Zachary Crees, MD
NPI 1225419344 · Medical Oncology Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Crees, MD is a Medical Oncology Physician provider in Saint Louis, MO (NPI 1225419344).
Provider details
- NPI number
- 1225419344
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2017028204 (MO)
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
11 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
1,554 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 361 | $114 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 245 | $123 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 133 | $14 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 130 | $74 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 125 | $119 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Additional Sequential Infusion, 1 Hour Or Less96367 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Valacyclovir Hclbrand: Valacyclovir | 183 | 41 |
| Acyclovir | 140 | 31 |
| Ciprofloxacin Hcl | 124 | 32 |
| Imatinib Mesylate | 82 | — |
| Fluconazole | 81 | 25 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 74 | 18 |
| Ruxolitinib Phosphatebrand: Jakafi | 64 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$9,069 across 4 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
- 2015-06-15
- Last updated
- 2025-04-17
Frequently asked questions
- What is Zachary Crees's NPI number?
- Zachary Crees's National Provider Identifier (NPI) is 1225419344, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Crees's specialty?
- Zachary Crees is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Crees located?
- Zachary Crees's practice location on file with NPPES is 1 Barnes Jewish Hospital Plz, Saint Louis, MO 63110-1003.
- What is Zachary Crees's phone number?
- The practice phone number listed in the NPPES registry for Zachary Crees is (314) 454-8304.
- Does Zachary Crees accept Medicare?
- Zachary Crees is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Crees's NPI active?
- Yes — Zachary Crees's NPI (1225419344) is active in the NPPES registry as of the last update on 2025-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.