John Loh, M.D.
NPI 1114197472 · Radiation Oncology Physician · Laguna Woods, CA
John Loh, M.D. is a Radiation Oncology Physician provider in Laguna Woods, CA (NPI 1114197472).
Provider details
- NPI number
- 1114197472
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A36765 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
18 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
- 2008-03-03
- Last updated
- 2022-07-21
Frequently asked questions
- What is John Loh's NPI number?
- John Loh's National Provider Identifier (NPI) is 1114197472, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Loh's specialty?
- John Loh is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is John Loh located?
- John Loh's practice location on file with NPPES is 4009 Calle Sonora Oeste Unit 3e, Laguna Woods, CA 92637-3252.
- What is John Loh's phone number?
- The practice phone number listed in the NPPES registry for John Loh is (315) 491-3997.
- Is John Loh's NPI active?
- Yes — John Loh's NPI (1114197472) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.