Justin Gan, M.D.
NPI 1851549067 · Internal Medicine Physician · Skokie, IL
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Gan, M.D. is a Internal Medicine Physician provider in Skokie, IL (NPI 1851549067).
Provider details
- NPI number
- 1851549067
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 076047 (IL)
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
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,677 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 | 353 | $103 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 335 | $102 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 324 | $17 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 267 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 462 | 122 |
| Hydroxychloroquine Sulfate | 295 | 101 |
| Methotrexate Sodiumbrand: Methotrexate | 221 | 64 |
| Alendronate Sodium | 162 | 45 |
| Gabapentin | 161 | 51 |
| Tizanidine Hcl | 150 | 38 |
| Allopurinol | 135 | 42 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-29
- Last updated
- 2021-03-03
- Certified
- 2021-03-03
Frequently asked questions
- What is Justin Gan's NPI number?
- Justin Gan's National Provider Identifier (NPI) is 1851549067, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Gan's specialty?
- Justin Gan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Gan located?
- Justin Gan's practice location on file with NPPES is 9650 Gross Point Rd Ste 3900, Skokie, IL 60076-5085.
- What is Justin Gan's phone number?
- The practice phone number listed in the NPPES registry for Justin Gan is (847) 570-2503.
- Does Justin Gan accept Medicare?
- Justin Gan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Gan's NPI active?
- Yes — Justin Gan's NPI (1851549067) is active in the NPPES registry as of the last update on 2021-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.