Clarence Ly, NP
NPI 1356154595 · Nurse Practitioner · Upland, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clarence Ly, NP is a Nurse Practitioner provider in Upland, CA (NPI 1356154595).
Provider details
- NPI number
- 1356154595
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Male
- Sole proprietor
- Yes
- License
- NP95031960 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 9190 Haven Ave Ste 102Rancho Cucamonga, CA 91730-5431Phone: (909) 981-0989Fax: (909) 948-9110
Registry dates
- Enumerated
- 2025-01-30
- Last updated
- 2025-03-13
- Certified
- 2025-03-13
Frequently asked questions
- What is Clarence Ly's NPI number?
- Clarence Ly's National Provider Identifier (NPI) is 1356154595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clarence Ly's specialty?
- Clarence Ly is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Clarence Ly located?
- Clarence Ly's practice location on file with NPPES is 914 W Foothill Blvd Ste B, Upland, CA 91786-3785.
- What is Clarence Ly's phone number?
- The practice phone number listed in the NPPES registry for Clarence Ly is (909) 982-8944.
- Does Clarence Ly accept Medicare?
- Clarence Ly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clarence Ly's NPI active?
- Yes — Clarence Ly's NPI (1356154595) is active in the NPPES registry as of the last update on 2025-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.