John Zack, M.D.
NPI 1629046347 · Ophthalmology Physician · Del Mar, CA
Enrolled with Medicare as Order and Referring Only - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zack, M.D. is a Ophthalmology Physician provider in Del Mar, CA (NPI 1629046347).
Provider details
- NPI number
- 1629046347
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- C28587 (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
- 2006-03-09
- Last updated
- 2007-07-09
Frequently asked questions
- What is John Zack's NPI number?
- John Zack's National Provider Identifier (NPI) is 1629046347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zack's specialty?
- John Zack is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Zack located?
- John Zack's practice location on file with NPPES is 2295 La Amatista Rd, Del Mar, CA 92014-3033.
- What is John Zack's phone number?
- The practice phone number listed in the NPPES registry for John Zack is (858) 755-5797.
- Does John Zack accept Medicare?
- John Zack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zack's NPI active?
- Yes — John Zack's NPI (1629046347) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.