Dr. Peter S. Hahn, MD
- Medicare services, 2024
- 175
- Medicare patients, 2024
- 38
- Hospital affiliations
- 1
- Industry payments
- $2,994
- Medical group
- 1
- Practice address
- 25 Wells Street, Westerly, RI 02891
- Practice phone
- Call (401) 596-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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. Peter S. Hahn is an internist in Westerly, Rhode Island
Dr. Hahn practices at Yale New Haven Health Westerly Hospital in Westerly, Rhode Island, part of Yale New Haven Health System.
Dr. Hahn's NPI, 1184690703, was assigned on February 24, 2006. Dr. Hahn graduated from Weill Cornell Medicine in 1998. Dr. Hahn holds Connecticut license 039899.
- NPI
- 1184690703NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0840214466
- NPI enumeration date
- February 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (401) 596-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter S. Hahn practices at Yale New Haven Health Westerly Hospital in Westerly, Rhode Island
Dr. Hahn's primary practice is Yale New Haven Health Westerly Hospital, at 25 Wells Street, Westerly, RI 02891 in Washington County. The practice phone is (401) 596-6000.
- Yale New Haven Health Westerly Hospital25 Wells Street, Westerly, RI 02891 · Washington CountyPhone(401) 596-6000
Source: Dmand AI Affiliation Data
Dr. Peter S. Hahn is affiliated with 2 sites of care and 1 medical group
Dr. Hahn's primary practice is Yale New Haven Health Westerly Hospital in Westerly, Rhode Island, part of Yale New Haven Health System. The medical group on file is UHS Wilson Medical Center. Dmand AI also links Dr. Hahn to 1 more physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter S. Hahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahn practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Yale New Haven Health Westerly Hospital | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Yale New Haven Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Peter S. Hahn is one of 805 internists in Rhode Island
Internal medicine is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hahn is board certified in clinical cardiac electrophysiology by the American Board of Internal Medicine. Dmand AI has Dr. Hahn's licenses on file in 3 states: Connecticut, New York and Massachusetts.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
- New York license
- Massachusetts license
Internists near Dr. Hahn
Counts of internists 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. Peter S. Hahn billed Medicare for 175 services in 2024
CMS data shows 175 Medicare services from Dr. Hahn across 5 procedure codes in 2024, for 38 Medicare patients. Medicare paid $50,957 for them. Every service was in an office.
Dr. Hahn's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 722024: 788%
- Office and hospital visits
- 2023: 552024: 6315%
- Surgery
- 2023: 372024: 348%
Dr. Hahn compared with the Rhode Island median for internists, 2024
- Dr. Hahn
- Rhode Island median
- Medicare services
- 175vs 34249% below
- Medicare patients
- 38vs 14574% below
Medians across 772 internists in Rhode Island 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.
Need commercial claims for Dr. Hahn?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hahn and other internists in Rhode Island.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter S. Hahn treated 38 Medicare patients in 2024, average age 72
CMS counts 38 Medicare patients who saw Dr. Hahn in 2024. The largest group is 65 to 74, with 27 patients. 63% of them have high cholesterol, and 61% have high blood pressure. Their average risk score is 0.66, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hahn's median patient age at 68, with 72% women.
Dr. Hahn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Hahn's Medicare patients, 2024
- High cholesterol63%
- High blood pressure61%
- Arthritis55%
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 68
Patient panel by sex, all payers
- Women72%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter S. Hahn ranks in the 69th percentile for varicose vein removal in Medicare
Dr. Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 37 procedures of varicose vein removal by Dr. Hahn, more than 69% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Hahn ranks in Medicare procedure volume
- Varicose vein removal
- 69th percentile37 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Peter S. Hahn received $2,994 in industry payments from 2016 to 2025
CMS Open Payments shows 15 general payments to Dr. Hahn from 6 drug and device companies from 2016 to 2025. Debt forgiveness make up the largest share, 78% of the total. Merit Medical Systems Inc paid the most, $2,348.
General payments to Dr. Hahn by program year, 2016 to 2025
General payments to Dr. Hahn by kind, 2016 to 2025
- Debt forgiveness$2,34878%
- Food and beverage$64722%
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. Peter S. Hahn graduated from Weill Cornell Medicine
Dr. Hahn graduated from Weill Cornell Medicine in 1998. Dr. Hahn is a member of ACC.
- Medical school
- Board certified in clinical cardiac electrophysiology
- Board certified in cardiovascular disease
- Board certified in electrophysiology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Peter S. Hahn accepts plans from 15 insurance carriers
Dr. Hahn is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- Elevance
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- +7 more carriersWith a free account
Plan types Dr. Hahn accepts, by number of carriers
- PPO10
- HMO8
- Medicare8
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Peter S. 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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Peter S. 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. Peter S. Hahn's NPI number?
Dr. Peter S. Hahn's NPI number is 1184690703. It was assigned on February 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter S. Hahn?
Dr. Peter S. Hahn is an internist in Westerly, Rhode Island. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Peter S. Hahn practice?
Dr. Hahn practices at 25 Wells Street, Westerly, RI 02891. Dr. Hahn's primary practice is Yale New Haven Health Westerly Hospital in Westerly, Rhode Island, part of Yale New Haven Health System. Dmand AI also links Dr. Hahn to 1 physician office.
What is Dr. Peter S. Hahn's office phone number?
The practice phone on file for Dr. Hahn is (401) 596-6000.
What is Dr. Peter S. Hahn's medical license number?
Dr. Hahn holds Connecticut license 039899, one of the licenses on file in 3 states.
Which states has Dr. Peter S. Hahn been licensed in?
Dmand AI has state licenses on file for Dr. Hahn in Connecticut (2001 to 2026), New York (1999 to 2019) and Massachusetts (2006 to 2015).
Which hospitals is Dr. Peter S. Hahn affiliated with?
Dr. Hahn practices at Yale New Haven Health Westerly Hospital in Westerly, Rhode Island.
What medical group is Dr. Peter S. Hahn part of?
Dr. Hahn is linked to UHS Wilson Medical Center.
Does Dr. Peter S. Hahn accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 175 services in 2024, and Dr. Hahn accepts Medicare assignment.
How many Medicare patients does Dr. Peter S. Hahn see?
CMS counts 38 Medicare patients who saw Dr. Hahn in 2024, with an average age of 72.
Show 6 more questionsShow fewer questions
Is Dr. Peter S. Hahn board certified?
Yes. Dr. Hahn is board certified in clinical cardiac electrophysiology by the American Board of Internal Medicine.
What services does Dr. Peter S. Hahn bill to Medicare?
In 2024, Dr. Hahn's most billed Medicare services were blood vessel study (93970), office visit, established patient (99215) and surgery: heart and blood vessels (36475).
Where did Dr. Peter S. Hahn go to medical school?
Dr. Hahn graduated from Weill Cornell Medicine in 1998.
Has Dr. Peter S. Hahn received payments from drug or device companies?
CMS Open Payments shows $2,994 in general payments to Dr. Hahn from 6 companies from 2016 to 2025. The largest total came from Merit Medical Systems Inc.
How long has Dr. Peter S. Hahn been practicing?
Dr. Hahn graduated from medical school in 1998, 28 years ago.
What insurance does Dr. Peter S. Hahn accept?
Dr. Hahn is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
Selling to internal medicine practices?
See internists in Rhode Island by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card