Doctor profile · Federal record
Dr. Cassidy Dahn, MD
Critical Care Medicine (Internal Medicine) Physician (CMS: Critical Care (Intensivists)) · Emergency Medicine Physician · New York, NY
- NPI 1376809657
- Accepts Medicare
- MIPS 100.0 / 100 · 2023
- 14 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
550 1St Ave
New York, NY 100166402
(212) 263-3293 - Additional location
-
111 E 210Th St
Bronx, NY 104672401
(718) 920-4321
Credentials & registration
- NPI registered
- April 2012 — 14 yrs on file
- Profile last updated
- May 19, 2025
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207RC0200X — NUCC code
- State license (1)
- New York #288091
- Medicaid
- NY #CDAHN1986
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1376809657. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
160
Distinct HCPCS
4
Medicare allowed
$33,163
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99291 |
Critical care, first 30-74 minutes | 91 | 46 | $245 | |
99285 |
Emergency department visit with high level of medical decision making | 32 | 32 | $203 | |
99284 |
Emergency department visit with moderate level of medical decision making | 26 | 26 | $133 | |
99283 |
Emergency department visit with low level of medical decision making | 11 | 11 | $83 |
In context: peer comparison
Among 45 peers in New York Critical Care Medicine (Internal Medicine) Physician, average services per provider: 82. This provider delivers 2.0× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Cassidy Dahn's medical specialty?
Dr. Cassidy Dahn practices Critical Care Medicine (Internal Medicine) Physician in New York, NY.
Where does Dr. Cassidy Dahn practice?
Dr. Cassidy Dahn practices at 550 1St Ave, New York, NY 100166402. Office phone: 2122633293.
What is Dr. Cassidy Dahn's NPI?
Dr. Cassidy Dahn's National Provider Identifier (NPI) is 1376809657, issued by NPPES.
Does Dr. Cassidy Dahn accept Medicare assignment?
Yes. Dr. Cassidy Dahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Cassidy Dahn commonly perform?
Top Medicare-reported procedures in 2023: Critical care (HCPCS 99291); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.