NATHANIEL GREGG DENICOLA MD
NPI 1225205651
Obstetrics & Gynecology - Gynecology in Orange, CA
About Nathaniel Gregg Denicola Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHANIEL GREGG DENICOLA MD (NPI 1225205651) is an individual gynecology provider in Orange, California, licensed in California (C170127) and active in the NPI registry since May 2008. He is enrolled in Medicare PECOS, maintains a secondary practice location in Newport Beach, and is a graduate of University Of California, Irvine, California College Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Nathaniel Gregg Denicola Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Nathaniel Denicola reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 149 clinicians in this Medicare group
Yorba Linda, CA 92886
- Reassigned Medicare billing, California enrollment
- 40 clinicians in this Medicare group
Newport Beach, CA 92663
- Reassigned Medicare billing, California enrollment
- 529 clinicians in this Medicare group
Pine Ridge, SD 57770
- Reassigned Medicare billing, Texas enrollment
- 426 clinicians in this Medicare group
Washington, DC 20037
- Reassigned Medicare billing, District of Columbia enrollment
- 1,275 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92868 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ORANGE, CA 92868
ORANGE, CA 92868
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 Nathaniel Denicola's NPI number?
The NPI number for Nathaniel Denicola is 1225205651. It was assigned to this individual provider in the NPPES registry on May 14, 2008.
Where is Nathaniel Denicola located?
Nathaniel Denicola practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-8888.
What is Nathaniel Denicola's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.
Is Nathaniel Denicola enrolled in Medicare?
Yes. Nathaniel Denicola is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Nathaniel Denicola's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Denicola reassigns Medicare benefits to 5 organizations: Regents Of The University Of California (Orange, CA), Caduceus Physicians Medical Group (Yorba Linda, CA), Hoag Clinic (Newport Beach, CA), Pine Ridge Indian Health Service Hospital (Pine Ridge, SD) and Medical Faculty Associates, Inc (Washington, DC). Each 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 Nathaniel Denicola'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 Nathaniel Denicola was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.
# Nathaniel Gregg Denicola, MD · NPI 1225205651
Gynecology physician in Orange, California. Individual provider, active in the CMS NPPES registry since May 14, 2008.
## Identity
- **NPI:** 1225205651 (Entity type: Individual)
- **Enumerated:** May 14, 2008
- **Primary specialty:** Obstetrics & Gynecology - Gynecology · taxonomy 207VG0400X
- **State license:** C170127 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 101 THE CITY DR S, Orange, CA 92868-3201
- **Phone:** (714) 456-8888
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1356304034, Orange, CA); Caduceus Physicians Medical Group (NPI 1497702724, Yorba Linda, CA); Hoag Clinic (NPI 1942799523, Newport Beach, CA); Pine Ridge Indian Health Service Hospital (NPI 1497786412, Pine Ridge, SD); Medical Faculty Associates, Inc (NPI 1417990581, Washington, DC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 2006
## Record status
- **NPPES last updated:** March 24, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1225205651) · Data from the CMS NPPES public registry.