Mark Vexelman, MD
NPI 1700896750 · Family Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Vexelman, MD is a Family Medicine Physician provider in Chicago, IL (NPI 1700896750).
Provider details
- NPI number
- 1700896750
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036095873 (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
19 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
5,304 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 1,164 | $117 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 656 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 490 | $139 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 473 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 327 | $98 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 246 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,328 | 289 |
| Amlodipine Besylate | 774 | 170 |
| Levothyroxine Sodium | 749 | 137 |
| Metoprolol Succinate | 716 | 142 |
| Apixabanbrand: Eliquis | 597 | 91 |
| Gabapentin | 535 | 94 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$193 across 8 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
- 2006-08-09
- Last updated
- 2008-08-21
Frequently asked questions
- What is Mark Vexelman's NPI number?
- Mark Vexelman's National Provider Identifier (NPI) is 1700896750, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Vexelman's specialty?
- Mark Vexelman is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Vexelman located?
- Mark Vexelman's practice location on file with NPPES is 150 E Huron Street, Chicago, IL 60611-2912.
- What is Mark Vexelman's phone number?
- The practice phone number listed in the NPPES registry for Mark Vexelman is (312) 649-6565.
- Does Mark Vexelman accept Medicare?
- Mark Vexelman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Vexelman's NPI active?
- Yes — Mark Vexelman's NPI (1700896750) is active in the NPPES registry as of the last update on 2008-08-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.