John Zimmermann, M.D.
NPI 1740221225 · Medical Oncology Physician · Palmer, AK
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zimmermann, M.D. is a Medical Oncology Physician provider in Palmer, AK (NPI 1740221225).
Provider details
- NPI number
- 1740221225
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 7196 (AK)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
5,102 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 663 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 527 | $10 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 361 | $125 |
| Intensity Modulated Treatment Delivery, Single Or Multiple Fields/Arcs,via Narrow Spatially and Temporally Modulated Beams, Binary, Dynamic Mlc, Per Treatment SessionG6015 | 345 | $348 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 | 342 | $27 |
| Insertion of Needle Into Vein for Collection of Blood Sample |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 92 | 15 |
| Ondansetronbrand: Ondansetron Odt | 35 | 19 |
| Letrozole | 33 | — |
| Oxycodone Hcl | 29 | 14 |
| Dexamethasone | 28 | 19 |
| Enzalutamidebrand: Xtandi | 25 | — |
| Zolpidem Tartrate | 23 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,563 across 27 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-08
- Last updated
- 2013-12-31
Frequently asked questions
- What is John Zimmermann's NPI number?
- John Zimmermann's National Provider Identifier (NPI) is 1740221225, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zimmermann's specialty?
- John Zimmermann is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Zimmermann located?
- John Zimmermann's practice location on file with NPPES is 2490 S Woodworth Loop, Palmer, AK 99645-7405.
- What is John Zimmermann's phone number?
- The practice phone number listed in the NPPES registry for John Zimmermann is (907) 746-7771.
- Does John Zimmermann accept Medicare?
- John Zimmermann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zimmermann's NPI active?
- Yes — John Zimmermann's NPI (1740221225) is active in the NPPES registry as of the last update on 2013-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.