MRS. MARGARET ESSEX CASTOR WHNP
NPI 1275960585
Nurse Practitioner - Women's Health in Phoenix, AZ

Q: What is Margaret Castor's NPI number?

The NPI number for Margaret Castor is 1275960585. It was assigned to this individual provider in the NPPES registry on October 1, 2013.

Q: What is Margaret Castor's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Women's Health, with taxonomy code 363LW0102X.

Q: When was this NPI record last updated?

The NPPES record for Margaret Castor was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.

Active since October 01, 2013PECOS EnrolledAccepts Medicare Assignment

11209 N TATUM BLVD STE 255, PHOENIX, AZ 85028(602) 494-5050(866) 777-2251 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 4, 2026, May 25, 2021, May 16, 2016 (3 updates tracked since 2016).

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About Mrs. Margaret Essex Castor Whnp NPPES

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

MRS. MARGARET ESSEX CASTOR WHNP (NPI 1275960585) is an individual women's health provider in Phoenix, Arizona, licensed in Arizona (300500) and active in the NPI registry since October 2013. She is enrolled in Medicare PECOS, maintains a secondary practice location in Phoenix, and is a graduate of Vanderbilt University School Of Medicine (2013).

NPPES Registry Identity

NPI1275960585

Entity TypeIndividualFemale

Primary Taxonomy363LW0102X

Provider Legal NameMRS. MARGARET ESSEX CASTORCredential: WHNP

Location Address11209 N TATUM BLVD STE 255Phoenix, AZ 85028-6061

Mailing AddressPo Box 81064Phoenix, AZ 85069-1064 · (602) 494-5050 · Fax (866) 777-2251

Phone(602) 494-5050

Fax(866) 777-2251

Sole ProprietorNo

Medical School CMSVanderbilt University School Of MedicineGraduated 2013

Enumeration DateOctober 1, 2013

Last NPPES UpdateFebruary 4, 20263 updates tracked since enumeration

NPPES CertifiedFebruary 4, 2026

✔ NPI 1275960585 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Women's HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LW0102X

License✔ Licensed in AZ · 300500

Also ListedRegistered NurseTaxonomy 163W00000X · License 300500 (AZ)

11209 N TATUM BLVD STE 255, Phoenix, AZ 85028

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Secondary Practice Location 1

Location 14530 N 32nd St Ste 100Phoenix, AZ 85018-3357 · Phone (602) 468-3912 · Fax (866) 777-2251

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mrs. Margaret Essex Castor Whnp 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 ID3577880954

PECOS Enrollment IDI20240501001723

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.

Areas of Expertise CMS Part B claims 2

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.

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

12 services12 patients

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091

A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85028 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

Most-billed visit code 99214

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 9

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

ALLIE KOSENA WHNP-BC

Nurse Practitioner (Women's Health)