JOHN ROWE HALLSTEN MD
NPI 1821679077
Surgery - Vascular Surgery in La Jolla, CA
About John Rowe Hallsten Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN ROWE HALLSTEN MD (NPI 1821679077) is an individual vascular surgery provider in La Jolla, California, licensed in California (A199281) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, maintains a secondary practice location in La Mesa, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2021).
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 (PECOS)
John Rowe Hallsten Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Hallsten reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 1,437 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92093 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.
LA JOLLA, CA 92093
LA JOLLA, CA 92093
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 John Hallsten's NPI number?
The NPI number for John Hallsten is 1821679077. It was assigned to this individual provider in the NPPES registry on April 19, 2021.
Where is John Hallsten located?
John Hallsten practices at 9500 Gilman Dr, La Jolla, CA 92093. The listed phone number is (858) 657-7404.
What is John Hallsten's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.
Is John Hallsten enrolled in Medicare?
Yes. John Hallsten is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Hallsten's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Hallsten reassigns Medicare benefits to Emergency And Acute Care Medical Corporation (San Diego, CA). 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 John Hallsten's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Hallsten was last updated on July 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# John Rowe Hallsten, MD · NPI 1821679077
Vascular Surgery physician in La Jolla, California. Individual provider, active in the CMS NPPES registry since April 19, 2021.
## Identity
- **NPI:** 1821679077 (Entity type: Individual)
- **Enumerated:** April 19, 2021
- **Primary specialty:** Surgery - Vascular Surgery · taxonomy 2086S0129X
- **State license:** A199281 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 9500 GILMAN DR, La Jolla, CA 92093-5004
- **Phone:** (858) 657-7404
## 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:** Emergency And Acute Care Medical Corporation (NPI 1437103942, San Diego, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 2021
## Record status
- **NPPES last updated:** July 23, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1821679077) · Data from the CMS NPPES public registry.