Doctor profile · Federal record
Dr. Stephanie Sinayuk, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Worcester, MA
- NPI 1588959456
- Accepts Medicare
- 15 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
55 Lake Ave N
Worcester, MA 016550002
(508) 334-1000 - Additional location
-
115 Lincoln St
Framingham, MA 017026358
(508) 383-1000
Credentials & registration
- NPI registered
- June 2011 — 15 yrs on file
- Profile last updated
- January 7, 2026
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Massachusetts #249310
- Medicaid
- MA #110099556A
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588959456. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
197
Distinct HCPCS
4
Medicare allowed
$33,775
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 102 | 100 | $183 | |
99284 |
Emergency department visit with moderate level of medical decision making | 57 | 56 | $126 | |
99291 |
Critical care, first 30-74 minutes | 23 | 23 | $224 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 15 | 15 | $184 |
In context: peer comparison
Among 82 peers in Worcester Emergency Medicine Physician, average services per provider: 70. This provider delivers 2.8× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Stephanie Sinayuk's medical specialty?
Dr. Stephanie Sinayuk practices Emergency Medicine Physician in Worcester, MA.
Where does Dr. Stephanie Sinayuk practice?
Dr. Stephanie Sinayuk practices at 55 Lake Ave N, Worcester, MA 016550002. Office phone: 5083341000.
What is Dr. Stephanie Sinayuk's NPI?
Dr. Stephanie Sinayuk's National Provider Identifier (NPI) is 1588959456, issued by NPPES.
Does Dr. Stephanie Sinayuk accept Medicare assignment?
Yes. Dr. Stephanie Sinayuk accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephanie Sinayuk commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.