Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MRS. MONA WILLIAMS - GREGORY APN,
NPI 1336244227
Nurse Practitioner - Psychiatric/Mental Health in Edison, NJ

Q: What is Mona Williams - Gregory's NPI number?

The NPI number for Mona Williams - Gregory is 1336244227. It was assigned to this individual provider in the NPPES registry on September 14, 2006.

Q: What is Mona Williams - Gregory's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Active since September 14, 2006PECOS EnrolledAccepts Medicare Assignment

6 KILMER RD UNIT A114, EDISON, NJ 08817(908) 720-9191(845) 999-3661 Get Directions Write a Review

NPPES record last updated: July 19, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

Record update history: Jul 19, 2026, Mar 6, 2026, Nov 16, 2024 (3 updates tracked since 2024).

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About Mrs. Mona Williams - Gregory Apn, NPPES

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

MRS. MONA WILLIAMS - GREGORY APN, (NPI 1336244227) is an individual psychiatric/mental health provider in Edison, New Jersey, licensed in New Jersey (26NJ00112400) and active in the NPI registry since September 2006. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2015).

NPPES Registry Identity

NPI1336244227

Entity TypeIndividualFemale

Primary Taxonomy363LP0808X

Provider Legal NameMRS. MONA WILLIAMS - GREGORYCredential: APN,

Location Address6 KILMER RD UNIT A114Edison, NJ 08817-2432

Mailing Address6 Kilmer Rd Unit A114Edison, NJ 08817-2432 · (908) 720-9191 · Fax (845) 999-3661

Phone(908) 720-9191

Fax(845) 999-3661

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateSeptember 14, 2006

Last NPPES UpdateJuly 19, 20263 updates tracked since enumeration

NPPES CertifiedJuly 19, 2026

✔ NPI 1336244227 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0808X

Licenses✔ Licensed in NJ · 26NJ00112400✔ Licensed in NY · F408532✔ Licensed in PA · SP027974

Also ListedNurse Practitioner · Acute CareTaxonomy 363LA2100X · License 26NJ00112400 (NJ)

6 KILMER RD UNIT A114, Edison, NJ 08817

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Secondary Practice Locations 2

Location 1247 Main StStaten Island, NY 10307-1228 · Phone (908) 720-9191 · Fax (845) 999-3661

Location 21515 Market St Ste 1200Philadelphia, PA 19102-1932 · Phone (908) 720-9191 · Fax (845) 999-3661

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. Mona Williams - Gregory Apn, 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 ID9133213457

PECOS Enrollment IDI20070918000257

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 4

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.

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

514 services218 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

431 services110 patients

Psychiatric diagnostic evaluation with medical services 90792

A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.

73 services71 patients

Psychiatric diagnostic evaluation with medical services 90792

39 services39 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 08817 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

$98.09 typical visit price

range $63.84 – $190.92

Typical copayment $24.52 (range $15.96 – $47.73)

Most-billed visit code 99203

Established Patient

$111.57 typical visit price

range $20.97 – $155.92

Typical copayment $27.89 (range $5.24 – $38.98)

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

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

MWG EDUCATOR AND CLINICIAN LLC

Nurse Practitioner (Psychiatric/Mental Health)

6 KILMER RD UNIT A114
EDISON, NJ 08817

Middlesex County (908) 720-9191

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 Mona Williams - Gregory's NPI number?

The NPI number for Mona Williams - Gregory is 1336244227. It was assigned to this individual provider in the NPPES registry on September 14, 2006.

Where is Mona Williams - Gregory located?

Mona Williams - Gregory practices at 6 Kilmer Rd Unit A114, Edison, NJ 08817. The listed phone number is (908) 720-9191.

What is Mona Williams - Gregory's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Mona Williams - Gregory enrolled in Medicare?

Yes. Mona Williams - Gregory 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.

When was this NPI record last updated?

The NPPES record for Mona Williams - Gregory was last updated on July 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days 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.