Alison Nielsen, MD
NPI 1265536213 · Anesthesiology Physician · Mather, CA
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alison Nielsen, MD is a Anesthesiology Physician provider in Mather, CA (NPI 1265536213).
Provider details
- NPI number
- 1265536213
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 003526 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 2025 Morse AveSacramento, CA 95825-2115Phone: (916) 474-6355
Registry dates
- Enumerated
- 2006-09-11
- Last updated
- 2024-02-15
- Certified
- 2024-02-15
Frequently asked questions
- What is Alison Nielsen's NPI number?
- Alison Nielsen's National Provider Identifier (NPI) is 1265536213, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alison Nielsen's specialty?
- Alison Nielsen is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Alison Nielsen located?
- Alison Nielsen's practice location on file with NPPES is 10535 Hospital Way, Mather, CA 95655.
- What is Alison Nielsen's phone number?
- The practice phone number listed in the NPPES registry for Alison Nielsen is (916) 843-7102.
- Does Alison Nielsen accept Medicare?
- Alison Nielsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alison Nielsen's NPI active?
- Yes — Alison Nielsen's NPI (1265536213) is active in the NPPES registry as of the last update on 2024-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.