BRIAN HASSELFELD M.D.
NPI 1700270360
Internal Medicine in Baltimore, MD
About Brian Hasselfeld M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BRIAN HASSELFELD M.D. (NPI 1700270360) is an individual internal medicine provider in Baltimore, Maryland, licensed in Maryland (D87400) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and maintains a secondary practice location in Boston.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Brian Hasselfeld 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 Brian Hasselfeld reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Baltimore, MD 21287
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1124629837 (Maryland)
- 691 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 4
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins Hospital, The
Acute Care Hospitals · Baltimore, MDJohns Hopkins Bayview Medical Center
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21224 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.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21224
BALTIMORE, MD 21224
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 Brian Hasselfeld's NPI number?
The NPI number for Brian Hasselfeld is 1700270360. It was assigned to this individual provider in the NPPES registry on March 22, 2015.
Where is Brian Hasselfeld located?
Brian Hasselfeld practices at 1501 S Clinton St Ste 200, Baltimore, MD 21224. The listed phone number is (410) 522-9940.
What is Brian Hasselfeld's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Brian Hasselfeld enrolled in Medicare?
Yes. Brian Hasselfeld 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 Brian Hasselfeld's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brian Hasselfeld reassigns Medicare benefits to Johns Hopkins Community Physicians, Inc (Baltimore, MD). 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 Brian Hasselfeld's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Brian Hasselfeld affiliated with any hospitals?
According to CMS data, Brian Hasselfeld is affiliated with Johns Hopkins Hospital, The and Johns Hopkins Bayview Medical Center.
When was this NPI record last updated?
The NPPES record for Brian Hasselfeld was last updated on October 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Brian Hasselfeld, M.D. · NPI 1700270360
Internal Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 22, 2015.
## Identity
- **NPI:** 1700270360 (Entity type: Individual)
- **Enumerated:** March 22, 2015
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** D87400 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 1501 S CLINTON ST STE 200, Baltimore, MD 21224
- **Phone:** (410) 522-9940
## 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:** Johns Hopkins Community Physicians, Inc (NPI 1255359972, Baltimore, MD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tulane University School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** October 5, 2022
---
Source: [NPI Profile](https://npiprofile.com/npi/1700270360) · Data from the CMS NPPES public registry.