Dr. Cynthia K. Hahn, MD, PhD
- Medicare services, 2024
- 87
- Medicare patients, 2024
- 38
- Part D claims, 2024
- 33
- MIPS score, 2024
- 84
- Hospital affiliations
- 2
- Practice address
- 450 Brookline Avenue, Boston, MA 02115
- 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
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Dr. Cynthia K. Hahn is an internist in Boston, Massachusetts
Dr. Hahn practices at Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute.
Dr. Hahn's NPI, 1265881395, was assigned on June 9, 2016. Dr. Hahn graduated from Geisel School of Medicine at Dartmouth in 2016. Dr. Hahn holds Massachusetts license 267606.
- NPI
- 1265881395NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224322755
- NPI enumeration date
- June 9, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Cynthia K. Hahn practices at Dana-Farber Cancer Institute in Boston, Massachusetts
Dr. Hahn's primary practice is Dana-Farber Cancer Institute, at 450 Brookline Avenue, Boston, MA 02115.
- Dana-Farber Cancer Institute450 Brookline Avenue, Boston, MA 02115
Source: Dmand AI Affiliation Data
Dr. Cynthia K. Hahn is affiliated with 2 sites of care and 1 medical group
Dr. Hahn's primary practice is Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute. Dr. Hahn is also affiliated with Brigham and Women's Hospital. The medical group on file is Binney Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Cynthia K. 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 |
|---|---|
| Dana-Farber Cancer Institute | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Cynthia K. Hahn is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Hahn's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hahn is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
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. Cynthia K. Hahn billed Medicare for 87 services in 2024
CMS data shows 87 Medicare services from Dr. Hahn across 3 procedure codes in 2024, for 38 Medicare patients. Medicare paid $7,885 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Hahn compared with the Massachusetts median for internists, 2024
- Dr. Hahn
- Massachusetts median
- Medicare services
- 87vs 43180% below
- Medicare patients
- 38vs 19480% below
- Part D claims
- 11vs 40297% below
Medians across 5,369 internists in Massachusetts 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. Cynthia K. Hahn treated 38 Medicare patients in 2024, average age 74
CMS counts 38 Medicare patients who saw Dr. Hahn in 2024. The largest group is 65 to 74, with 20 patients. 74% of them have high blood pressure, and 68% have high cholesterol. Their average risk score is 2.52, 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 69, with 53% women.
Dr. Hahn's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hahn's Medicare patients by sex, 2024
- Women1950%
- Men1950%
Chronic conditions among Dr. Hahn's Medicare patients, 2024
- High blood pressure74%
- High cholesterol68%
- Arthritis45%
- Chronic kidney disease42%
- Anxiety39%
- Ischemic heart disease34%
- Heart failure32%
- Cancer29%
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 69
Patient panel by sex, all payers
- Women53%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Cynthia K. Hahn wrote 33 Medicare Part D claims in 2024
In 2024, Dr. Hahn wrote 33 Medicare Part D claims. 64% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $149,882 in total drug cost.
Dr. Hahn's Part D claims by kind of drug, 2024
- Generic21 claims64%
- Brand-name12 claims36%
Dr. Hahn's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Cynthia K. Hahn scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Hahn for performance year 2024, reported as part of a group. Dr. Hahn accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hahn as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Hahn's MIPS scores, performance year 2024
- 84of 100Final score
- 65of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 69of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Cynthia K. Hahn graduated from Geisel School of Medicine at Dartmouth
Dr. Hahn graduated from Geisel School of Medicine at Dartmouth in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Cynthia 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 | 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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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)Clinician Public Reporting: Overall MIPS Performance (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. Cynthia 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. Cynthia K. Hahn's NPI number?
Dr. Cynthia K. Hahn's NPI number is 1265881395. It was assigned on June 9, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Cynthia K. Hahn?
Dr. Cynthia K. Hahn is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Cynthia K. Hahn practice?
Dr. Hahn practices at 450 Brookline Avenue, Boston, MA 02115. Dr. Hahn's primary practice is Dana-Farber Cancer Institute in Boston, Massachusetts, part of Dana-Farber Cancer Institute.
What is Dr. Cynthia K. Hahn's medical license number?
Dr. Hahn holds Massachusetts license 267606.
Which hospitals is Dr. Cynthia K. Hahn affiliated with?
Dr. Hahn practices at Dana-Farber Cancer Institute in Boston, Massachusetts. Dr. Hahn is also affiliated with Brigham and Women's Hospital.
What medical group is Dr. Cynthia K. Hahn part of?
Dr. Hahn is linked to Binney Medical Group.
Does Dr. Cynthia K. Hahn accept Medicare?
Yes. CMS data shows Dr. Hahn billed Medicare for 87 services in 2024, and Dr. Hahn accepts Medicare assignment.
Does Dr. Cynthia K. Hahn offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hahn as offering telehealth services.
What is Dr. Cynthia K. Hahn's MIPS score?
Dr. Hahn's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Cynthia K. Hahn see?
CMS counts 38 Medicare patients who saw Dr. Hahn in 2024, with an average age of 74.
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What services does Dr. Cynthia K. Hahn bill to Medicare?
In 2024, Dr. Hahn's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99215) and office visit, new patient (99205).
Where did Dr. Cynthia K. Hahn go to medical school?
Dr. Hahn graduated from Geisel School of Medicine at Dartmouth in 2016.
What drugs does Dr. Cynthia K. Hahn prescribe most?
In 2024 Medicare Part D data, Dr. Hahn's most prescribed drugs by claims were Venclexta.
How long has Dr. Cynthia K. Hahn been practicing?
Dr. Hahn graduated from medical school in 2016, 10 years ago.
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