MARY-JANE WILLIAMS M.D.
NPI 1285096032
Internal Medicine - Gastroenterology in Scottsdale, AZ
About Mary-jane Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY-JANE WILLIAMS M.D. (NPI 1285096032) is an individual gastroenterology provider in Scottsdale, Arizona, licensed in Arizona (69010) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Health System - Mankato, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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
Mary-jane Williams M.d. 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
13Medicare enrollment records show Mary-jane Williams reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Scottsdale, AZ 85259
- Reassigned Medicare billing, Arizona enrollment
- 1,792 clinicians in this Medicare group
Tucson, AZ 85704
- Reassigned Medicare billing, Arizona enrollment
- 296 clinicians in this Medicare group
Farmington, NM 87401
- Reassigned Medicare billing, New Mexico enrollment
- 368 clinicians in this Medicare group
Albuquerque, NM 87109
- Reassigned Medicare billing, New Mexico enrollment
- 554 clinicians in this Medicare group
Loveland, CO 80538
- Reassigned Medicare billing, Colorado enrollment
- 2,596 clinicians in this Medicare group
Oklahoma City, OK 73120
- Reassigned Medicare billing, Oklahoma enrollment
- 975 clinicians in this Medicare group
Norfolk, NE 68701
- Reassigned Medicare billing, Nebraska enrollment
- 252 clinicians in this Medicare group
Mankato, MN 56001
- Reassigned Medicare billing, Minnesota enrollment
- 1,572 clinicians in this Medicare group
South Charleston, WV 25309
- Reassigned Medicare billing, West Virginia enrollment
- 466 clinicians in this Medicare group
Wadsworth, OH 44281
- Reassigned Medicare billing, Ohio enrollment
- 661 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.
Areas of Expertise CMS Part B claims 6
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.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic Health System - Mankato
Acute Care Hospitals · Mankato, MNFaith Regional Health Services
Acute Care Hospitals · Norfolk, NEMedina Hospital
Acute Care Hospitals · Medina, OHMercy Hospital Oklahoma City, Inc
Acute Care Hospitals · Oklahoma City, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 85259 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SCOTTSDALE, AZ 85259
SCOTTSDALE, AZ 85259
SCOTTSDALE, AZ 85259
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 Mary-jane Williams's NPI number?
The NPI number for Mary-jane Williams is 1285096032. It was assigned to this individual provider in the NPPES registry on March 22, 2016.
Where is Mary-jane Williams located?
Mary-jane Williams practices at 13400 E Shea Blvd, Scottsdale, AZ 85259. The listed phone number is (480) 301-8000.
What is Mary-jane Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Mary-jane Williams enrolled in Medicare?
Yes. Mary-jane 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 Mary-jane Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary-jane Williams reassigns Medicare benefits to 13 organizations: Mayo Clinic Arizona (Scottsdale, AZ), Northwest Allied Physicians LLC (Tucson, AZ), San Juan Regional Medical Center Inc (Farmington, NM), Southwest Medical Associates, LLC (Albuquerque, NM), Poudre Valley Medical Group, LLC (Loveland, CO) and 8 more organizations, listed in the Medicare section above. 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 Mary-jane Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary-jane Williams accept?
Health plans from Blue Cross and Blue Shield of Nebraska, CareSource, Cigna Healthcare, Highmark Blue Cross Blue Shield West Virginia and Oscar Insurance Company and 2 other insurers list Mary-jane Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mary-jane Williams affiliated with any hospitals?
According to CMS data, Mary-jane Williams is affiliated with Mayo Clinic Health System - Mankato, Faith Regional Health Services, Medina Hospital and Mercy Hospital Oklahoma City, Inc.
When was this NPI record last updated?
The NPPES record for Mary-jane Williams was last updated on July 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Mary-Jane Williams, M.D. · NPI 1285096032
Gastroenterology physician in Scottsdale, Arizona. Individual provider, active in the CMS NPPES registry since March 22, 2016.
## Identity
- **NPI:** 1285096032 (Entity type: Individual)
- **Enumerated:** March 22, 2016
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 69010 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 13400 E SHEA BLVD, Scottsdale, AZ 85259-5499
- **Phone:** (480) 301-8000
## 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:** 13 organizations under Medicare reassignment (form CMS-855R): Mayo Clinic Arizona (NPI 1558332494, Scottsdale, AZ); Northwest Allied Physicians LLC (NPI 1003833179, Tucson, AZ); San Juan Regional Medical Center Inc (NPI 1124262415, Farmington, NM); Southwest Medical Associates, LLC (NPI 1164491072, Albuquerque, NM); Poudre Valley Medical Group, LLC (NPI 1366763260, Loveland, CO); and 8 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** July 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1285096032) · Data from the CMS NPPES public registry.