Dr. Lynn E. Hahnfeld, MD
- Medicare services, 2024
- 1,610
- Medicare patients, 2024
- 565
- Part D claims, 2024
- 431
- Hospital affiliations
- 5
- Industry payments
- $205
- Practice address
- 700 South Park St, Madison, WI 53715
- Practice phone
- Call (608) 251-6100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hahnfeld'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. Lynn E. Hahnfeld is a urologist in Madison, Wisconsin
Dr. Hahnfeld practices at SSM Health St. Mary's Hospital - Madison in Madison, Wisconsin, part of SSM Health Care.
Dr. Hahnfeld's NPI, 1861431769, was assigned on June 6, 2006. Dr. Hahnfeld graduated from Rush Medical College of Rush University in 1994. Dr. Hahnfeld holds Wisconsin license 36940-020.
- NPI
- 1861431769NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0143278499
- NPI enumeration date
- June 6, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (608) 251-6100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lynn E. Hahnfeld practices at SSM Health St. Mary's Hospital - Madison in Madison, Wisconsin
Dr. Hahnfeld's primary practice is SSM Health St. Mary's Hospital - Madison, at 700 South Park St, Madison, WI 53715 in Dane County. The practice phone is (608) 251-6100.
- SSM Health St. Mary's Hospital - Madison700 South Park St, Madison, WI 53715 · Dane CountyPhone(608) 251-6100
Source: Dmand AI Affiliation Data
Dr. Lynn E. Hahnfeld is affiliated with 6 sites of care and 2 medical groups
Dr. Hahnfeld's primary practice is SSM Health St. Mary's Hospital - Madison in Madison, Wisconsin, part of SSM Health Care. Dr. Hahnfeld is also affiliated with SSM Health St. Clare Hospital - Baraboo. The medical group on file is SSM Health Dean Medical Group. Dmand AI also links Dr. Hahnfeld to 3 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lynn E. Hahnfeld's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hahnfeld practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Mary's Hospital - Madison | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Lynn E. Hahnfeld is one of 213 urologists in Wisconsin
Urology is Dr. Hahnfeld's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Hahnfeld is licensed in Wisconsin.
Specialties and state licenses
- Urology, WisconsinPrimary
Urologists near Dr. Hahnfeld
Counts of urologists 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. Lynn E. Hahnfeld billed Medicare for 1,610 services in 2024
CMS data shows 1,610 Medicare services from Dr. Hahnfeld across 23 procedure codes in 2024, for 565 Medicare patients. Medicare paid $117,893 for them.
Dr. Hahnfeld's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 4992024: 57114%
- Office and hospital visits
- 2023: 5362024: 5242%
- Lab and pathology
- 2023: 3732024: 3935%
- Imaging
- 2023: 262024: 55112%
- Drugs given in the office
- 2023: 242024: 3442%
- Tests and treatments
- 2023: 232024: 3343%
Where Dr. Hahnfeld's Medicare services took place, 2024
- In an office1,52194%
- In a facility896%
Dr. Hahnfeld compared with the Wisconsin median for urologists, 2024
- Dr. Hahnfeld
- Wisconsin median
- Medicare services
- 1,610vs 5632.9 times
- Medicare patients
- 565vs 28896% above
- Part D claims
- 352vs 55036% below
Medians across 215 urologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Hahnfeld'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. Hahnfeld?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hahnfeld and other urologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Lynn E. Hahnfeld treated 565 Medicare patients in 2024, average age 74
CMS counts 565 Medicare patients who saw Dr. Hahnfeld in 2024. The largest group is 65 to 74, with 284 patients. 72% of them have high cholesterol, and 67% have high blood pressure. 9% are also on Medicaid. Their average risk score is 1.23, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hahnfeld's median patient age at 70, with 26% women.
Dr. Hahnfeld's Medicare patients by age, 2024
Dr. Hahnfeld's Medicare patients by sex, 2024
- Women15728%
- Men40872%
Chronic conditions among Dr. Hahnfeld's Medicare patients, 2024
- High cholesterol72%
- High blood pressure67%
- Cancer33%
- Arthritis32%
- Diabetes29%
- Chronic kidney disease26%
- Ischemic heart disease25%
- Atrial fibrillation20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hahnfeld'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
- Women26%
- Men74%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Lynn E. Hahnfeld wrote 431 Medicare Part D claims in 2024
In 2024, Dr. Hahnfeld wrote 431 Medicare Part D claims for 244 patients. 97% of them were for generic drugs. CMS names the drug for 352 of them, across 8 drugs with 11 or more claims each, at $15,197 in total drug cost. In 2023, CMS named 302 claims across 10 drugs.
