Michael Lopker, M.D., PH.D.
NPI 1730535998 · Rheumatology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Lopker, M.D., PH.D. is a Rheumatology Physician provider in Chicago, IL (NPI 1730535998).
Provider details
- NPI number
- 1730535998
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- R75552 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 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
520 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) |
|---|---|---|
| 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 | 122 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 89 | $91 |
| 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 | 87 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 62 | $100 |
| 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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Allopurinol | 131 | 39 |
| Hydroxychloroquine Sulfate | 122 | 48 |
| Methotrexate Sodiumbrand: Methotrexate | 96 | 39 |
| Prednisone | 86 | 52 |
| Etanerceptbrand: Enbrel Sureclick | 69 | — |
| Adalimumabbrand: Humira(cf) Pen | 48 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-05-06
- Last updated
- 2019-06-11
Frequently asked questions
- What is Michael Lopker's NPI number?
- Michael Lopker's National Provider Identifier (NPI) is 1730535998, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Lopker's specialty?
- Michael Lopker is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Lopker located?
- Michael Lopker's practice location on file with NPPES is 240 E Huron St, Chicago, IL 60611-2909.
- What is Michael Lopker's phone number?
- The practice phone number listed in the NPPES registry for Michael Lopker is (312) 926-2000.
- Does Michael Lopker accept Medicare?
- Michael Lopker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Lopker's NPI active?
- Yes — Michael Lopker's NPI (1730535998) is active in the NPPES registry as of the last update on 2019-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.