CHRISTINA BAX
NPI 1659959021
Dermatology in Philadelphia, PA
About Christina Bax NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHRISTINA BAX (NPI 1659959021) is an individual dermatology provider in Philadelphia, Pennsylvania, licensed in Maryland (D0104740) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and maintains a secondary practice location in Baltimore.
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Christina Bax is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Christina Bax reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Belcamp, MD 21017
- Reassigned Medicare billing, Maryland enrollment
- 4,483 clinicians in this Medicare group
Baltimore, MD 21287
- Reassigned Medicare billing, District of Columbia enrollment
- 18 clinicians in this Medicare group
Pleasanton, CA 94588
- Reassigned Medicare billing, California enrollment
- 4,258 clinicians in this Medicare group
Palo Alto, CA 94304
- Reassigned Medicare billing, California enrollment
- 3,617 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Johns Hopkins Hospital, The
Acute Care Hospitals · Baltimore, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19107 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.
PHILADELPHIA, PA 19107
PHILADELPHIA, PA 19107
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 Christina Bax's NPI number?
The NPI number for Christina Bax is 1659959021. It was assigned to this individual provider in the NPPES registry on March 29, 2021.
Where is Christina Bax located?
Christina Bax practices at 800 Spruce St, Philadelphia, PA 19107. The listed phone number is (240) 593-9033.
What is Christina Bax's specialty?
The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.
Is Christina Bax enrolled in Medicare?
Yes. Christina Bax is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Christina Bax's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Christina Bax reassigns Medicare benefits to 4 organizations: Johns Hopkins University (Belcamp, MD), Johns Hopkins University (Baltimore, MD), Stanford Health Care (Pleasanton, CA) and Lpch Medical Group Div Of Lucile (Palo Alto, CA). 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 Christina Bax's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Christina Bax affiliated with any hospitals?
According to CMS data, Christina Bax is affiliated with Johns Hopkins Hospital, The.
When was this NPI record last updated?
The NPPES record for Christina Bax was last updated on December 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Christina Bax · NPI 1659959021
Dermatology physician in Philadelphia, Pennsylvania. Individual provider, active in the CMS NPPES registry since March 29, 2021.
## Identity
- **NPI:** 1659959021 (Entity type: Individual)
- **Enumerated:** March 29, 2021
- **Primary specialty:** Dermatology · taxonomy 207N00000X
- **State license:** D0104740 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 SPRUCE ST, Philadelphia, PA 19107-6130
- **Phone:** (240) 593-9033
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Johns Hopkins University (NPI 1376342774, Belcamp, MD); Johns Hopkins University (NPI 1659377323, Baltimore, MD); Stanford Health Care (NPI 1124561758, Pleasanton, CA); Lpch Medical Group Div Of Lucile (NPI 1417907940, Palo Alto, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2021
## Record status
- **NPPES last updated:** December 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1659959021) · Data from the CMS NPPES public registry.