Doctor profile · Federal record

Dr. Cleo Tsolakoglou-Williams, M.D

Family Medicine Physician · Pasadena, CA

  • NPI 1538243126
  • 20 yrs on file
  • Female
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
960 E Green St, 208
Pasadena, CA 911062401
(626) 577-4455
fax (626) 449-2759

Credentials & registration

NPPES · NUCC
NPI registered
October 2006 — 20 yrs on file
Profile last updated
July 9, 2007
Specialty taxonomy
207Q00000X — NUCC code
State license (1)
California #A52191
Medicaid
CA #00A521910

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1538243126. Last verified May 11, 2026.

Open Payments

Industry payments received

CMS Open Payments
All-time total
$522
Transactions
4
Manufacturers
3
Payer (manufacturer) Industry Txns Amount
Janssen Pharmaceuticals, Inc 2 $272.34
IDORSIA PHARMACEUTICALS US INC 1 $125.00
Vanda Pharmaceuticals Inc. 1 $124.98

By nature of payment

Food and Beverage
$522

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
616
Patients
161
Total drug cost
$57,414
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 87 32 $1,214
Levothyroxine Sodium Generic 77 28 $1,456
Carvedilol Generic 61 19 $837
Amlodipine Besylate Generic 60 20 $575
Rosuvastatin Calcium Generic 60 21 $1,639
Ozempic (Semaglutide) Brand 38 0 $47,861
Metformin Hcl Generic 37 16 $434
Lisinopril Generic 29 14 $442
Lisinopril-Hydrochlorothiazide (Lisinopril/Hydrochlorothiazide) Brand 29 11 $527
Pantoprazole Sodium Generic 25 0 $212

Frequently asked questions

Auto-generated from federal data
What is Dr. Cleo Tsolakoglou-Williams's medical specialty?
Dr. Cleo Tsolakoglou-Williams practices Family Medicine Physician in Pasadena, CA.
Where does Dr. Cleo Tsolakoglou-Williams practice?
Dr. Cleo Tsolakoglou-Williams practices at 960 E Green St, Pasadena, CA 911062401. Office phone: 6265774455.
What is Dr. Cleo Tsolakoglou-Williams's NPI?
Dr. Cleo Tsolakoglou-Williams's National Provider Identifier (NPI) is 1538243126, issued by NPPES.