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MARNEECE WILLIAMS MD
NPI 1285949412
Obstetrics & Gynecology in Phoenix, AZ

Active since August 12, 2010PECOS Enrolled
635 E BASELINE RD, PHOENIX, AZ 85042(602) 243-7277(602) 243-1235 Get Directions Write a Review

NPPES record last updated: September 9, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Marneece Williams Md NPPES

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

MARNEECE WILLIAMS MD (NPI 1285949412) is an individual obstetrics & gynecology provider in Phoenix, Arizona, licensed in Arizona (49542) and active in the NPI registry since August 2010. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1285949412
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMARNEECE WILLIAMSCredential: MD
Location Address635 E BASELINE RDPhoenix, AZ 85042-6551
Mailing Address3003 N Central Ave Ste 1600Phoenix, AZ 85012-2908 · (602) 323-3344 · Fax (602) 323-3496
Phone(602) 243-7277
Fax(602) 243-1235
Sole ProprietorNo
Enumeration DateAugust 12, 2010
Last NPPES UpdateSeptember 9, 2019
✔ NPI 1285949412 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in AZ · 49542
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.
Also ListedSpecialistTaxonomy 174400000X
635 E BASELINE RD, Phoenix, AZ 85042
Open in Google Maps ↗

Other Identifiers 1

Medicaid927608AZ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc 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 (PECOS)

Marneece Williams 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 Marneece Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

District Medical Group, Inc
6.0 mi
Obstetrics & Gynecology
2525 E ROOSEVELT ST, WOMEN'S CARE CENTER
Phoenix, AZ 85008
  • Reassigned Medicare billing, Arizona enrollment
  • 1,490 clinicians in this Medicare group
NPI 1083947196 (602) 344-5407

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 85042 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 20

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

JENNIE ALTMAN RD
Dietitian, Registered
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277
LAURA LEE RD
Dietitian, Registered
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277
ELAINE TAN PHARM.D.
Pharmacist
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 323-3435
ALTAGRACIA PACHECO MD
Internal Medicine
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277
SIGRID HAZEL D JIMENEZ PHARMD
Pharmacist
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 323-3435
SARAH KIM PHARM.D.
Pharmacist
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277
RHUAN RUDY PSY.D.
Psychologist
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277
KIMBERLY ANN HOFFMAN
Dental Hygienist
635 E BASELINE RD
PHOENIX, AZ 85042
Maricopa County (602) 243-7277

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 Marneece Williams's NPI number?

The NPI number for Marneece Williams is 1285949412. It was assigned to this individual provider in the NPPES registry on August 12, 2010.

Where is Marneece Williams located?

Marneece Williams practices at 635 E Baseline Rd, Phoenix, AZ 85042. The listed phone number is (602) 243-7277.

What is Marneece Williams's specialty?

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

Is Marneece Williams enrolled in Medicare?

Yes. Marneece Williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marneece Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marneece Williams reassigns Medicare benefits to District Medical Group, Inc (Phoenix, AZ). 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 Marneece Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marneece Williams accept?

Health plans from Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Imperial Insurance Companies, Inc. list Marneece 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.

When was this NPI record last updated?

The NPPES record for Marneece Williams was last updated on September 9, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.