OrganizationActive
Tom S. Chang M.D., Inc.
NPI 1568491827 · Ophthalmology Physician · Pasadena, CA
Tom S. Chang M.D., Inc. is a Ophthalmology Physician organization in Pasadena, CA (NPI 1568491827).
Provider details
- NPI number
- 1568491827
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Adam Martidis, Managing Partner(626) 568-8838
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
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
800 Fairmount Ave
Suite 312
Pasadena, CA 91105-3150
Phone: (626) 568-8838
Fax: (626) 583-8838
Street-level locationGet directions
Mailing address
800 Fairmount Ave
Pasadena, CA 91105-3150
Registry dates
- Enumerated
- 2006-06-30
- Last updated
- 2020-08-22
Frequently asked questions
- What is Tom S. Chang M.D., Inc.'s NPI number?
- Tom S. Chang M.D., Inc.'s National Provider Identifier (NPI) is 1568491827, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Tom S. Chang M.D., Inc.?
- Tom S. Chang M.D., Inc. is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Tom S. Chang M.D., Inc. located?
- Tom S. Chang M.D., Inc.'s practice location on file with NPPES is 800 Fairmount Ave, Pasadena, CA 91105-3150.
- What is Tom S. Chang M.D., Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Tom S. Chang M.D., Inc. is (626) 568-8838.
- Who is the authorized official for Tom S. Chang M.D., Inc.?
- The authorized official listed on Tom S. Chang M.D., Inc.'s NPPES record is Adam Martidis, Managing Partner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Tom S. Chang M.D., Inc.'s NPI active?
- Yes — Tom S. Chang M.D., Inc.'s NPI (1568491827) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.