MS. ALLEGRA JACQUELINE HAMMAN CRNP
NPI 1104049063
Nurse Practitioner in Lutherville Timonium, MD
About Ms. Allegra Jacqueline Hamman Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. ALLEGRA JACQUELINE HAMMAN CRNP (NPI 1104049063) is an individual nurse practitioner in Lutherville Timonium, Maryland, licensed in Maryland (R109043) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Other (1985).
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Ms. Allegra Jacqueline Hamman Crnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Allegra Hamman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lutherville, MD 21093
- Reassigned Medicare billing, Maryland and District of Columbia enrollments
- Also billed through NPI 1255359972 (District of Columbia)
- 952 clinicians in this Medicare group
Lutherville, MD 21093
- Reassigned Medicare billing, Maryland enrollment
- 4,483 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 21093 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.
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 Allegra Hamman's NPI number?
The NPI number for Allegra Hamman is 1104049063. It was assigned to this individual provider in the NPPES registry on April 10, 2007.
Where is Allegra Hamman located?
Allegra Hamman practices at 10753 Falls Rd Johns Hopkins At Green Spring Suite 315, Lutherville Timonium, MD 21093. The listed phone number is (410) 583-2926.
What is Allegra Hamman's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Allegra Hamman enrolled in Medicare?
Yes. Allegra Hamman is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Allegra Hamman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Allegra Hamman reassigns Medicare benefits to 2 organizations: Johns Hopkins Community Physicians (Lutherville, MD) and Johns Hopkins University (Lutherville, 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 Allegra Hamman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Allegra Hamman affiliated with any hospitals?
According to CMS data, Allegra Hamman is affiliated with Johns Hopkins Hospital, The and Johns Hopkins Bayview Medical Center.
When was this NPI record last updated?
The NPPES record for Allegra Hamman was last updated on July 23, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Ms. Allegra Jacqueline Hamman, CRNP · NPI 1104049063
Nurse Practitioner physician in Lutherville Timonium, Maryland. Individual provider, active in the CMS NPPES registry since April 10, 2007.
## Identity
- **NPI:** 1104049063 (Entity type: Individual)
- **Enumerated:** April 10, 2007
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** R109043 (Maryland)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 10753 FALLS RD, JOHNS HOPKINS AT GREEN SPRING SUITE 315, Lutherville Timonium, MD 21093-4535
- **Phone:** (410) 583-2926 · **Fax:** (410) 583-2883
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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 (NPI 1144041203, Lutherville, MD); Johns Hopkins University (NPI 1255315339, Lutherville, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1985
## Record status
- **NPPES last updated:** July 23, 2013
- **Other identifiers:** Medicaid 570039600 (MD); Medicare PIN 206695Y82 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1104049063) · Data from the CMS NPPES public registry.