Dr. Charles W. Mayo II, MD
- Part D claims, 2024
- 6,169
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 1504 190th Ave, Balsam Lake, WI 54810
- Practice phone
- Call (715) 825-3278
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Unity Clinic
Rural Health Clinic - Hospital-Owned · Balsam Lake, Wisconsin
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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. Charles W. Mayo II is a psychiatrist in Balsam Lake, Wisconsin
Dr. Mayo practices at Unity Clinic in Balsam Lake, Wisconsin.
Dr. Mayo's NPI, 1437290640, was assigned on February 9, 2007. Dr. Mayo graduated from University of Minnesota Medical School in 1988. Dr. Mayo holds Wisconsin license 37910.
- NPI
- 1437290640NPI Registry (opens in a new tab)
- NPI enumeration date
- February 9, 2007
- NPI status
- Active
- Practice phone
- (715) 825-3278
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Charles W. Mayo II practices at Unity Clinic in Balsam Lake, Wisconsin
Dr. Mayo's primary practice is Unity Clinic, at 1504 190th Ave, Balsam Lake, WI 54810. The practice phone is (715) 825-3278.
- Unity Clinic1504 190th Ave, Balsam Lake, WI 54810Phone(715) 825-3278
Source: Dmand AI Affiliation Data
Dr. Charles W. Mayo II is affiliated with 1 site of care and 1 medical group
Dr. Mayo's primary practice is Unity Clinic in Balsam Lake, Wisconsin. The medical group on file is St. Croix Health. Dr. Mayo's employer is on file too: a rural health clinic (rhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Charles W. Mayo II's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mayo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Unity Clinic | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Charles W. Mayo II is one of 688 psychiatrists in Wisconsin
Psychiatry is Dr. Mayo's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Mayo is licensed in Wisconsin.
Specialties and state licenses
- Psychiatry, WisconsinPrimary
Psychiatrists near Dr. Mayo
Counts of psychiatrists 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. Charles W. Mayo II's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Mayo's median patient age at 44, with 64% women.
Dr. Mayo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women64%
- Men36%
Source: Dmand AI Patient Panel Data
Dr. Charles W. Mayo II wrote 6,169 Medicare Part D claims in 2024
In 2024, Dr. Mayo wrote 6,169 Medicare Part D claims for 257 patients. 92% of them were for generic drugs. CMS names the drug for 6,004 of them, across 73 drugs with 11 or more claims each, at $661,043 in total drug cost. In 2023, CMS named 5,932 claims across 74 drugs.
Dr. Mayo's Part D claims by kind of drug, 2024
- Generic5,697 claims92%
- Brand-name472 claims8%
Dr. Mayo'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. Mayo's Part D claims, 2024
- Antipsychotics, patients 65 and over7%452 of 6,169 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: 5,9322024: 6,0041%
Drugs named by CMS: 73 in 2024, 74 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
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Dr. Charles W. Mayo II graduated from University of Minnesota Medical School
Dr. Mayo graduated from University of Minnesota Medical School in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Charles W. Mayo II'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Charles W. Mayo II
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. Charles W. Mayo II's NPI number?
Dr. Charles W. Mayo II's NPI number is 1437290640. It was assigned on February 9, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Charles W. Mayo II?
Dr. Charles W. Mayo II is a psychiatrist in Balsam Lake, Wisconsin. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Charles W. Mayo II practice?
Dr. Mayo practices at 1504 190th Ave, Balsam Lake, WI 54810. Dr. Mayo's primary practice is Unity Clinic in Balsam Lake, Wisconsin.
What is Dr. Charles W. Mayo II's office phone number?
The practice phone on file for Dr. Mayo is (715) 825-3278.
What is Dr. Charles W. Mayo II's medical license number?
Dr. Mayo holds Wisconsin license 37910.
What medical group is Dr. Charles W. Mayo II part of?
Dr. Mayo is linked to St. Croix Health.
Where did Dr. Charles W. Mayo II go to medical school?
Dr. Mayo graduated from University of Minnesota Medical School in 1988.
What drugs does Dr. Charles W. Mayo II prescribe most?
In 2024 Medicare Part D data, Dr. Mayo's most prescribed drugs by claims were Clonazepam, Aripiprazole and Trazodone HCl.
How long has Dr. Charles W. Mayo II been practicing?
Dr. Mayo graduated from medical school in 1988, 38 years ago.
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