Dr. Il Song Hahn, MD
- Medicare services, 2021
- 988
- Industry payments
- $153
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 1450 Chapel St, New Haven, CT 06511
- Practice phone
- Call (203) 789-3088
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Pathology Associates & Consultants
Medical specialty practice · New Haven, 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. Il Song Hahn is a pathologist in New Haven, Connecticut
Dr. Hahn practices at Pathology Associates & Consultants in New Haven, Connecticut.
Dr. Hahn's NPI, 1659473635, was assigned on September 1, 2006. Dr. Hahn holds Connecticut license 015571.
- NPI
- 1659473635NPI Registry (opens in a new tab)
- NPI enumeration date
- September 1, 2006
- NPI status
- Active
- Practice phone
- (203) 789-3088
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Il Song Hahn practices at Pathology Associates & Consultants in New Haven, Connecticut
Dr. Hahn's primary practice is Pathology Associates & Consultants, at 1450 Chapel St, New Haven, CT 06511. The practice phone is (203) 789-3088.
- Pathology Associates & Consultants1450 Chapel St, New Haven, CT 06511Phone(203) 789-3088
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Il Song Hahn is affiliated with 1 site of care and 1 medical group
Dr. Hahn's primary practice is Pathology Associates & Consultants in New Haven, Connecticut. Dmand AI also links Dr. Hahn to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Il Song Hahn's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahn practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Pathology Associates & Consultants | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Il Song Hahn is one of 157 pathologists in Connecticut
Anatomic pathology and clinical pathology is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Hahn is licensed in Connecticut.
Specialties and state licenses
- Anatomic pathology and clinical pathology, ConnecticutPrimary
Pathologists near Dr. Hahn
Counts of pathologists 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. Il Song Hahn billed Medicare for 988 services in 2021
CMS data shows 988 Medicare services from Dr. Hahn across 9 procedure codes in 2021. Medicare paid $24,957 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hahn's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Lab and pathology
- 2020: 2,0772021: 98852%
Dr. Hahn compared with the Connecticut median for pathologists, 2021
- Dr. Hahn
- Connecticut median
- Medicare services
- 988vs 984Close to median
Medians across 163 pathologists in Connecticut with Dmand AI profiles that report each measure.
Dr. Hahn's most billed Medicare procedure codes, 2021
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 pathologists in Connecticut.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Il Song Hahn's patients have a median age of 61
Across all payers, Dmand AI patient panel data puts Dr. Hahn's median patient age at 61, with 50% women.
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 61
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
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Dr. Il Song Hahn received $153 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Hahn from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $153.
Companies that paid Dr. Hahn the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Il Song 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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Il Song 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. Il Song Hahn's NPI number?
Dr. Il Song Hahn's NPI number is 1659473635. It was assigned on September 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Il Song Hahn?
Dr. Il Song Hahn is a pathologist in New Haven, Connecticut. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Il Song Hahn practice?
Dr. Hahn practices at 1450 Chapel St, New Haven, CT 06511. Dr. Hahn's primary practice is Pathology Associates & Consultants in New Haven, Connecticut. Dmand AI also links Dr. Hahn to 1 medical group.
What is Dr. Il Song Hahn's office phone number?
The practice phone on file for Dr. Hahn is (203) 789-3088.
What is Dr. Il Song Hahn's medical license number?
Dr. Hahn holds Connecticut license 015571.
Does Dr. Il Song Hahn accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 988 services in 2021.
What services does Dr. Il Song Hahn bill to Medicare?
In 2021, Dr. Hahn's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88311) and lab and pathology test (88304).
Has Dr. Il Song Hahn received payments from drug or device companies?
CMS Open Payments shows $153 in general payments to Dr. Hahn from 1 company from 2025 to 2025. The largest total came from Abbott Laboratories.
How long has Dr. Il Song Hahn been practicing?
Dr. Hahn's NPI was assigned in 2006.
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