Dr. David K. Hahn, MD
- Medicare services, 2024
- 293
- Medicare patients, 2024
- 220
- Part D claims, 2023
- 12
- Hospital affiliations
- 4
- Industry payments
- $1,423
- Practice address
- 34 Maple St, Norwalk, CT 06850
- Practice phone
- Call (203) 852-2016
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Norwalk Hospital
Norwalk, Connecticut
Find Dr. Hahn's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. David K. Hahn is a neurologist in Norwalk, Connecticut
Dr. Hahn practices at Norwalk Hospital in Norwalk, Connecticut.
Dr. Hahn's NPI, 1053625459, was assigned on July 28, 2010. Dr. Hahn graduated from Warren Alpert Medical School of Brown University in 2008. Dr. Hahn holds Florida license ME134710.
- NPI
- 1053625459NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911217724
- NPI enumeration date
- July 28, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (203) 852-2016
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David K. Hahn practices at Norwalk Hospital in Norwalk, Connecticut
Dr. Hahn's primary practice is Norwalk Hospital, at 34 Maple St, Norwalk, CT 06850 in Western Ct County. The practice phone is (203) 852-2016.
- Norwalk Hospital34 Maple St, Norwalk, CT 06850 · Western Ct CountyPhone(203) 852-2016
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. David K. Hahn is affiliated with 8 sites of care and 9 medical groups
Dr. Hahn's primary practice is Norwalk Hospital in Norwalk, Connecticut. Dr. Hahn is also affiliated with Norwalk Hospital. The medical group on file is Northeast Medical Group. Dmand AI also links Dr. Hahn to 3 more hospitals, 8 medical groups, 2 group practices and clinics and 1 physician office, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David K. Hahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahn practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Norwalk Hospital | Available with a free account |
| +7 more sites and 8 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David K. Hahn is one of 302 neurologists in Connecticut
Neurology is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dmand AI has Dr. Hahn's licenses on file in 4 states: Florida, Connecticut, Michigan and New Hampshire.
Specialties and state licenses
- Neurology, FloridaPrimary
- Connecticut license
- Michigan license
- New Hampshire license
Neurologists near Dr. Hahn
Counts of neurologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. David K. Hahn billed Medicare for 293 services in 2024
CMS data shows 293 Medicare services from Dr. Hahn across 4 procedure codes in 2024, for 220 Medicare patients. Medicare paid $32,135 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hahn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3702024: 29321%
Dr. Hahn compared with the Connecticut median for neurologists, 2024
- Dr. Hahn
- Connecticut median
- Medicare services
- 293vs 22331% above
- Medicare patients
- 220vs 15740% above
- Part D claims
- 12vs 24195% below
Medians across 293 neurologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Hahn's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David K. Hahn treated 220 Medicare patients in 2024, average age 78
CMS counts 220 Medicare patients who saw Dr. Hahn in 2024. The largest group is 75 to 84, with 85 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 29% are also on Medicaid. Their average risk score is 2.34, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Hahn's median patient age at 70, with 47% women.
Dr. Hahn's Medicare patients by age, 2024
Dr. Hahn's Medicare patients by sex, 2024
- Women10849%
- Men11251%
Chronic conditions among Dr. Hahn's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Stroke or TIA73%
- Arthritis60%
- Ischemic heart disease50%
- Mood disorders46%
- Anxiety41%
- Atrial fibrillation41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hahn's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women47%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David K. Hahn wrote 12 Medicare Part D claims in 2023
In 2023, Dr. Hahn wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $150 in total drug cost. In 2022, CMS named 12 claims across 1 drug.
Dr. Hahn's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 122023: 12No change
Drugs named by CMS: 1 in 2023, 1 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. David K. Hahn takes part in Medicare
Dr. Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. David K. Hahn received $1,423 in industry payments from 2016 to 2025
CMS Open Payments shows 25 general payments to Dr. Hahn from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. UCB, Inc. paid the most, $277.
General payments to Dr. Hahn by program year, 2016 to 2025
General payments to Dr. Hahn by kind, 2016 to 2025
- Food and beverage$1,37396%
- Education$504%
Companies that paid Dr. Hahn the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. David K. Hahn graduated from Warren Alpert Medical School of Brown University
Dr. Hahn graduated from Warren Alpert Medical School of Brown University in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David K. Hahn's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. David K. Hahn
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. David K. Hahn's NPI number?
Dr. David K. Hahn's NPI number is 1053625459. It was assigned on July 28, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. David K. Hahn?
Dr. David K. Hahn is a neurologist in Norwalk, Connecticut. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).
Where does Dr. David K. Hahn practice?
Dr. Hahn practices at 34 Maple St, Norwalk, CT 06850. Dr. Hahn's primary practice is Norwalk Hospital in Norwalk, Connecticut. Dmand AI also links Dr. Hahn to 3 hospitals, 8 medical groups, 2 group practices and clinics and 1 physician office.
What is Dr. David K. Hahn's office phone number?
The practice phone on file for Dr. Hahn is (203) 852-2016.
What is Dr. David K. Hahn's medical license number?
Dr. Hahn holds Florida license ME134710, one of the licenses on file in 4 states.
Which states has Dr. David K. Hahn been licensed in?
Dmand AI has state licenses on file for Dr. Hahn in Florida, Connecticut, Michigan and New Hampshire.
Which hospitals is Dr. David K. Hahn affiliated with?
Dr. Hahn is affiliated with Norwalk Hospital. Dmand AI links Dr. Hahn to 3 more hospitals.
What medical group is Dr. David K. Hahn part of?
Dr. Hahn is linked to Northeast Medical Group. Dmand AI links Dr. Hahn to 8 more medical groups.
Does Dr. David K. Hahn accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 293 services in 2024, and Dr. Hahn accepts Medicare assignment.
How many Medicare patients does Dr. David K. Hahn see?
CMS counts 220 Medicare patients who saw Dr. Hahn in 2024, with an average age of 78.
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What services does Dr. David K. Hahn bill to Medicare?
In 2024, Dr. Hahn's most billed Medicare services were hospital inpatient care (99222), hospital inpatient care (99233) and hospital inpatient care (99223).
Where did Dr. David K. Hahn go to medical school?
Dr. Hahn graduated from Warren Alpert Medical School of Brown University in 2008.
What drugs does Dr. David K. Hahn prescribe most?
In 2023 Medicare Part D data, Dr. Hahn's most prescribed drugs by claims were Topiramate.
Has Dr. David K. Hahn received payments from drug or device companies?
CMS Open Payments shows $1,423 in general payments to Dr. Hahn from 12 companies from 2016 to 2025. The largest total came from UCB, Inc.
How long has Dr. David K. Hahn been practicing?
Dr. Hahn graduated from medical school in 2008, 18 years ago.
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