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GREGORY J JOY MD
NPI 1942211651
Internal Medicine in Mission Viejo, CA

Active since August 10, 2006PECOS Enrolled
26991 CROWN VALLEY PKWY, MISSION VIEJO, CA 92691(949) 582-5430(949) 348-9513 Get Directions Write a Review

NPPES record last updated: February 5, 2016. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Gregory J Joy Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY J JOY MD (NPI 1942211651) is an individual internal medicine provider in Mission Viejo, California, licensed in California (G25323) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1942211651
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameGREGORY J JOYCredential: MD
Location Address26991 CROWN VALLEY PKWYMission Viejo, CA 92691-6528
Mailing Address11 Technology DrIrvine, CA 92618-2302 · (949) 923-3277 · Fax (855) 812-5865
Phone(949) 582-5430
Fax(949) 348-9513
Sole ProprietorNo
Enumeration DateAugust 10, 2006
Last NPPES UpdateFebruary 5, 2016
✔ NPI 1942211651 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · G25323
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedEmergency MedicineTaxonomy 207P00000X · License G25323 (CA)
26991 CROWN VALLEY PKWY, Mission Viejo, CA 92691
Open in Google Maps ↗

Other Identifiers 2

Medicare PINCB224267CA
Medicaid00G253230CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory J Joy Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gregory Joy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Knd Development 59 LLC
19 mi
Hospitalist
1901 N COLLEGE AVE
Santa Ana, CA 92706
  • Reassigned Medicare billing, California enrollment
  • 204 clinicians in this Medicare group
NPI 1740519081 (502) 596-7300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92691 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RANDALL VINCENT RICKETTS D.O.
Family Medicine
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-5430
BRISTOL PARK MEDICAL GROUP, INC
Family Medicine
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-2002
DR. MICHAEL F MCCORMACK MD
Emergency Medicine
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-2002
MEMORIALCARE MEDICAL GROUP, INC.
Non-Pharmacy Dispensing Site
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-2002
RONALD D RICHMOND M.D.
Family Medicine
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-5430
MARTHA JEAN GRAY RD
Dietitian, Registered
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-2002
STEFANIE JILL FIGHTLIN DO
Family Medicine
26991 CROWN VALLEY PKWY
MISSION VIEJO, CA 92691
Orange County (949) 582-5430

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Joy's NPI number?

The NPI number for Gregory Joy is 1942211651. It was assigned to this individual provider in the NPPES registry on August 10, 2006.

Where is Gregory Joy located?

Gregory Joy practices at 26991 Crown Valley Pkwy, Mission Viejo, CA 92691. The listed phone number is (949) 582-5430.

What is Gregory Joy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gregory Joy enrolled in Medicare?

Yes. Gregory Joy is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gregory Joy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Joy reassigns Medicare benefits to Knd Development 59 LLC (Santa Ana, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Joy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gregory Joy was last updated on February 5, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.