Marc Difazio, M.D.
NPI 1972556462 · Neurology with Special Qualifications in Child Neurology Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Difazio, M.D. is a Neurology with Special Qualifications in Child Neurology Physician provider in Rockville, MD (NPI 1972556462).
Provider details
- NPI number
- 1972556462
- Entity type
- Individual
- Primary specialty
- Neurology with Special Qualifications in Child Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0062946 (MD)
Specialties & taxonomies
- Neurology with Special Qualifications in Child Neurology PhysicianPrimary2084N0402XLicense D0062946 (MD)
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Levetiracetam | 39 |
| Lamotrigine | 36 |
| Oxcarbazepinebrand: Oxtellar Xr | 24 |
| Valproic Acid (as Sodium Salt)brand: Valproic Acid | 17 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 14 |
| Cyproheptadine Hcl | 12 |
| Topiramatebrand: Topiramate Er | 12 |
| Trazodone Hcl | 12 |
| Levocarnitine | 12 |
These counts cover prescriptions paid through Medicare Part D in 2024 — they include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,804 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
- 2006-05-18
- Last updated
- 2009-09-18
Frequently asked questions
- What is Marc Difazio's NPI number?
- Marc Difazio's National Provider Identifier (NPI) is 1972556462, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Difazio's specialty?
- Marc Difazio is listed in the NPPES registry with a primary specialty of Neurology with Special Qualifications in Child Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Difazio located?
- Marc Difazio's practice location on file with NPPES is 9715 Medical Center Dr, Rockville, MD 20850-3320.
- What is Marc Difazio's phone number?
- The practice phone number listed in the NPPES registry for Marc Difazio is (301) 309-2211.
- Does Marc Difazio accept Medicare?
- Marc Difazio is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Difazio's NPI active?
- Yes — Marc Difazio's NPI (1972556462) is active in the NPPES registry as of the last update on 2009-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.