DR. TABETHA RIDGWAY HARKEN MD, MPH
NPI 1821100983
Obstetrics & Gynecology in Orange, CA
About Dr. Tabetha Ridgway Harken Md, Mph NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TABETHA RIDGWAY HARKEN MD, MPH (NPI 1821100983) is an individual obstetrics & gynecology provider in Orange, California, licensed in California (A95354) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Colorado School Of Medicine, Denver (2002).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Tabetha Ridgway Harken Md, Mph 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
2Medicare enrollment records show Tabetha Harken reassigns Medicare billing to 2 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
Santa Ana, CA 92701
- Reassigned Medicare billing, California enrollment
- 255 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.
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 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ORANGE, CA 92868
ORANGE, CA 92868
ORANGE, CA 92868
ORANGE, CA 92868
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 Tabetha Harken's NPI number?
The NPI number for Tabetha Harken is 1821100983. It was assigned to this individual provider in the NPPES registry on August 31, 2006.
Where is Tabetha Harken located?
Tabetha Harken practices at 200 S. Manchester Ave Suite 600, Orange, CA 92868. The listed phone number is (714) 456-2911.
What is Tabetha Harken's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Tabetha Harken enrolled in Medicare?
Yes. Tabetha Harken 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 Tabetha Harken's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tabetha Harken reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (Orange, CA) and University Of California Irvine (Santa Ana, CA). 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 Tabetha Harken'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 Tabetha Harken was last updated on October 19, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. Tabetha Ridgway Harken, MD, MPH · NPI 1821100983
Obstetrics & Gynecology physician in Orange, California. Individual provider, active in the CMS NPPES registry since August 31, 2006.
## Identity
- **NPI:** 1821100983 (Entity type: Individual)
- **Enumerated:** August 31, 2006
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A95354 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 S. MANCHESTER AVE, SUITE 600, Orange, CA 92868-3217
- **Phone:** (714) 456-2911 · **Fax:** (714) 456-8383
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1356304034, Orange, CA); University Of California Irvine (NPI 1851325906, Santa Ana, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Colorado School Of Medicine, Denver, class of 2002
## Record status
- **NPPES last updated:** October 19, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1821100983) · Data from the CMS NPPES public registry.