Dr. Harry Loo, M.D.
Dr. Harry Loo is a Ophthalmology Physician provider (Ophthalmology) practicing in Simi Valley, CA, registered in the NPPES registry with NPI 1639219363 since 2007. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1639219363 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Harry Loo |
| Credential | M.D. |
| Sex | Male |
| Practice address | Simi Valley, CA, 93065 |
| Phone | 8055227955 |
| Fax | 8055228272 |
| Enumeration date | 2007-02-08 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207W00000X | Ophthalmology Physician | Primary | G29817 | CA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: Harry Loo, M.D. NPI: 1639219363 Taxonomy: 207W00000X (Ophthalmology Physician) Address: Simi Valley, CA, 93065
Other providers at this practice address
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|---|---|---|---|---|
| 1972547446 | Steven Kaminsky | Individual | Periodontics | Simi Valley, CA |
| 1104985357 | Sunset Sleep Labs LLC | Organization | Clinical Medical Laboratory | Simi Valley, CA |
| 1336208453 | Richard Bruckner | Individual | Oral and Maxillofacial Surgery (Dentist) | Simi Valley, CA |
| 1407987134 | Steven Parle | Individual | Orthodontics and Dentofacial Orthopedics Dentistry | Simi Valley, CA |
| 1245636034 | S Tenggren Dental Corp | Organization | General Practice Dentistry | Simi Valley, CA |
Verify this record
Cross-check NPI 1639219363 against the authoritative CMS record: view Dr. Harry Loo on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.