DR. JOSEPH ALEXANDER NELSON M.D.
NPI 1861923617
Internal Medicine - Critical Care Medicine in Baltimore, MD
About Dr. Joseph Alexander Nelson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOSEPH ALEXANDER NELSON M.D. (NPI 1861923617) is an individual critical care medicine provider in Baltimore, Maryland, licensed in Maryland (D0092026) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS, is affiliated with University Of Maryland Medical Center, and maintains a secondary practice location in Brooklyn.
NPPES Registry Identity
Specialties & Licenses 3
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
Dr. Joseph Alexander Nelson 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
3Medicare enrollment records show Joseph Nelson reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Shock Trauma Associates PA
- 541 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- 614 clinicians in this Medicare group
Laurel, MD 20707
- Reassigned Medicare billing, District of Columbia enrollment
- 328 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 2
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.
University Of Maryland Medical Center
Acute Care Hospitals · Baltimore, MDUniversity Of MD Capital Region Medical Center
Acute Care Hospitals · Upper Marlboro, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21201 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.
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 Joseph Nelson's NPI number?
The NPI number for Joseph Nelson is 1861923617. It was assigned to this individual provider in the NPPES registry on March 23, 2017.
Where is Joseph Nelson located?
Joseph Nelson practices at 22 S Greene St # T1r51, Baltimore, MD 21201. The listed phone number is (410) 328-9878.
What is Joseph Nelson's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Joseph Nelson enrolled in Medicare?
Yes. Joseph Nelson 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 Joseph Nelson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Nelson reassigns Medicare benefits to 3 organizations: Shock Trauma Associates, P.A. (Baltimore, MD), University Of Maryland Physicians PA (Baltimore, MD) and Dimensions Healthcare Associates Inc (Laurel, 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 Joseph Nelson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Joseph Nelson affiliated with any hospitals?
According to CMS data, Joseph Nelson is affiliated with University Of Maryland Medical Center and University Of MD Capital Region Medical Center.
When was this NPI record last updated?
The NPPES record for Joseph Nelson was last updated on August 8, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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. Joseph Alexander Nelson, M.D. · NPI 1861923617
Critical Care Medicine physician in Baltimore, Maryland. Individual provider, active in the CMS NPPES registry since March 23, 2017.
## Identity
- **NPI:** 1861923617 (Entity type: Individual)
- **Enumerated:** March 23, 2017
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** D0092026 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 22 S GREENE ST # T1R51, Baltimore, MD 21201-1544
- **Phone:** (410) 328-9878
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Shock Trauma Associates, P.A. (NPI 1679512909, Baltimore, MD); University Of Maryland Physicians PA (NPI 1144270687, Baltimore, MD); Dimensions Healthcare Associates Inc (NPI 1487714168, Laurel, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York University School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** August 8, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1861923617) · Data from the CMS NPPES public registry.