GEMMA SIAN PAMELA NILSSON
NPI 1790664027
Nurse Anesthetist, Certified Registered in Sacramento, CA
About Gemma Sian Pamela Nilsson NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEMMA SIAN PAMELA NILSSON (NPI 1790664027) is an individual nurse anesthetist, certified registered in Sacramento, California, licensed in Colorado (155583) and active in the NPI registry since August 2025. She is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 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
Gemma Sian Pamela Nilsson 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 Reassignment
Medicare enrollment records show Gemma Nilsson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sacramento, CA 95819
- Reassigned Medicare billing, California enrollment
- 833 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 95819 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 Gemma Nilsson's NPI number?
The NPI number for Gemma Nilsson is 1790664027. It was assigned to this individual provider in the NPPES registry on August 29, 2025. The provider is also known as Gemma Sian Pamela Davies.
Where is Gemma Nilsson located?
Gemma Nilsson practices at 4001 J St, Sacramento, CA 95819. The listed phone number is (916) 453-4545.
What is Gemma Nilsson's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Gemma Nilsson enrolled in Medicare?
Yes. Gemma Nilsson 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 organization bills Medicare for Gemma Nilsson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gemma Nilsson reassigns Medicare benefits to Cep America - Anesthesia PC (Sacramento, 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 Gemma Nilsson'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 Gemma Nilsson was last updated on September 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Gemma Sian Pamela Nilsson · NPI 1790664027
Nurse Anesthetist, Certified Registered physician in Sacramento, California. Individual provider, active in the CMS NPPES registry since August 29, 2025.
## Identity
- **NPI:** 1790664027 (Entity type: Individual)
- **Enumerated:** August 29, 2025
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 155583 (Colorado)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4001 J ST, Sacramento, CA 95819-3626
- **Phone:** (916) 453-4545
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** Cep America - Anesthesia PC (NPI 1770014466, Sacramento, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** September 26, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1790664027) · Data from the CMS NPPES public registry.