Dr. Hahnfeld's Part D claims by kind of drug, 2024
- Generic416 claims97%
- Brand-name15 claims3%
Dr. Hahnfeld'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.
Drug classes CMS tracks in Dr. Hahnfeld's Part D claims, 2024
- Antibiotics55%238 of 431 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3022024: 35217%
Drugs named by CMS: 8 in 2024, 10 in 2023.
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. Lynn E. Hahnfeld offers telehealth to Medicare patients
Dr. Hahnfeld accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Hahnfeld as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Prostate resection: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Lynn E. Hahnfeld received $205 in industry payments from 2024 to 2025
CMS Open Payments shows 2 general payments to Dr. Hahnfeld from 2 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Calyxo, Inc. paid the most, $179.
General payments to Dr. Hahnfeld by program year, 2024 to 2025
Companies that paid Dr. Hahnfeld the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Lynn E. Hahnfeld graduated from Rush Medical College of Rush University
Dr. Hahnfeld graduated from Rush Medical College of Rush University in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Lynn E. Hahnfeld'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)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 |
| 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. Lynn E. Hahnfeld
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. Lynn E. Hahnfeld's NPI number?
Dr. Lynn E. Hahnfeld's NPI number is 1861431769. It was assigned on June 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Lynn E. Hahnfeld?
Dr. Lynn E. Hahnfeld is a urologist in Madison, Wisconsin. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Lynn E. Hahnfeld practice?
Dr. Hahnfeld practices at 700 South Park St, Madison, WI 53715. Dr. Hahnfeld's primary practice is SSM Health St. Mary's Hospital - Madison in Madison, Wisconsin, part of SSM Health Care. Dmand AI also links Dr. Hahnfeld to 3 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Lynn E. Hahnfeld's office phone number?
The practice phone on file for Dr. Hahnfeld is (608) 251-6100.
What is Dr. Lynn E. Hahnfeld's medical license number?
Dr. Hahnfeld holds Wisconsin license 36940-020.
Which hospitals is Dr. Lynn E. Hahnfeld affiliated with?
Dr. Hahnfeld practices at SSM Health St. Mary's Hospital - Madison in Madison, Wisconsin. Dr. Hahnfeld is also affiliated with SSM Health St. Clare Hospital - Baraboo. Dmand AI links Dr. Hahnfeld to 3 more hospitals.
What medical group is Dr. Lynn E. Hahnfeld part of?
Dr. Hahnfeld is linked to SSM Health Dean Medical Group. Dmand AI links Dr. Hahnfeld to 1 more medical group.
Does Dr. Lynn E. Hahnfeld accept Medicare?
Yes. CMS data shows Dr. Hahnfeld billed Medicare for 1,610 services in 2024, and Dr. Hahnfeld accepts Medicare assignment.
Does Dr. Lynn E. Hahnfeld offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Hahnfeld as offering telehealth services.
How many Medicare patients does Dr. Lynn E. Hahnfeld see?
CMS counts 565 Medicare patients who saw Dr. Hahnfeld in 2024, with an average age of 74.
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What services does Dr. Lynn E. Hahnfeld bill to Medicare?
In 2024, Dr. Hahnfeld's most billed Medicare services were office visit, established patient (99214), lab and pathology test (81001) and office visit, new patient (99204).
Where did Dr. Lynn E. Hahnfeld go to medical school?
Dr. Hahnfeld graduated from Rush Medical College of Rush University in 1994.
What drugs does Dr. Lynn E. Hahnfeld prescribe most?
In 2024 Medicare Part D data, Dr. Hahnfeld's most prescribed drugs by claims were Tamsulosin HCl, Cefpodoxime Proxetil and Sulfamethoxazole-Trimethoprim.
Has Dr. Lynn E. Hahnfeld received payments from drug or device companies?
CMS Open Payments shows $205 in general payments to Dr. Hahnfeld from 2 companies from 2024 to 2025. The largest total came from Calyxo, Inc.
How long has Dr. Lynn E. Hahnfeld been practicing?
Dr. Hahnfeld graduated from medical school in 1994, 32 years ago.
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