John Arpels
NPI 1437229333 · Reproductive Endocrinology Physician · Larkspur, CA
John Arpels is a Reproductive Endocrinology Physician provider in Larkspur, CA (NPI 1437229333).
Provider details
- NPI number
- 1437229333
- Entity type
- Individual
- Primary specialty
- Reproductive Endocrinology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- Yes
- License
- A23861 (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
19 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
- 2006-11-08
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Arpels's NPI number?
- John Arpels's National Provider Identifier (NPI) is 1437229333, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Arpels's specialty?
- John Arpels is listed in the NPPES registry with a primary specialty of Reproductive Endocrinology Physician (Allopathic & Osteopathic Physicians).
- Where is John Arpels located?
- John Arpels's practice location on file with NPPES is 5 Bon Air Rd Ste 109, Larkspur, CA 94939-1137.
- What is John Arpels's phone number?
- The practice phone number listed in the NPPES registry for John Arpels is (415) 924-9444.
- Is John Arpels's NPI active?
- Yes — John Arpels's NPI (1437229333) 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.