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Allan Flach, MD
NPI 1043261134 · Ophthalmology Physician · San Francisco, CA
Allan Flach, MD is a Ophthalmology Physician provider in San Francisco, CA (NPI 1043261134).
Provider details
- NPI number
- 1043261134
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- G23719 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
400 Parnassus Ave
San Francisco, CA 94143-2202
Phone: (415) 353-2800
Street-level locationGet directions
Mailing address
1635 Divisadero Street, Suite 625, Box 1821
San Francisco, CA 94143-0001
Registry dates
- Enumerated
- 2006-05-13
- Last updated
- 2007-07-09
Frequently asked questions
- What is Allan Flach's NPI number?
- Allan Flach's National Provider Identifier (NPI) is 1043261134, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allan Flach's specialty?
- Allan Flach is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Allan Flach located?
- Allan Flach's practice location on file with NPPES is 400 Parnassus Ave, San Francisco, CA 94143-2202.
- What is Allan Flach's phone number?
- The practice phone number listed in the NPPES registry for Allan Flach is (415) 353-2800.
- Is Allan Flach's NPI active?
- Yes — Allan Flach's NPI (1043261134) 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.