SARA LAUREN GRASSI
NPI 1477015303
Internal Medicine in Baltimore, MD
About Sara Lauren Grassi NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SARA LAUREN GRASSI (NPI 1477015303) is an individual internal medicine provider in Baltimore, Maryland, licensed in Massachusetts (1015018) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Drexel University College Of Medicine (2019).
NPPES Registry Identity
Specialties & Licenses 3
Accepted Insurance
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
Sara Lauren Grassi 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 Sara Grassi reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21287
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1124629837 (Maryland)
- 691 clinicians in this Medicare group
Baltimore, MD 21239
- Reassigned Medicare billing, District of Columbia enrollment
- 3,530 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.
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 21287 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BALTIMORE, MD 21287
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 Sara Grassi's NPI number?
The NPI number for Sara Grassi is 1477015303. It was assigned to this individual provider in the NPPES registry on April 1, 2019.
Where is Sara Grassi located?
Sara Grassi practices at 601 N Caroline St Ste 1261, Baltimore, MD 21287. The listed phone number is (781) 744-8000.
What is Sara Grassi's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Sara Grassi enrolled in Medicare?
Yes. Sara Grassi 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 Sara Grassi's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sara Grassi reassigns Medicare benefits to 2 organizations: Johns Hopkins Community Physicians, Inc (Baltimore, MD) and Medstar Medical Group II LLC (Baltimore, 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 Sara Grassi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sara Grassi accept?
Health plans from Taro Health list Sara Grassi as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Sara Grassi affiliated with any hospitals?
According to CMS data, Sara Grassi is affiliated with Johns Hopkins Hospital, The and Johns Hopkins Bayview Medical Center.
When was this NPI record last updated?
The NPPES record for Sara Grassi was last updated on October 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Sara Lauren Grassi · NPI 1477015303
Internal Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since April 1, 2019.
## Identity
- **NPI:** 1477015303 (Entity type: Individual)
- **Enumerated:** April 1, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 1015018 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 601 N CAROLINE ST STE 1261, Baltimore, MD 21287-0006
- **Phone:** (781) 744-8000
## 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): Johns Hopkins Community Physicians, Inc (NPI 1255359972, Baltimore, MD); Medstar Medical Group II LLC (NPI 1184046187, Baltimore, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Drexel University College Of Medicine, class of 2019
## Record status
- **NPPES last updated:** October 28, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1477015303) · Data from the CMS NPPES public registry.