Mariam Khan, MD
NPI 1225317464 · Rheumatology Physician · Elmhurst, IL
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mariam Khan, MD is a Rheumatology Physician provider in Elmhurst, IL (NPI 1225317464).
Provider details
- NPI number
- 1225317464
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036146687 (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
14 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
1,166 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 438 | $135 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 243 | $15 |
| 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 | 214 | $17 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 70 | $178 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 50 | $85 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 497 | 173 |
| Methotrexate Sodiumbrand: Methotrexate | 412 | 127 |
| Hydroxychloroquine Sulfate | 267 | 95 |
| Allopurinol | 159 | 55 |
| Leflunomide | 108 | 41 |
| Methylprednisolone | 88 | 74 |
| Adalimumabbrand: Humira(cf) Pen | 85 | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$138 across 6 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
- 2011-08-05
- Last updated
- 2021-06-14
- Certified
- 2021-06-14
Frequently asked questions
- What is Mariam Khan's NPI number?
- Mariam Khan's National Provider Identifier (NPI) is 1225317464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariam Khan's specialty?
- Mariam Khan is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mariam Khan located?
- Mariam Khan's practice location on file with NPPES is 1200 S York St Ste 2000, Elmhurst, IL 60126-5634.
- What is Mariam Khan's phone number?
- The practice phone number listed in the NPPES registry for Mariam Khan is (331) 221-9199.
- Does Mariam Khan accept Medicare?
- Mariam Khan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mariam Khan's NPI active?
- Yes — Mariam Khan's NPI (1225317464) is active in the NPPES registry as of the last update on 2021-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.