DR. KAREN ELLIS ESTRADA-STEPHEN MD
NPI 1750812590
Obstetrics & Gynecology in Gilbert, AZ

Q: What is Karen Estrada-stephen's NPI number?

The NPI number for Karen Estrada-stephen is 1750812590. It was assigned to this individual provider in the NPPES registry on March 23, 2017.

Q: What is Karen Estrada-stephen's specialty?

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

Active since March 23, 2017PECOS EnrolledAccepts Medicare Assignment

3370 S MERCY RD STE 314, GILBERT, AZ 85297(480) 782-0993(833) 337-0386 Get Directions Write a Review

NPPES record last updated: April 22, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 22, 2026, Sep 21, 2022, Aug 3, 2021 and 2 more (5 updates tracked since 2017).

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About Dr. Karen Ellis Estrada-stephen Md NPPES

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

DR. KAREN ELLIS ESTRADA-STEPHEN MD (NPI 1750812590) is an individual obstetrics & gynecology provider in Gilbert, Arizona, licensed in Arizona (63168) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, maintains a secondary practice location in Queen Creek, and is a graduate of University Of Wisconsin School Of Medicine (2017).

NPPES Registry Identity

NPI1750812590

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameDR. KAREN ELLIS ESTRADA-STEPHENCredential: MD

Location Address3370 S MERCY RD STE 314Gilbert, AZ 85297-0417

Mailing Address1661 E Camelback Road, Suite 200Phoenix, AZ 85016-3913 · (602) 422-9000 · Fax (602) 556-5951

Phone(480) 782-0993

Fax(833) 337-0386

Sole ProprietorNo

Medical School CMSUniversity Of Wisconsin School Of MedicineGraduated 2017

Enumeration DateMarch 23, 2017

Last NPPES UpdateApril 22, 20265 updates tracked since enumeration

NPPES CertifiedApril 22, 2026

✔ NPI 1750812590 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in AZ · 63168

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.

3370 S MERCY RD STE 314, Gilbert, AZ 85297

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Secondary Practice Location 1

Location 122711 S Ellsworth Rd Ste 104Queen Creek, AZ 85142-6789 · Phone (480) 782-0993 · Fax (833) 337-0386

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter Health, Blue Cross Blue Shield of Arizona and more.Insurance ›

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. Karen Ellis Estrada-stephen 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 ID446522098

PECOS Enrollment IDI20210812002535

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

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

Arizona Ob Gyn Affiliates PC

23 mi

Specialist

1661 E CAMELBACK RD STE 160
Phoenix, AZ 85016

Reassigned Medicare billing, Arizona enrollment
136 clinicians in this Medicare group

NPI 1750589404 (623) 231-3686

Banner - University Physician Specialists LLC

23 mi

Multi-Specialty

17900 N PORTER RD
Maricopa, AZ 85138

Reassigned Medicare billing, Arizona enrollment
553 clinicians in this Medicare group

NPI 1063887727 (520) 233-2500

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85297 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

$127.71 typical visit price

range $55.44 – $168.60

Typical copayment $31.92 (range $13.86 – $42.15)

Most-billed visit code 99204

Established Patient

$69.24 typical visit price

range $17.72 – $137.41

Typical copayment $17.31 (range $4.43 – $34.35)

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 5

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

SHANNON PRITCHETT FNP-C

Nurse Practitioner (Family)