Dr. Brian M. Mulrennan, MD
- Medicare services, 2024
- 116
- Medicare patients, 2024
- 38
- Part D claims, 2024
- 115
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 1910 South Ave, Heritage Building 2 West, La Crosse, WI 54601
- Practice phone
- Call (608) 775-3176
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gundersen Lutheran Medical Center - Dialysis
Dialysis Center - Hospital-Based · La Crosse, Wisconsin
Find Dr. Mulrennan's professional email, personal email and mobile number
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Dr. Brian M. Mulrennan is an internist in La Crosse, Wisconsin
Dr. Mulrennan practices at Gundersen Lutheran Medical Center - Dialysis in La Crosse, Wisconsin.
Dr. Mulrennan's NPI, 1073515391, was assigned on June 1, 2005. Dr. Mulrennan graduated from University of Minnesota Medical School in 1984. Dr. Mulrennan holds Wisconsin license 26840.
- NPI
- 1073515391NPI Registry (opens in a new tab)
- NPI enumeration date
- June 1, 2005
- NPI status
- Active
- Practice phone
- (608) 775-3176
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Brian M. Mulrennan practices at Gundersen Lutheran Medical Center - Dialysis in La Crosse, Wisconsin
Dr. Mulrennan's primary practice is Gundersen Lutheran Medical Center - Dialysis, at 1910 South Ave, Heritage Building 2 West, La Crosse, WI 54601 in La Crosse County. The practice phone is (608) 775-3176.
- Gundersen Lutheran Medical Center - Dialysis1910 South Ave, Heritage Building 2 West, La Crosse, WI 54601 · La Crosse CountyPhone(608) 775-3176
Source: Dmand AI Affiliation Data
Dr. Brian M. Mulrennan is affiliated with 2 sites of care and 2 medical groups
Dr. Mulrennan's primary practice is Gundersen Lutheran Medical Center - Dialysis in La Crosse, Wisconsin. The medical group on file is Gundersen Lutheran Medical Center. Dmand AI also links Dr. Mulrennan to 1 more group practice or clinic and 1 medical group, each named with a free account. Dr. Mulrennan's employer is on file too: a dialysis center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brian M. Mulrennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mulrennan practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gundersen Lutheran Medical Center - Dialysis | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Brian M. Mulrennan is one of 1,675 internists in Wisconsin
Internal medicine is Dr. Mulrennan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mulrennan is licensed in Wisconsin.
Specialties and state licenses
- Internal medicine, WisconsinPrimary
Internists near Dr. Mulrennan
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. Brian M. Mulrennan billed Medicare for 116 services in 2024
CMS data shows 116 Medicare services from Dr. Mulrennan across 3 procedure codes in 2024, for 38 Medicare patients. Medicare paid $5,500 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mulrennan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1082024: 1167%
Dr. Mulrennan compared with the Wisconsin median for internists, 2024
- Dr. Mulrennan
- Wisconsin median
- Medicare services
- 116vs 45775% below
- Medicare patients
- 38vs 19981% below
- Part D claims
- 121vs 43372% below
Medians across 1,658 internists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Mulrennan'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. Brian M. Mulrennan treated 38 Medicare patients in 2024, average age 74
CMS counts 38 Medicare patients who saw Dr. Mulrennan in 2024. The largest group is 65 to 74, with 11 patients. 75% of them have high blood pressure, and 66% have high cholesterol. 42% are also on Medicaid. Their average risk score is 2.73, 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. Mulrennan's median patient age at 66, with 50% women.
Dr. Mulrennan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mulrennan's Medicare patients by sex, 2024
- Women2155%
- Men1745%
Chronic conditions among Dr. Mulrennan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol66%
- Mood disorders53%
- Atrial fibrillation50%
- Depression45%
- Chronic kidney disease42%
- Anxiety39%
- Ischemic heart disease39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mulrennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brian M. Mulrennan wrote 115 Medicare Part D claims in 2024
In 2024, Dr. Mulrennan wrote 115 Medicare Part D claims for 38 patients. 82% of them were for generic drugs. They cover 7 drugs, with $17,729 in total drug cost. In 2022, CMS named 173 claims across 12 drugs.
Dr. Mulrennan's Part D claims by kind of drug, 2024
- Generic94 claims82%
- Brand-name and other21 claims18%
Dr. Mulrennan's most prescribed drugs by claims, 2023
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. Mulrennan's Part D claims, 2024
- Antibiotics10%12 of 115 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 1732023: 12130%
Drugs named by CMS: 7 in 2023, 12 in 2022.
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. Brian M. Mulrennan graduated from University of Minnesota Medical School
Dr. Mulrennan graduated from University of Minnesota Medical School in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brian M. Mulrennan'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) |
| 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. Brian M. Mulrennan
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. Brian M. Mulrennan's NPI number?
Dr. Brian M. Mulrennan's NPI number is 1073515391. It was assigned on June 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Brian M. Mulrennan?
Dr. Brian M. Mulrennan is an internist in La Crosse, Wisconsin. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Brian M. Mulrennan practice?
Dr. Mulrennan practices at 1910 South Ave, Heritage Building 2 West, La Crosse, WI 54601. Dr. Mulrennan's primary practice is Gundersen Lutheran Medical Center - Dialysis in La Crosse, Wisconsin. Dmand AI also links Dr. Mulrennan to 1 group practice or clinic and 1 medical group.
What is Dr. Brian M. Mulrennan's office phone number?
The practice phone on file for Dr. Mulrennan is (608) 775-3176.
What is Dr. Brian M. Mulrennan's medical license number?
Dr. Mulrennan holds Wisconsin license 26840.
What medical group is Dr. Brian M. Mulrennan part of?
Dr. Mulrennan is linked to Gundersen Lutheran Medical Center. Dmand AI links Dr. Mulrennan to 1 more medical group.
Does Dr. Brian M. Mulrennan accept Medicare?
Yes. CMS data shows Dr. Mulrennan billed Medicare for 116 services in 2024.
How many Medicare patients does Dr. Brian M. Mulrennan see?
CMS counts 38 Medicare patients who saw Dr. Mulrennan in 2024, with an average age of 74.
What services does Dr. Brian M. Mulrennan bill to Medicare?
In 2024, Dr. Mulrennan's most billed Medicare services were hospital inpatient care (99231), hospital inpatient care (99232) and hospital inpatient care (99239).
Where did Dr. Brian M. Mulrennan go to medical school?
Dr. Mulrennan graduated from University of Minnesota Medical School in 1984.
What drugs does Dr. Brian M. Mulrennan prescribe most?
In 2023 Medicare Part D data, Dr. Mulrennan's most prescribed drugs by claims were Eliquis, Metoprolol Tartrate and Sertraline HCl.
How long has Dr. Brian M. Mulrennan been practicing?
Dr. Mulrennan graduated from medical school in 1984, 42 years ago.
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