Robert L Singer MD and James N Cohn MD
NPI 1902990047 · Ophthalmology Physician · Fremont, CA
Robert L Singer MD and James N Cohn MD is a Ophthalmology Physician organization in Fremont, CA (NPI 1902990047).
Provider details
- NPI number
- 1902990047
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- James Cohn, Partner(510) 791-2233
- License
- G57505 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2006-10-03
- Last updated
- 2008-02-08
Frequently asked questions
- What is Robert L Singer MD and James N Cohn MD's NPI number?
- Robert L Singer MD and James N Cohn MD's National Provider Identifier (NPI) is 1902990047, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Robert L Singer MD and James N Cohn MD?
- Robert L Singer MD and James N Cohn MD is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert L Singer MD and James N Cohn MD located?
- Robert L Singer MD and James N Cohn MD's practice location on file with NPPES is 38024 Martha Ave, Fremont, CA 94536.
- What is Robert L Singer MD and James N Cohn MD's phone number?
- The practice phone number listed in the NPPES registry for Robert L Singer MD and James N Cohn MD is (510) 791-2233.
- Who is the authorized official for Robert L Singer MD and James N Cohn MD?
- The authorized official listed on Robert L Singer MD and James N Cohn MD's NPPES record is James Cohn, Partner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Robert L Singer MD and James N Cohn MD's NPI active?
- Yes — Robert L Singer MD and James N Cohn MD's NPI (1902990047) is active in the NPPES registry as of the last update on 2008-02-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.