Doctor profile · Federal record
Dr. David Hahn, MD
Neurology Physician (CMS: Neurology) · Neurology Physician · Neurology Physician · Neurology Physician · Greenwich, CT
- NPI 1053625459
- Accepts Medicare
- MIPS 89.1 / 100 · 2023
- 18 yrs in practice
- Licensed in 4 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
115 Mason St Ste 1
Greenwich, CT 068306630
(203) 276-4464
fax (203) 276-4468
Credentials & registration
- NPI registered
- July 2010 — 16 yrs on file
- Profile last updated
- October 28, 2025
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 2084N0400X — NUCC code
- State licenses (4)
- Florida #ME134710 · Connecticut #54629 · Michigan #4301114366 · New Hampshire #19408
- Medicaid
- NH #3118697
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1053625459. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
370
Distinct HCPCS
5
Medicare allowed
$51,895
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 176 | 108 | $127 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 90 | 89 | $140 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 57 | 55 | $183 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 29 | 20 | $137 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 18 | 18 | $141 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 92. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
12
Patients
0
Total drug cost
$150
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Topiramate | Generic | 12 | 0 | $150 |
Hospital affiliations
Frequently asked questions
What is Dr. David Hahn's medical specialty?
Dr. David Hahn practices Neurology Physician in Greenwich, CT.
Where does Dr. David Hahn practice?
Dr. David Hahn practices at 115 Mason St Ste 1, Greenwich, CT 068306630. Office phone: 2032764464.
What is Dr. David Hahn's NPI?
Dr. David Hahn's National Provider Identifier (NPI) is 1053625459, issued by NPPES.
Does Dr. David Hahn accept Medicare assignment?
Yes. Dr. David Hahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. David Hahn commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.