LESLIE GULLAHORN OLSON M.D.
NPI 1427032812
Orthopaedic Surgery in Fresno, CA
About Leslie Gullahorn Olson M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LESLIE GULLAHORN OLSON M.D. (NPI 1427032812) is an individual orthopaedic surgery provider in Fresno, California, licensed in California (A76986) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS, is affiliated with Doctors Hospital, and maintains a secondary practice location in Fairfield.
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Secondary Practice Location 1
Other Identifiers 1
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
Leslie Gullahorn Olson 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
10Medicare enrollment records show Leslie Olson reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Banos, CA 93635
- Reassigned Medicare billing, California enrollment
- 91 clinicians in this Medicare group
Stockton, CA 95204
- Reassigned Medicare billing, California enrollment
- 83 clinicians in this Medicare group
Fairfield, CA 94533
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Northbay Physicians Surgery Center, LLC
- 516 clinicians in this Medicare group
Fairfield, CA 94534
- Reassigned Medicare billing, California enrollment
- 225 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 1,437 clinicians in this Medicare group
Flagstaff, AZ 86001
- Reassigned Medicare billing, Arizona enrollment
- 552 clinicians in this Medicare group
Tacoma, WA 98402
- Reassigned Medicare billing, Washington enrollment
- 1,526 clinicians in this Medicare group
Ligonier, PA 15658
- Reassigned Medicare billing, Pennsylvania enrollment
- 771 clinicians in this Medicare group
Kingston, NY 12401
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Nuvance Health Medical Practice PC
- 638 clinicians in this Medicare group
North Dartmouth, MA 02747
- Reassigned Medicare billing, Georgia enrollment
- 10 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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Doctors Hospital
Acute Care Hospitals · Augusta, GAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93721 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.
FRESNO, CA 93721
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 Leslie Olson's NPI number?
The NPI number for Leslie Olson is 1427032812. It was assigned to this individual provider in the NPPES registry on November 30, 2005. The provider is also known as Leslie Joan Gullahorn.
Where is Leslie Olson located?
Leslie Olson practices at 2823 Fresno St, Fresno, CA 93721. The listed phone number is (559) 459-4004.
What is Leslie Olson's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Leslie Olson enrolled in Medicare?
Yes. Leslie Olson 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 Leslie Olson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Leslie Olson reassigns Medicare benefits to 10 organizations: Surgical Affiliates Of California (Los Banos, CA), Dhp Of California Medical Group Inc (Stockton, CA), Northbay Healthcare Group (Fairfield, CA), Northbay Health Medical Foundation (Fairfield, CA), Emergency And Acute Care Medical Corporation (San Diego, CA) and 5 more organizations, listed in the Medicare section above. 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 Leslie Olson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Leslie Olson accept?
Health plans from Ambetter Health, Blue Cross Blue Shield of Arizona, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Leslie Olson 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 Leslie Olson affiliated with any hospitals?
According to CMS data, Leslie Olson is affiliated with Doctors Hospital.
When was this NPI record last updated?
The NPPES record for Leslie Olson was last updated on May 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Leslie Gullahorn Olson, M.D. · NPI 1427032812
Orthopaedic Surgery physician in Fresno, California. Individual provider, active in the CMS NPPES registry since November 30, 2005.
## Identity
- **NPI:** 1427032812 (Entity type: Individual)
- **Enumerated:** November 30, 2005
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** A76986 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2823 FRESNO ST, Fresno, CA 93721-1324
- **Phone:** (559) 459-4004 · **Fax:** (559) 459-5029
## 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:** 10 organizations under Medicare reassignment (form CMS-855R): Surgical Affiliates Of California (NPI 1932440781, Los Banos, CA); Dhp Of California Medical Group Inc (NPI 1679836084, Stockton, CA); Northbay Healthcare Group (NPI 1821147786, Fairfield, CA); Northbay Health Medical Foundation (NPI 1760283527, Fairfield, CA); Emergency And Acute Care Medical Corporation (NPI 1437103942, San Diego, CA); and 5 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** May 15, 2026
- **Other identifiers:** Medicaid 833146 (AZ)
---
Source: [NPI Profile](https://npiprofile.com/npi/1427032812) · Data from the CMS NPPES public registry.