Jeffrey Nelson, D.O.
NPI 1124099783 · Reproductive Endocrinology Physician · Pasadena, CA
Jeffrey Nelson, D.O. is a Reproductive Endocrinology Physician provider in Pasadena, CA (NPI 1124099783).
Provider details
- NPI number
- 1124099783
- Entity type
- Individual
- Primary specialty
- Reproductive Endocrinology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- License
- 20A6317 (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
- 2006-01-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Jeffrey Nelson's NPI number?
- Jeffrey Nelson's National Provider Identifier (NPI) is 1124099783, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeffrey Nelson's specialty?
- Jeffrey Nelson is listed in the NPPES registry with a primary specialty of Reproductive Endocrinology Physician (Allopathic & Osteopathic Physicians).
- Where is Jeffrey Nelson located?
- Jeffrey Nelson's practice location on file with NPPES is 333 S Arroyo Pkwy, Pasadena, CA 91105-2515.
- What is Jeffrey Nelson's phone number?
- The practice phone number listed in the NPPES registry for Jeffrey Nelson is (626) 440-9161.
- Is Jeffrey Nelson's NPI active?
- Yes — Jeffrey Nelson's NPI (1124099783) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.