1. Home
  2. Directory
  3. Colorado
  4. Castle Rock
  5. Obstetrics Gynecology
  6. NPI Profile

KIERSTEN WILSON WILLIAMS MD
NPI 1710944731
Obstetrics & Gynecology in Castle Rock, CO

Active since April 26, 2006PECOS EnrolledAccepts Medicare Assignment
2350 MEADOWS BLVD, CASTLE ROCK, CO 80109(720) 455-0350(720) 455-0351 Get Directions Write a Review

NPPES record last updated: August 20, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Kiersten Wilson Williams Md NPPES

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

KIERSTEN WILSON WILLIAMS MD (NPI 1710944731) is an individual obstetrics & gynecology provider in Castle Rock, Colorado, licensed in Colorado (DR.40673) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS and is a graduate of Eastern Virginia Medical School (1998).

NPPES Registry Identity

NPI1710944731
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameKIERSTEN WILSON WILLIAMSCredential: MD
Location Address2350 MEADOWS BLVDCastle Rock, CO 80109-8405
Mailing Address2350 Meadows BlvdCastle Rock, CO 80109-8405 · (720) 455-0350 · Fax (720) 455-0351
Phone(720) 455-0350
Fax(720) 455-0351
Sole ProprietorNo
Medical School CMSEastern Virginia Medical SchoolGraduated 1998
Enumeration DateApril 26, 2006
Last NPPES UpdateAugust 20, 2025
NPPES CertifiedAugust 20, 2025
✔ NPI 1710944731 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CO · DR.40673
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.
2350 MEADOWS BLVD, Castle Rock, CO 80109
Open in Google Maps ↗

Other Identifiers 5

Medicaid200739380AKS
Medicaid1710944731MT
Medicaid10025711400NE
Medicaid76876331CO
Medicaid1710944731WY

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

Kiersten Wilson Williams 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.

PECOS PAC ID1456438571
PECOS Enrollment IDI20080414000189
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 Reassignments

2

Medicare enrollment records show Kiersten Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Portercare Adventist Health System
Same address
Hospitalist
2350 MEADOWS BLVD
Castle Rock, CO 80109
  • Reassigned Medicare billing, Colorado enrollment
  • 733 clinicians in this Medicare group
NPI 1073955787 (720) 455-0650
Obstetrix Medical Group Of Colorado P C
24 mi
Neonatal-Perinatal Medicine
1719 E 19TH AVE
Denver, CO 80218
  • Reassigned Medicare billing, Colorado enrollment
  • 118 clinicians in this Medicare group
NPI 1700983103 (303) 839-6000

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 80109 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
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
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.

USACS OF COLORADO INC
Emergency Medicine
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (330) 493-4443
KATHERINE GASSER
Registered Nurse
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-5000
SHERIDAN CHILDRENS HEALTHCARE SERVICES OF COLORADO PC
Pediatrics (Neonatal-Perinatal Medicine)
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-5000
STUART VIRGIL WEATHERWAX MD
Obstetrics & Gynecology
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-0350
PORTERCARE ADVENTIST HEALTH SYSTEM
Hospitalist
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-0650
HEALTHONE CLINIC SERVICES - PEDIATRIC SPECIALTIES LLC
Pediatrics (Pediatric Cardiology)
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 475-8730
HUGH E HALLMARK MD
Hospitalist
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-3879
DR. ROY G BERGSTROM MD
Obstetrics & Gynecology
2350 MEADOWS BLVD
CASTLE ROCK, CO 80109
Douglas County (720) 455-0350

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 Kiersten Williams's NPI number?

The NPI number for Kiersten Williams is 1710944731. It was assigned to this individual provider in the NPPES registry on April 26, 2006.

Where is Kiersten Williams located?

Kiersten Williams practices at 2350 Meadows Blvd, Castle Rock, CO 80109. The listed phone number is (720) 455-0350.

What is Kiersten Williams's specialty?

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

Is Kiersten Williams enrolled in Medicare?

Yes. Kiersten Williams 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 Kiersten Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Kiersten Williams reassigns Medicare benefits to 2 organizations: Portercare Adventist Health System (Castle Rock, CO) and Obstetrix Medical Group Of Colorado P C (Denver, CO). 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 Kiersten Williams'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 Kiersten Williams was last updated on August 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.