James Nickelsen, M.D.
NPI 1891772000 · Allergy & Immunology Physician · Berkeley, CA
James Nickelsen, M.D. is a Allergy & Immunology Physician provider in Berkeley, CA (NPI 1891772000).
Provider details
- NPI number
- 1891772000
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G51329 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2005-12-29
- Last updated
- 2011-12-22
Frequently asked questions
- What is James Nickelsen's NPI number?
- James Nickelsen's National Provider Identifier (NPI) is 1891772000, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Nickelsen's specialty?
- James Nickelsen is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is James Nickelsen located?
- James Nickelsen's practice location on file with NPPES is 3010 Colby St, Berkeley, CA 94705-2091.
- What is James Nickelsen's phone number?
- The practice phone number listed in the NPPES registry for James Nickelsen is (510) 644-2316.
- Is James Nickelsen's NPI active?
- Yes — James Nickelsen's NPI (1891772000) is active in the NPPES registry as of the last update on 2011-12-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.