Srinivasan Narayanan, MD, PHD
NPI 1225565229 · Vascular & Interventional Radiology Physician · Mchenry, IL
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Srinivasan Narayanan, MD, PHD is a Vascular & Interventional Radiology Physician provider in Mchenry, IL (NPI 1225565229).
Provider details
- NPI number
- 1225565229
- Entity type
- Individual
- Primary specialty
- Vascular & Interventional Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 036160647 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,750 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 284 | $8 |
| Ct Scan Head Or Brain Without Contrast70450 | 121 | $37 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 121 | $81 |
| X-Ray of Chest, 2 Views71046 | 92 | $10 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 78 | $12 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 77 | $82 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 5 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
Additional practice locations (4)
- 801 S Milwaukee AveLibertyville, IL 60048-3204Phone: (847) 362-2900
- 19801 Observation DrGermantown, MD 20876-4070Phone: (301) 557-6000
- 1500 Forest Glen RdSilver Spring, MD 20910-1460Phone: (301) 754-7000
- 6431 Fannin St # 2.130bHouston, TX 77030-1501Phone: (713) 500-7530
Registry dates
- Enumerated
- 2017-05-22
- Last updated
- 2026-02-26
- Certified
- 2026-02-26
Frequently asked questions
- What is Srinivasan Narayanan's NPI number?
- Srinivasan Narayanan's National Provider Identifier (NPI) is 1225565229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Srinivasan Narayanan's specialty?
- Srinivasan Narayanan is listed in the NPPES registry with a primary specialty of Vascular & Interventional Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Srinivasan Narayanan located?
- Srinivasan Narayanan's practice location on file with NPPES is 4201 W Medical Center Dr, Mchenry, IL 60050-8409.
- What is Srinivasan Narayanan's phone number?
- The practice phone number listed in the NPPES registry for Srinivasan Narayanan is (815) 334-5566.
- Does Srinivasan Narayanan accept Medicare?
- Srinivasan Narayanan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Srinivasan Narayanan's NPI active?
- Yes — Srinivasan Narayanan's NPI (1225565229) is active in the NPPES registry as of the last update on 2026-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.