Benjamin Heinzen, M.D.
NPI 1083886733 · Internal Medicine Physician · Oshkosh, WI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Benjamin Heinzen, M.D. is a Internal Medicine Physician provider in Oshkosh, WI (NPI 1083886733).
Provider details
- NPI number
- 1083886733
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 55367-020 (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
18 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
1,679 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 | 358 | $114 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 341 | $9 |
| Anticoagulant Management of Patient Taking Warfarin93793 | 211 | $10 |
| Advance Care Planning, First 30 Minutes99497 | 173 | $73 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 158 | $114 |
| 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'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 149 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 945 | 265 |
| Amlodipine Besylate | 655 | 176 |
| Losartan Potassium | 552 | 150 |
| Lisinopril | 483 | 127 |
| Levothyroxine Sodium | 455 | 116 |
| Omeprazole | 453 | 130 |
| Pravastatin Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-01
- Last updated
- 2011-09-16
Frequently asked questions
- What is Benjamin Heinzen's NPI number?
- Benjamin Heinzen's National Provider Identifier (NPI) is 1083886733, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Benjamin Heinzen's specialty?
- Benjamin Heinzen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Benjamin Heinzen located?
- Benjamin Heinzen's practice location on file with NPPES is 1855 S Koeller St, Oshkosh, WI 54902-6214.
- What is Benjamin Heinzen's phone number?
- The practice phone number listed in the NPPES registry for Benjamin Heinzen is (920) 223-7100.
- Does Benjamin Heinzen accept Medicare?
- Benjamin Heinzen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Benjamin Heinzen's NPI active?
- Yes — Benjamin Heinzen's NPI (1083886733) is active in the NPPES registry as of the last update on 2011-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.