Doctor profile · Federal record
Dr. Mary Hahn, MD
Vascular Neurology Physician (CMS: Neurology) · Neurology Physician · Student in an Organized Health Care Education/Training Program · Neurology Physician · Stony Brook, NY
- NPI 1275021081
- Accepts Medicare
- MIPS 91.4 / 100 · 2023
- 3 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
Health Sciences Center T12-020
Stony Brook, NY 117940001
(631) 444-8118
Credentials & registration
- NPI registered
- April 2018 — 8 yrs on file
- Profile last updated
- July 11, 2023
- Year of graduation
- 2023 — 3 yrs since
- Specialty taxonomy
- 2084V0102X — NUCC code
- State licenses (2)
- New York #322453 · Illinois #036.160135
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1275021081. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
241
Distinct HCPCS
10
Medicare allowed
$28,700
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 49 | 49 | $148 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 41 | 41 | $98 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 37 | 24 | $58 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 35 | 28 | $91 | |
G0508 |
Telehealth consultation, critical care, initial , physicians typically spend 60 minutes communicating with the patient and providers via telehealth | 20 | 20 | $238 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 12 | 11 | $105 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 | $199 | |
99238 |
Hospital discharge day management, 30 minutes or less | 12 | 11 | $93 | |
99284 |
Emergency department visit with moderate level of medical decision making | 12 | 12 | $140 | |
99283 |
Emergency department visit with low level of medical decision making | 11 | 11 | $84 |
In context: peer comparison
Among 1 peers in Stony Brook Vascular Neurology Physician, average services per provider: 24. This provider delivers 10× the peer median.Frequently asked questions
What is Dr. Mary Hahn's medical specialty?
Dr. Mary Hahn practices Vascular Neurology Physician in Stony Brook, NY.
Where does Dr. Mary Hahn practice?
Dr. Mary Hahn practices at Health Sciences Center T12-020, Stony Brook, NY 117940001. Office phone: 6314448118.
What is Dr. Mary Hahn's NPI?
Dr. Mary Hahn's National Provider Identifier (NPI) is 1275021081, issued by NPPES.
Does Dr. Mary Hahn accept Medicare assignment?
Yes. Dr. Mary Hahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mary Hahn commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Initial hospital care with straightforward or low level of medical decision making (HCPCS 99221); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.