DR. HASSAN A. NASSER M.D.
NPI 1912961665
Internal Medicine in Baltimore, MD
About Dr. Hassan A. Nasser M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HASSAN A. NASSER M.D. (NPI 1912961665) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D0053617) and active in the NPI registry since April 2006. He is enrolled in Medicare PECOS, is affiliated with Medstar Franklin Square Medical Center, and is a graduate of Other (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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
Dr. Hassan A. Nasser 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 Reassignments
2Medicare enrollment records show Hassan Nasser reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21239
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- 3,530 clinicians in this Medicare group
Frederick, MD 21701
- Reassigned Medicare billing, District of Columbia enrollment
- 204 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.
Areas of Expertise CMS Part B claims 10
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Medstar Franklin Square Medical Center
Acute Care Hospitals · Rosedale, MDMedstar Union Memorial Hospital
Acute Care Hospitals · Baltimore, MDMedstar Good Samaritan Hospital
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21218 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 7
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
BALTIMORE, MD 21218
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 Hassan Nasser's NPI number?
The NPI number for Hassan Nasser is 1912961665. It was assigned to this individual provider in the NPPES registry on April 12, 2006.
Where is Hassan Nasser located?
Hassan Nasser practices at 200 E 33rd St Suite 650, Baltimore, MD 21218. The listed phone number is (410) 554-6740.
What is Hassan Nasser's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Hassan Nasser enrolled in Medicare?
Yes. Hassan Nasser 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 organizations bill Medicare for Hassan Nasser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Hassan Nasser reassigns Medicare benefits to 2 organizations: Medstar Medical Group II LLC (Baltimore, MD) and Hospitalist Medicine Physicians Of Maryland PC (Frederick, MD). Each 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 Hassan Nasser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Hassan Nasser affiliated with any hospitals?
According to CMS data, Hassan Nasser is affiliated with Medstar Franklin Square Medical Center, Medstar Union Memorial Hospital and Medstar Good Samaritan Hospital.
When was this NPI record last updated?
The NPPES record for Hassan Nasser was last updated on April 25, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Dr. Hassan A. Nasser, M.D. · NPI 1912961665
Internal Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since April 12, 2006.
## Identity
- **NPI:** 1912961665 (Entity type: Individual)
- **Enumerated:** April 12, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D0053617 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 E 33RD ST, SUITE 650, Baltimore, MD 21218-3322
- **Phone:** (410) 554-6740
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group II LLC (NPI 1184046187, Baltimore, MD); Hospitalist Medicine Physicians Of Maryland PC (NPI 1992945471, Frederick, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** April 25, 2016
- **Other identifiers:** Medicare UPIN G74406
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Source: [NPI Profile](https://npiprofile.com/npi/1912961665) · Data from the CMS NPPES public registry.