MR. MARC P. DIFAZIO M.D.
NPI 1972556462
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology in Rockville, MD
About Mr. Marc P. Difazio M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. MARC P. DIFAZIO M.D. (NPI 1972556462) is an individual neurology with special qualifications in child neurology provider in Rockville, Maryland, licensed in Maryland (D0062946) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1991).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mr. Marc P. Difazio M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Marc Difazio reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 1,417 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20850 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ROCKVILLE, MD 20850
ROCKVILLE, MD 20850
ROCKVILLE, MD 20850
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Marc Difazio's NPI number?
The NPI number for Marc Difazio is 1972556462. It was assigned to this individual provider in the NPPES registry on May 18, 2006.
Where is Marc Difazio located?
Marc Difazio practices at 9715 Medical Center Dr Suite 414, Rockville, MD 20850. The listed phone number is (301) 309-2211.
What is Marc Difazio's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology with Special Qualifications in Child Neurology, with taxonomy code 2084N0402X.
Is Marc Difazio enrolled in Medicare?
Yes. Marc Difazio is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Marc Difazio's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marc Difazio reassigns Medicare benefits to Children's Hospital (Washington, DC). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marc Difazio's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Marc Difazio was last updated on September 18, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mr. Marc P. Difazio, M.D. · NPI 1972556462
Neurology with Special Qualifications in Child Neurology physician in Rockville, Maryland. Individual provider, active in the CMS NPPES registry since May 18, 2006.
## Identity
- **NPI:** 1972556462 (Entity type: Individual)
- **Enumerated:** May 18, 2006
- **Primary specialty:** Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology · taxonomy 2084N0402X
- **State license:** D0062946 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 9715 MEDICAL CENTER DR, SUITE 414, Rockville, MD 20850-3320
- **Phone:** (301) 309-2211
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Children's Hospital (NPI 1780800128, Washington, DC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 1991
## Record status
- **NPPES last updated:** September 18, 2009
- **Other identifiers:** Medicaid 005139000 (MD); Medicaid 010248221 (VA)
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Source: [NPI Profile](https://npiprofile.com/npi/1972556462) · Data from the CMS NPPES public registry.