Tsiaras, M.D.

Ophthalmology Physician (CMS: Ophthalmology) · Providence, RI

  • NPI 1376609180
  • Accepts Medicare
  • MIPS 75.0 / 100 · 2023
  • 51 yrs in practice
  • Male
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
78 Baker St
Providence, RI 029054417
(401) 831-4592
fax (401) 831-4643

Credentials & registration

NPPES · NUCC
NPI registered
December 2006 — 20 yrs on file
Profile last updated
July 18, 2016
Year of graduation
1975 — 51 yrs since
Specialty taxonomy
207W00000X — NUCC code
State license (1)
Rhode Island #4952
Medicaid
RI #9000834

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1376609180. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
1,305
Distinct HCPCS
6
Medicare allowed
$127,464
HCPCS Description Services Patients Avg allowed
92014 Established patient complete exam of visual system 795 555 $129
92134 Imaging of retina 333 238 $41
92133 Imaging of optic nerve 104 98 $38
92012 Established patient problem focused exam of visual system 39 33 $92
92004 New patient complete exam of visual system 17 17 $153
92083 Exam of visual field with extended testing 17 17 $64

In context: peer comparison

Among 14 peers in Providence Ophthalmology Physician, average services per provider: 342. This provider delivers 3.8× the peer median.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$139
Transactions
6
Manufacturers
3
Payer (manufacturer) Industry Txns Amount
Abbvie INC. 3 $59.55
Alcon Vision LLC 2 $45.95
Oyster Point Pharma, INC. 1 $33.55

By nature of payment

Food and Beverage
$139

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
737
Patients
203
Total drug cost
$73,882
Drug Type Claims Patients Total cost
Latanoprost Generic 285 77 $7,874
Timolol Maleate Generic 133 40 $4,246
Lumigan (Bimatoprost) Brand 89 20 $34,564
Dorzolamide-Timolol (Dorzolamide Hcl/Timolol Maleat) Brand 48 11 $1,422
Brimonidine Tartrate Generic 44 11 $372
Prednisolone Acetate Generic 36 23 $1,287
Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) Brand 26 21 $305
Alphagan P (Brimonidine Tartrate) Brand 24 0 $13,052
Rocklatan (Netarsudil Mesylat/Latanoprost) Brand 19 0 $6,761
Travoprost Generic 19 0 $3,313

Frequently asked questions

Auto-generated from federal data
What is Dr. William Tsiaras's medical specialty?
Dr. William Tsiaras practices Ophthalmology Physician in Providence, RI.
Where does Dr. William Tsiaras practice?
Dr. William Tsiaras practices at 78 Baker St, Providence, RI 029054417. Office phone: 4018314592.
What is Dr. William Tsiaras's NPI?
Dr. William Tsiaras's National Provider Identifier (NPI) is 1376609180, issued by NPPES.
Does Dr. William Tsiaras accept Medicare assignment?
Yes. Dr. William Tsiaras accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Tsiaras commonly perform?
Top Medicare-reported procedures in 2023: Established patient complete exam of visual system (HCPCS 92014); Imaging of retina (HCPCS 92134); Imaging of optic nerve (HCPCS 92133). Source: CMS Medicare Physician & Other Practitioners file.