Erik Underhill, M.D.
NPI 1881767382 · Internal Medicine Physician · Wilmington, DE
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erik Underhill, M.D. is a Internal Medicine Physician provider in Wilmington, DE (NPI 1881767382).
Provider details
- NPI number
- 1881767382
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C1-0006425 (DE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,425 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 454 | $123 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 304 | $15 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 157 | $124 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 106 | $87 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 98 | $18 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 269 | 80 |
| Amlodipine Besylate | 148 | 42 |
| Levothyroxine Sodium | 129 | 37 |
| Rosuvastatin Calcium | 99 | 29 |
| Lisinopril | 53 | 15 |
| Omeprazole | 49 | 15 |
| Tamsulosin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2008-04-04
Frequently asked questions
- What is Erik Underhill's NPI number?
- Erik Underhill's National Provider Identifier (NPI) is 1881767382, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erik Underhill's specialty?
- Erik Underhill is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Erik Underhill located?
- Erik Underhill's practice location on file with NPPES is 1806 N Van Buren Street, Wilmington, DE 19802-3851.
- What is Erik Underhill's phone number?
- The practice phone number listed in the NPPES registry for Erik Underhill is (302) 652-3771.
- Does Erik Underhill accept Medicare?
- Erik Underhill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erik Underhill's NPI active?
- Yes — Erik Underhill's NPI (1881767382) is active in the NPPES registry as of the last update on 2008-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.