Margaret Dauphin-Van Dyk, M.D.
NPI 1801852926 · Specialist · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Dauphin-Van Dyk, M.D. is a Specialist provider in Chicago, IL (NPI 1801852926).
Provider details
- NPI number
- 1801852926
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 036059705 (IL)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
157 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 | 103 | $132 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 54 | $9 |
Typical Medicare-allowed amounts for these services range $9–$132 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 185 | 26 |
| Amlodipine Besylate | 176 | 32 |
| Metoprolol Succinate | 157 | 27 |
| Furosemide | 142 | 19 |
| Simvastatin | 126 | 23 |
| Losartan Potassium | 105 | 15 |
| Metformin Hcl | 89 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (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
- 2006-04-26
- Last updated
- 2022-08-31
- Certified
- 2022-08-31
Frequently asked questions
- What is Margaret Dauphin-Van Dyk's NPI number?
- Margaret Dauphin-Van Dyk's National Provider Identifier (NPI) is 1801852926, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Dauphin-Van Dyk's specialty?
- Margaret Dauphin-Van Dyk is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Margaret Dauphin-Van Dyk located?
- Margaret Dauphin-Van Dyk's practice location on file with NPPES is 2800 N Sheridan Rd Ste 406, Chicago, IL 60657-6158.
- What is Margaret Dauphin-Van Dyk's phone number?
- The practice phone number listed in the NPPES registry for Margaret Dauphin-Van Dyk is (312) 201-0044.
- Does Margaret Dauphin-Van Dyk accept Medicare?
- Margaret Dauphin-Van Dyk is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Dauphin-Van Dyk's NPI active?
- Yes — Margaret Dauphin-Van Dyk's NPI (1801852926) is active in the NPPES registry as of the last update on 2022-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.