MRS. MAMIE CHOY WILLIAMS A.R.N.P.
NPI 1386071264
Nurse Practitioner in Roseville, CA

Q: What is Mamie Williams's NPI number?

The NPI number for Mamie Williams is 1386071264. It was assigned to this individual provider in the NPPES registry on October 9, 2013.

Q: What is Mamie Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mamie Williams was last updated on June 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 09, 2013PECOS EnrolledAccepts Medicare Assignment

8 MEDICAL PLAZA DR STE 300, ROSEVILLE, CA 95661(916) 782-5106 Get Directions Write a Review

NPPES record last updated: June 16, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 16, 2025, Jun 18, 2021, May 24, 2018 (3 updates tracked since 2018).

On this page

About Mrs. Mamie Choy Williams A.r.n.p. NPPES

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

MRS. MAMIE CHOY WILLIAMS A.R.N.P. (NPI 1386071264) is an individual nurse practitioner in Roseville, California, licensed in California (95024184) and active in the NPI registry since October 2013. She is enrolled in Medicare PECOS and is a graduate of Other (2015).

NPPES Registry Identity

NPI1386071264

Entity TypeIndividualFemale

Primary Taxonomy363L00000X

Provider Legal NameMRS. MAMIE CHOY WILLIAMSCredential: A.R.N.P.

Location Address8 MEDICAL PLAZA DR STE 300Roseville, CA 95661-3107

Mailing Address8 Medical Plaza Dr Ste 300Roseville, CA 95661-3107 · (916) 782-5106

Phone(916) 782-5106

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateOctober 9, 2013

Last NPPES UpdateJune 16, 20253 updates tracked since enumeration

NPPES CertifiedJune 16, 2025

✔ NPI 1386071264 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

Licenses✔ Licensed in CA · 95024184✔ Licensed in WA · AP60534589

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Also ListedRegistered NurseTaxonomy 163W00000X · License 672922 (NY), 95039332 (CA)

8 MEDICAL PLAZA DR STE 300, Roseville, CA 95661

Open in Google Maps ↗

Other Identifiers 1

Medicaid1386071264WA

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

Mrs. Mamie Choy Williams A.r.n.p. 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 ID4688992472

PECOS Enrollment IDI20230908003530

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

Sutter Medical Foundation

11 mi

Diagnostic Radiology

2800 L ST FL 7
Sacramento, CA 95816

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Sutter Valley Medical Foundation
3,056 clinicians in this Medicare group

NPI 1942524095 (916) 731-7857

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 3

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.

390 services344 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

173 services111 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

59 services58 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95661 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

$92.61 typical visit price

range $60.44 – $180.85

Typical copayment $23.15 (range $15.11 – $45.21)

Most-billed visit code 99203

Established Patient

$105.95 typical visit price

range $19.88 – $148.15

Typical copayment $26.48 (range $4.97 – $37.03)

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 11

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

UMA H GOWDA MD

Internal Medicine (Hematology & Oncology)