Gregory Joy, MD
NPI 1942211651 · Internal Medicine Physician · Mission Viejo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Joy, MD is a Internal Medicine Physician provider in Mission Viejo, CA (NPI 1942211651).
Provider details
- NPI number
- 1942211651
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G25323 (CA)
Specialties & taxonomies
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
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
Mailing address
Registry dates
- Enumerated
- 2006-08-10
- Last updated
- 2016-02-05
Frequently asked questions
- What is Gregory Joy's NPI number?
- Gregory Joy's National Provider Identifier (NPI) is 1942211651, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Joy's specialty?
- Gregory Joy is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Joy located?
- Gregory Joy's practice location on file with NPPES is 26991 Crown Valley Pkwy, Mission Viejo, CA 92691-6528.
- What is Gregory Joy's phone number?
- The practice phone number listed in the NPPES registry for Gregory Joy is (949) 582-5430.
- Does Gregory Joy accept Medicare?
- Gregory Joy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Joy's NPI active?
- Yes — Gregory Joy's NPI (1942211651) is active in the NPPES registry as of the last update on 2016-02-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.