Ajay Arumanayagam Selvaraj
NPI 1679068019 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ajay Arumanayagam Selvaraj is a Internal Medicine Physician provider in Chicago, IL (NPI 1679068019).
Provider details
- NPI number
- 1679068019
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 125072866 (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
7 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
696 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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 326 | $158 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 192 | $72 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 71 | $104 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 64 | $46 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 29 | $109 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$72 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
- 2018-06-28
- Last updated
- 2018-06-28
Frequently asked questions
- What is Ajay Arumanayagam Selvaraj's NPI number?
- Ajay Arumanayagam Selvaraj's National Provider Identifier (NPI) is 1679068019, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ajay Arumanayagam Selvaraj's specialty?
- Ajay Arumanayagam Selvaraj is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ajay Arumanayagam Selvaraj located?
- Ajay Arumanayagam Selvaraj's practice location on file with NPPES is 2525 S Michigan Ave, Chicago, IL 60616-2315.
- What is Ajay Arumanayagam Selvaraj's phone number?
- The practice phone number listed in the NPPES registry for Ajay Arumanayagam Selvaraj is (312) 567-2000.
- Does Ajay Arumanayagam Selvaraj accept Medicare?
- Ajay Arumanayagam Selvaraj is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ajay Arumanayagam Selvaraj's NPI active?
- Yes — Ajay Arumanayagam Selvaraj's NPI (1679068019) is active in the NPPES registry as of the last update on 2018-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.