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Alyssa L. O'Brien, PA-C

  • Appleton, WI
  • Surgical physician assistant
NPI1922591742PAC ID4880948587
Part D claims, 2024
111
Hospital affiliations
3
Medical groups
2
State license
1
Year NPI issued
2018
Practice address
1818 N Meade St, Appleton, WI 54911
Practice phone
Call (920) 731-4101
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

ThedaCare Regional Medical Center-Appleton

Hospital · Appleton, Wisconsin

See all 5 affiliations

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Alyssa L. O'Brien is a surgical physician assistant in Appleton, Wisconsin

Alyssa O'Brien practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health.

Alyssa O'Brien's NPI, 1922591742, was assigned on June 7, 2018. Alyssa O'Brien graduated from University of Wisconsin School of Medicine in 2018. Alyssa O'Brien holds Wisconsin license 4374-23.

NPI and contact details
NPI
1922591742NPI Registry (opens in a new tab)
Medicare PAC ID
4880948587
NPI enumeration date
June 7, 2018
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(920) 731-4101
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
34
Medical school graduation
2018

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Alyssa L. O'Brien practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin

Alyssa O'Brien's primary practice is ThedaCare Regional Medical Center-Appleton, at 1818 N Meade St, Appleton, WI 54911 in Outagamie County. The practice phone is (920) 731-4101.

Source: Dmand AI Affiliation Data

Alyssa L. O'Brien is affiliated with 3 sites of care and 2 medical groups

Alyssa O'Brien's primary practice is ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health. Alyssa O'Brien is also affiliated with University Hospital. The medical group on file is UW Health. Dmand AI also links Alyssa O'Brien to 1 more hospital and 1 medical group, each named with a free account.

University HospitalAcute care hospital, Madison, WIUW HealthPrimary care group, Middleton, WI1 hospitalName with a free account1 medical groupName with a free account
See all 5 affiliations for Alyssa O'Brien

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Alyssa L. O'Brien's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Alyssa O'Brien practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
ThedaCare Regional Medical Center-AppletonAvailable with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Alyssa L. O'Brien is one of 249 surgical physician assistants in Wisconsin

Surgical is Alyssa O'Brien's primary specialty in the NPI Registry, under taxonomy code 363AS0400X. Alyssa O'Brien is licensed in Wisconsin.

Specialties and state licenses

  • Surgical physician assistant, WisconsinPrimaryLicense 4374-23 · taxonomy 363AS0400X

Surgical physician assistants near Alyssa O'Brien

Counts of surgical physician assistants with a Dmand AI profile, by place and practice. Each opens the list.

249surgical physician assistants in Wisconsin
9surgical physician assistants in Appleton
2surgical physician assistants at ThedaCare Regional Medical Center-Appleton

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Alyssa L. O'Brien's patients have a median age of 67

Across all payers, Dmand AI patient panel data puts Alyssa O'Brien's median patient age at 67, with 64% women.

Alyssa O'Brien'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

  • Women64%
  • Men36%

Source: Dmand AI Patient Panel Data

Alyssa L. O'Brien wrote 111 Medicare Part D claims in 2024

In 2024, Alyssa O'Brien wrote 111 Medicare Part D claims for 53 patients. 86% of them were for generic drugs.

Part D claims, 2024111
Part D patients53

Alyssa O'Brien's Part D claims by kind of drug, 2024

  • Generic96 claims86%
  • Brand-name15 claims14%

Drug classes CMS tracks in Alyssa O'Brien's Part D claims, 2024

  • Opioids32%35 of 111 claims
  • Antibiotics25%28 of 111 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data

How Alyssa L. O'Brien takes part in Medicare

Alyssa O'Brien accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Alyssa L. O'Brien graduated from University of Wisconsin School of Medicine

Alyssa O'Brien graduated from University of Wisconsin School of Medicine in 2018.

  1. Medical schoolUniversity of Wisconsin School of Medicine

Source: Dmand AI Professional Profile Data

Sources for Alyssa L. O'Brien's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare patients and the all-payer patient panelDmand AI Patient Panel Data
Part D prescribingMedicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Alyssa L. O'Brien

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Alyssa L. O'Brien's NPI number?

Alyssa L. O'Brien's NPI number is 1922591742. It was assigned on June 7, 2018, and it is active in the NPI Registry.

What does Alyssa L. O'Brien specialize in?

Alyssa L. O'Brien is a surgical physician assistant in Appleton, Wisconsin. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).

Where does Alyssa L. O'Brien practice?

Alyssa O'Brien practices at 1818 N Meade St, Appleton, WI 54911. Alyssa O'Brien's primary practice is ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin, part of Froedtert ThedaCare Health. Dmand AI also links Alyssa O'Brien to 1 hospital and 1 medical group.

What is Alyssa L. O'Brien's office phone number?

The practice phone on file for Alyssa O'Brien is (920) 731-4101.

What is Alyssa L. O'Brien's medical license number?

Alyssa O'Brien holds Wisconsin license 4374-23.

Which hospitals is Alyssa L. O'Brien affiliated with?

Alyssa O'Brien practices at ThedaCare Regional Medical Center-Appleton in Appleton, Wisconsin. Alyssa O'Brien is also affiliated with University Hospital. Dmand AI links Alyssa O'Brien to 1 more hospital.

What medical group is Alyssa L. O'Brien part of?

Alyssa O'Brien is linked to UW Health. Dmand AI links Alyssa O'Brien to 1 more medical group.

Does Alyssa L. O'Brien accept Medicare?

Yes. CMS lists Alyssa O'Brien as accepting Medicare assignment.

Where did Alyssa L. O'Brien go to medical school?

Alyssa O'Brien graduated from University of Wisconsin School of Medicine in 2018.

How long has Alyssa L. O'Brien been practicing?

Alyssa O'Brien graduated from medical school in 2018, 8 years ago.

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