Chengwei Peng, MD
NPI 1265813216 · Hematology & Oncology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chengwei Peng, MD is a Hematology & Oncology Physician provider in Chicago, IL (NPI 1265813216).
Provider details
- NPI number
- 1265813216
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 61509 (CT)
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 tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,623 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) |
|---|---|---|
| Injection of Additional New Drug Or Substance Into Vein96375 | 267 | $16 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 234 | $138 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, Each Additional Hour96366 | 146 | $22 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 118 | $195 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 115 | $67 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 110 | $30 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prochlorperazine Maleate | 28 | 20 |
| Ondansetronbrand: Ondansetron Odt | 24 | 15 |
| Oxycodone Hcl | 22 | — |
| Potassium Chloride | 14 | — |
| Dexamethasone | 12 | — |
| Loperamide Hclbrand: Loperamide | 12 | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 789 Howard AvenueYnhh Pcc York St. CampusNew Haven, CT 06511Phone: (203) 688-8300
- 20 York St, Cb-2041New Haven, CT 06510Phone: (203) 688-4748Fax: (203) 688-4740
- 550 1st AveNew York, NY 10016-6402Phone: (212) 263-7300
Registry dates
- Enumerated
- 2015-06-16
- Last updated
- 2023-10-30
- Certified
- 2023-10-30
Frequently asked questions
- What is Chengwei Peng's NPI number?
- Chengwei Peng's National Provider Identifier (NPI) is 1265813216, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chengwei Peng's specialty?
- Chengwei Peng is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Chengwei Peng located?
- Chengwei Peng's practice location on file with NPPES is 676 N Saint Clair St Ste 850, Chicago, IL 60611-3124.
- What is Chengwei Peng's phone number?
- The practice phone number listed in the NPPES registry for Chengwei Peng is (312) 695-6180.
- Does Chengwei Peng accept Medicare?
- Chengwei Peng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chengwei Peng's NPI active?
- Yes — Chengwei Peng's NPI (1265813216) is active in the NPPES registry as of the last update on 2023-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.