Darren Heesacker, MD
NPI 1013953561 · Emergency Medicine Physician · Oshkosh, WI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Darren Heesacker, MD is a Emergency Medicine Physician provider in Oshkosh, WI (NPI 1013953561).
Provider details
- NPI number
- 1013953561
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36486 (WI)
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
20 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
317 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 147 | $155 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 78 | $107 |
| Critical Care, First 30-74 Minutes99291 | 34 | $195 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 21 | $65 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 19 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 52 | 52 |
| Ciprofloxacin Hcl | 30 | 29 |
| Cephalexin | 29 | 29 |
| Diclofenac Sodium | 27 | 27 |
| Methylprednisolone | 27 | 26 |
| Prednisone | 25 | 25 |
| Tramadol Hcl | 25 | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-22
- Last updated
- 2026-04-21
- Certified
- 2026-04-21
Frequently asked questions
- What is Darren Heesacker's NPI number?
- Darren Heesacker's National Provider Identifier (NPI) is 1013953561, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Darren Heesacker's specialty?
- Darren Heesacker is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Darren Heesacker located?
- Darren Heesacker's practice location on file with NPPES is 855 N Westhaven Dr, Oshkosh, WI 54904-7668.
- What is Darren Heesacker's phone number?
- The practice phone number listed in the NPPES registry for Darren Heesacker is (920) 288-4060.
- Does Darren Heesacker accept Medicare?
- Darren Heesacker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Darren Heesacker's NPI active?
- Yes — Darren Heesacker's NPI (1013953561) is active in the NPPES registry as of the last update on 2026-04-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.