Dr. Leo E. Bay, DO
- Medicare services, 2024
- 741
- Medicare patients, 2024
- 253
- Part D claims, 2024
- 3,545
- Hospital affiliations
- 1
- Industry payments
- $14
- Practice address
- 1615 Maple Lane, Ashland, WI 54806
- Practice phone
- Call (715) 685-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bay'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. Leo E. Bay is a family medicine physician in Ashland, Wisconsin
Dr. Bay practices at Tamarack Health Ashland Medical Center in Ashland, Wisconsin, part of Tamarack Health.
Dr. Bay's NPI, 1659752285, was assigned on June 9, 2015. Dr. Bay graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2015. Dr. Bay holds Wisconsin license 69013-21.
- NPI
- 1659752285NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325340789
- NPI enumeration date
- June 9, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (715) 685-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Leo E. Bay practices at Tamarack Health Ashland Medical Center in Ashland, Wisconsin
Dr. Bay's primary practice is Tamarack Health Ashland Medical Center, at 1615 Maple Lane, Ashland, WI 54806 in Ashland County. The practice phone is (715) 685-5500.
- Tamarack Health Ashland Medical Center1615 Maple Lane, Ashland, WI 54806 · Ashland CountyPhone(715) 685-5500
Source: Dmand AI Affiliation Data
Dr. Leo E. Bay is affiliated with 2 sites of care and 3 medical groups
Dr. Bay's primary practice is Tamarack Health Ashland Medical Center in Ashland, Wisconsin, part of Tamarack Health. The medical group on file is Essentia Health-Duluth Clinic. Dmand AI also links Dr. Bay to 2 more medical groups and 1 group practice or clinic, 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. Leo E. Bay's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bay practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tamarack Health Ashland Medical Center | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Leo E. Bay is one of 3,101 family medicine physicians in Wisconsin
Family medicine is Dr. Bay's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dmand AI has Dr. Bay's licenses on file in 4 states: Wisconsin, Illinois, Minnesota and Washington.
Specialties and state licenses
- Family medicine, WisconsinPrimary
- Illinois license
- Minnesota license
- Washington license
Family medicine physicians near Dr. Bay
Counts of family medicine physicians 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. Leo E. Bay billed Medicare for 741 services in 2024
CMS data shows 741 Medicare services from Dr. Bay across 11 procedure codes in 2024, for 253 Medicare patients. Medicare paid $28,193 for them. Every service was in an office.
Dr. Bay's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4742024: 28440%
- Lab and pathology
- 2023: 2442024: 21611%
- Other services
- 2023: 1582024: 12422%
- Surgery
- 2023: 1302024: 11710%
- Drugs given in the office
- 2023: 642024: 0100%
- Tests and treatments
- 2023: 452024: 0100%
Dr. Bay compared with the Wisconsin median for family medicine physicians, 2024
- Dr. Bay
- Wisconsin median
- Medicare services
- 741vs 2842.6 times
- Medicare patients
- 253vs 14179% above
- Part D claims
- 2,902vs 1,1062.6 times
Medians across 3,266 family medicine physicians in Wisconsin with Dmand AI profiles that report each measure.
Dr. Bay'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. Bay?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bay and other family medicine physicians in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Leo E. Bay treated 253 Medicare patients in 2024, average age 74
CMS counts 253 Medicare patients who saw Dr. Bay in 2024. The largest group is 65 to 74, with 107 patients. 72% of them have high blood pressure, and 66% have high cholesterol. 21% are also on Medicaid. Their average risk score is 1.42, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Bay's median patient age at 67, with 41% women.
Dr. Bay's Medicare patients by age, 2024
Dr. Bay's Medicare patients by sex, 2024
- Women10943%
- Men14457%
Chronic conditions among Dr. Bay's Medicare patients, 2024
- High blood pressure72%
- High cholesterol66%
- Arthritis48%
- Diabetes29%
- Mood disorders29%
- Ischemic heart disease26%
- Depression25%
- Atrial fibrillation23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bay's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women41%
- Men59%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Leo E. Bay wrote 3,545 Medicare Part D claims in 2024
In 2024, Dr. Bay wrote 3,545 Medicare Part D claims for 309 patients. 88% of them were for generic drugs. CMS names the drug for 2,902 of them, across 74 drugs with 11 or more claims each, at $270,498 in total drug cost. In 2023, CMS named 2,789 claims across 77 drugs.
Dr. Bay's Part D claims by kind of drug, 2024
- Generic3,103 claims88%
- Brand-name411 claims12%
- Other31 claims1%
Dr. Bay'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. Bay's Part D claims, 2024
- Opioids4%129 of 3,545 claims
- Antibiotics2%65 of 3,545 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: 2,7892024: 2,9024%
Drugs named by CMS: 74 in 2024, 77 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. Leo E. Bay offers telehealth to Medicare patients
Dr. Bay accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Bay as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of nail tissue: 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. Leo E. Bay received $14 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Bay from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $14.
Companies that paid Dr. Bay the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Leo E. Bay graduated from Des Moines University of Osteopathic Medicine and Health Sciences
Dr. Bay graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2015.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Leo E. Bay'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. Leo E. Bay
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. Leo E. Bay's NPI number?
Dr. Leo E. Bay's NPI number is 1659752285. It was assigned on June 9, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Leo E. Bay?
Dr. Leo E. Bay is a family medicine physician in Ashland, Wisconsin. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Leo E. Bay practice?
Dr. Bay practices at 1615 Maple Lane, Ashland, WI 54806. Dr. Bay's primary practice is Tamarack Health Ashland Medical Center in Ashland, Wisconsin, part of Tamarack Health. Dmand AI also links Dr. Bay to 2 medical groups and 1 group practice or clinic.
What is Dr. Leo E. Bay's office phone number?
The practice phone on file for Dr. Bay is (715) 685-5500.
What is Dr. Leo E. Bay's medical license number?
Dr. Bay holds Wisconsin license 69013-21, one of the licenses on file in 4 states.
Which states has Dr. Leo E. Bay been licensed in?
Dmand AI has state licenses on file for Dr. Bay in Wisconsin, Illinois, Minnesota and Washington.
Which hospitals is Dr. Leo E. Bay affiliated with?
Dr. Bay practices at Tamarack Health Ashland Medical Center in Ashland, Wisconsin.
What medical group is Dr. Leo E. Bay part of?
Dr. Bay is linked to Essentia Health-Duluth Clinic. Dmand AI links Dr. Bay to 2 more medical groups.
Does Dr. Leo E. Bay accept Medicare?
Yes. CMS data shows Dr. Bay billed Medicare for 741 services in 2024, and Dr. Bay accepts Medicare assignment.
Does Dr. Leo E. Bay offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Bay as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Leo E. Bay see?
CMS counts 253 Medicare patients who saw Dr. Bay in 2024, with an average age of 74.
What services does Dr. Leo E. Bay bill to Medicare?
In 2024, Dr. Bay's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and lab and pathology test (80048).
Where did Dr. Leo E. Bay go to medical school?
Dr. Bay graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 2015.
What drugs does Dr. Leo E. Bay prescribe most?
In 2024 Medicare Part D data, Dr. Bay's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Warfarin Sodium.
Has Dr. Leo E. Bay received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Bay from 1 company from 2016 to 2016. The largest total came from Novartis Pharmaceuticals Corporation.
How long has Dr. Leo E. Bay been practicing?
Dr. Bay graduated from medical school in 2015, 11 years ago.
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