1. Home
  2. Directory
  3. California
  4. Yreka
  5. Obstetrics Gynecology
  6. NPI Profile

CHRISTAL J DUNCAN MD
NPI 1669476578
Obstetrics & Gynecology in Yreka, CA

Active since June 08, 2005PECOS Enrolled
475 BRUCE ST, YREKA, CA 96097(530) 842-4337(530) 842-9121 Get Directions Write a Review

NPPES record last updated: March 20, 2012. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Christal J Duncan Md NPPES

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

CHRISTAL J DUNCAN MD (NPI 1669476578) is an individual obstetrics & gynecology provider in Yreka, California, licensed in California (G68173) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1669476578
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameCHRISTAL J DUNCANCredential: MD
Location Address475 BRUCE STYreka, CA 96097-3474
Mailing Address475 Bruce StYreka, CA 96097-3474 · (530) 842-4337 · Fax (530) 842-9121
Phone(530) 842-4337
Fax(530) 842-9121
Sole ProprietorNo
Enumeration DateJune 8, 2005
Last NPPES UpdateMarch 20, 2012
✔ NPI 1669476578 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · G68173
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
475 BRUCE ST, Yreka, CA 96097
Open in Google Maps ↗

Other Identifiers 3

Medicare ID-Type Unspecified00G681730CA · Medicare Number
Medicare UPIND05768
Medicaid00G681730CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Christal J Duncan 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 Christal Duncan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Siskiyou Hospital, Inc.
0.1 mi
Critical Access
444 BRUCE ST
Yreka, CA 96097
  • Reassigned Medicare billing, California enrollment
  • 140 clinicians in this Medicare group
NPI 1093892275 (530) 842-4121

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 96097 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
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
Most-billed visit code 99213
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 20

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

JEAN L. WEATHERS R.N. , C.M.W.
Nurse Practitioner (Obstetrics & Gynecology)
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-4337
RICHARD SLARVE M.D.
Family Medicine
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-3507
JON EDWIN MUNDALL MD
Family Medicine
475 BRUCE ST, SUITE 700
YREKA, CA 96097
Siskiyou County (530) 842-4445
MS. CHARDILAINE WHITLOCK FNP-C
Nurse Practitioner (Family)
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-4121
MRS. CHARITY ANN BRADLEY FNP
Nurse Practitioner (Family)
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 841-4980
PETER A. BEORIS MD
Emergency Medicine
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-3507
SISKIYOU HOSPITAL INC
Dental Hygienist
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-3507
JUSTIN HADALLER
Physician Assistant
475 BRUCE ST
YREKA, CA 96097
Siskiyou County (530) 842-4121

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 Christal Duncan's NPI number?

The NPI number for Christal Duncan is 1669476578. It was assigned to this individual provider in the NPPES registry on June 8, 2005.

Where is Christal Duncan located?

Christal Duncan practices at 475 Bruce St, Yreka, CA 96097. The listed phone number is (530) 842-4337.

What is Christal Duncan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Christal Duncan enrolled in Medicare?

Yes. Christal Duncan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Christal Duncan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christal Duncan reassigns Medicare benefits to Siskiyou Hospital, Inc. (Yreka, 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 Christal Duncan'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 Christal Duncan was last updated on March 20, 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.