Viju John, M.D.
NPI 1831201433 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Viju John, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1831201433).
Provider details
- NPI number
- 1831201433
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
912 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 239 | $132 |
| Remote Monitoring of Physiologic Parameters, Initial Supply of Devices With Daily Recordings Or Programmed Alerts Transmission, Each 30 Days99454 | 140 | $48 |
| Management Using the Results of Remote Vital Sign Monitoring Per Calendar Month, First 20 Minutes99457 | 93 | $50 |
| Hemoglobin A1c Level83036 | 85 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 57 | $94 |
| Administration of Influenza Virus VaccineG0008 | 52 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 261 | 87 |
| Amlodipine Besylate | 230 | 72 |
| Gabapentin | 180 | 53 |
| Lisinopril | 140 | 46 |
| Hydrochlorothiazide | 105 | 37 |
| Metformin Hcl | 103 | 31 |
| Duloxetine Hcl | 101 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2008-02-12
Frequently asked questions
- What is Viju John's NPI number?
- Viju John's National Provider Identifier (NPI) is 1831201433, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Viju John's specialty?
- Viju John is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Viju John located?
- Viju John's practice location on file with NPPES is 1700 W Van Buren St, Chicago, IL 60612-3218.
- What is Viju John's phone number?
- The practice phone number listed in the NPPES registry for Viju John is (312) 563-2875.
- Does Viju John accept Medicare?
- Viju John is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Viju John's NPI active?
- Yes — Viju John's NPI (1831201433) is active in the NPPES registry as of the last update on 2008-02-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.