Marie Dy-Guillaume, MD
NPI 1538123922 · Infectious Disease Physician · Elmhurst, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marie Dy-Guillaume, MD is a Infectious Disease Physician provider in Elmhurst, NY (NPI 1538123922).
Provider details
- NPI number
- 1538123922
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 201321 (NY)
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
20 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
22 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 | 22 | $144 |
Typical Medicare-allowed amounts for these services range $144–$144 (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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 109 | 39 |
| Losartan Potassium | 85 | 28 |
| Atorvastatin Calcium | 74 | 26 |
| Alendronate Sodium | 61 | 23 |
| Empagliflozinbrand: Jardiance | 48 | — |
| Metformin Hcl | 47 | 14 |
| Simvastatin | 38 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-13
- Last updated
- 2010-07-01
Frequently asked questions
- What is Marie Dy-Guillaume's NPI number?
- Marie Dy-Guillaume's National Provider Identifier (NPI) is 1538123922, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marie Dy-Guillaume's specialty?
- Marie Dy-Guillaume is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Marie Dy-Guillaume located?
- Marie Dy-Guillaume's practice location on file with NPPES is 8708 Justice Ave Ste Cs, Elmhurst, NY 11373-8715.
- What is Marie Dy-Guillaume's phone number?
- The practice phone number listed in the NPPES registry for Marie Dy-Guillaume is (718) 779-9599.
- Does Marie Dy-Guillaume accept Medicare?
- Marie Dy-Guillaume is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marie Dy-Guillaume's NPI active?
- Yes — Marie Dy-Guillaume's NPI (1538123922) is active in the NPPES registry as of the last update on 2010-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.