Quick answers
- Does Xian F. Gu accept Medicare assignment?
- Yes. Medicare's clinician data says Xian F. Gu accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Xian F. Gu see?
- In 2024, CMS data shows 461 Original Medicare patients and 1,142 services for Xian F. Gu. This counts Original Medicare only and measures volume, not quality.
- What is Xian F. Gu's NPI number?
- 1811935752. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Xian F. Gu, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 461 |
|---|---|
| Services billed to Medicare | 1,142 |
| Different services or procedures | 33 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)329 services
- Needle measurement of electrical activity in arm or leg muscles, complete study (95886)130 services
- Needle measurement of electrical activity in arm or leg muscles, limited study (95885)76 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)75 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)74 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Anxiety34%
- Depression33%
- Diabetes32%
Hospitals where Xian F. Gu works
Medicare's Facility Affiliation Data lists Xian F. Gu at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Aurora Medical Center OshkoshOshkosh, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520198
- Marshfield Medical Center - Beaver Dam (MMC-BD)Beaver Dam, WI · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 520076
- Ripon Medical CenterRipon, WI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 521321
- SSM Health St Agnes Hospital-Fond Du LacFond Du Lac, WI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 520088
- Waupun Memorial HospitalWaupun, WI · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 521327
Practice locations
Addresses where Xian F. Gu is enrolled with Medicare (CMS data updated October 2, 2026).
- 420 E Division StFond Du Lac, WI 54935 (920) 923‑7400
- 608 W Brown StWaupun, WI 53963 (920) 324‑6800
Group practices
Medicare enrollment lists Xian F. Gu as a member of this group (CMS data updated October 2, 2026).
- Agnesian Healthcare Inc388 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Other clinicians in Agnesian Healthcare Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1811935752 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians