Quick answers
- Which hospitals does David D. Nelsen work at?
- Medicare's official clinician data lists David D. Nelsen at 2 hospitals: Javon Bea Hospital and Mercy Health System Corp. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David D. Nelsen see patients?
- Medicare's clinician data lists 4 practice locations, including Woodstock, IL, Janesville, WI and Loves Park, IL. Call before your visit to confirm the address.
- What is David D. Nelsen's specialty?
- Medicare lists Dermatology as the primary specialty.
- Does David D. Nelsen accept Medicare assignment?
- Yes. Medicare's clinician data says David D. Nelsen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for David D. Nelsen?
- (815) 337-7100, as listed in official Medicare / NPI Registry data.
- What is David D. Nelsen's NPI number?
- 1417184169. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David D. Nelsen works
Medicare's Facility Affiliation Data lists David D. Nelsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Javon Bea HospitalRockford, IL · Acute Care Hospital · closed, according to its website · CCN 140239
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
Practice locations
Addresses where David D. Nelsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 2000 Lake AveWoodstock, IL 60098 (815) 337‑7100
- 3524 E Milwaukee StJanesville, WI 53546 (608) 756‑7100
- 7402 E Riverside BlvdLoves Park, IL 61111 (815) 971‑2000
- 8201 E Riverside BlvdRockford, IL 61114 (815) 971‑2000
Group practices
Medicare enrollment lists David D. Nelsen as a member of these groups (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
- Rockford Health Physicians521 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417184169 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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