Harry Loo, M.D.
Ophthalmology Physician · Simi Valley, CA
Harry Loo, M.D. is an ophthalmology physician with a practice address in Simi Valley, California, and NPI 1639219363, issued on Feb 8, 2007. Check the license (California G29817, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Harry Loo
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G29817 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2796 Sycamore Dr, Simi Valley, CA 93065
- Phone
- (805) 522-7955
- Enumerated
- Feb 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 522-8272
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 2796 Sycamore Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Harry Loo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G29817Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Harry Loo among 2,899 ophthalmology physician records in California
Harry Loo, M.D. is one of 2,899 ophthalmology physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 33% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 2,899 in California → Every provider in Simi Valley → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Eric Levine, M.D., PH.D.Simi Valley, CA 930651962525667
- Linda Vannix, M.D.Somis, CA 930661306843925
- Yogender Garg, M.D.Oxnard, CA 930361508870700
- Gregory Spencer, M.D.Oxnard, CA 930361821127770
- Dong Yang, M.D.Oxnard, CA 930361902124076
- Neda Karimi, M.D.Oxnard, CA 930301023161676
- Erick Morales, M.D.Oxnard, CA 930301912094376
- Wei Wan, M.D.Oxnard, CA 930301558414193
Common questions
What is Harry Loo, M.D.'s NPI number?
Harry Loo, M.D.'s National Provider Identifier (NPI) is 1639219363, issued on Feb 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Harry Loo, M.D. located?
The NPPES record lists a practice address at 2796 Sycamore Dr, Simi Valley, CA, 93065. Phone: (805) 522-7955. Providers update this record themselves, so call before visiting.
How can I verify Harry Loo, M.D.'s license?
NPPES lists California license number G29817, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.