Neilayan Sen, M.D.
NPI 1407101314 · Radiation Oncology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Neilayan Sen, M.D. is a Radiation Oncology Physician provider in Chicago, IL (NPI 1407101314).
Provider details
- NPI number
- 1407101314
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 125.061125 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 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
2,048 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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 666 | $39 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 242 | $165 |
| Design and Construction of Complex Radiation Treatment Device77334 | 197 | $52 |
| Calculation of Radiation Therapy Dose77300 | 195 | $28 |
| Intra-Fraction Localization and Tracking of Target Or Patient Motion During Delivery of Radiation Therapy (eg,3d Positional Tracking, Gating, 3d Surface Tracking), Each Fraction of TreatmentG6017 | 122 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 121 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 70 | 33 |
| Oxycodone Hcl | 32 | 16 |
| Dexamethasone | 27 | 25 |
| Nystatin | 26 | 19 |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 22 | — |
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 no Part D record, 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (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
- 2012-07-17
- Last updated
- 2012-07-17
Frequently asked questions
- What is Neilayan Sen's NPI number?
- Neilayan Sen's National Provider Identifier (NPI) is 1407101314, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Neilayan Sen's specialty?
- Neilayan Sen is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Neilayan Sen located?
- Neilayan Sen's practice location on file with NPPES is 1653 W Congress Pkwy, Chicago, IL 60612-3833.
- What is Neilayan Sen's phone number?
- The practice phone number listed in the NPPES registry for Neilayan Sen is (312) 942-5000.
- Does Neilayan Sen accept Medicare?
- Neilayan Sen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Neilayan Sen's NPI active?
- Yes — Neilayan Sen's NPI (1407101314) is active in the NPPES registry as of the last update on 2012-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.