MS. MELISSA ALMEIDA WILLIAMS CNP
NPI 1356934871
Nurse Practitioner - Family in Medfield, MA

Q: What is Melissa Williams's NPI number?

The NPI number for Melissa Williams is 1356934871. It was assigned to this individual provider in the NPPES registry on February 16, 2021.

Q: What is Melissa Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Q: When was this NPI record last updated?

The NPPES record for Melissa Williams was last updated on February 13, 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 February 16, 2021PECOS Enrolled

266 MAIN ST STE 4, MEDFIELD, MA 02052(508) 359-8141 Get Directions Write a Review

NPPES record last updated: February 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 13, 2025, Jan 3, 2025, Nov 29, 2021 and 3 more (6 updates tracked since 2021).

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About Ms. Melissa Almeida Williams Cnp NPPES

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

MS. MELISSA ALMEIDA WILLIAMS CNP (NPI 1356934871) is an individual family provider in Medfield, Massachusetts, licensed in Massachusetts (2324739) and active in the NPI registry since February 2021. She is enrolled in Medicare PECOS, is affiliated with Newton-wellesley Hospital, and is a graduate of Other (2021).

NPPES Registry Identity

NPI1356934871

Entity TypeIndividualFemale

Primary Taxonomy363LF0000X

Provider Legal NameMS. MELISSA ALMEIDA WILLIAMSCredential: CNP

Location Address266 MAIN ST STE 4Medfield, MA 02052-2018

Mailing Address286 Washington StStoughton, MA 02072-1763

Phone(508) 359-8141

Sole ProprietorNo

Medical School CMSOtherGraduated 2021

Enumeration DateFebruary 16, 2021

Last NPPES UpdateFebruary 13, 20266 updates tracked since enumeration

NPPES CertifiedFebruary 13, 2026

✔ NPI 1356934871 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LF0000X

License✔ Licensed in MA · 2324739

Also ListedRegistered NurseTaxonomy 163W00000X · License RN2324739 (MA)

266 MAIN ST STE 4, Medfield, MA 02052

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Other Identifiers 3

OtherRN2324739MA · Cnp

OtherRN2324739MA · Massachusetts Rn

Other2324739MA · Rn

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Melissa Almeida Williams Cnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3375934706

PECOS Enrollment IDI20211220001162

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 16

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.

271 services241 patients

Detection test by immunoassay with direct visual observation for influenza virus 87804

This is a test that identifies the influenza virus in your body. It works by using an immunoassay, a method that detects the presence of the virus through an immune response. The results are directly observable, making it a quick and efficient way to diagnose flu.

259 services125 patients

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

180 services17 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

119 services119 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

92 services87 patients

Amplifed dna or rna probe detection of severe acute respiratory syndrome coronavirus 2 (covid-19) antigen 87635

This is a lab test that detects the presence of COVID-19 in your body. It uses a technique to amplify the virus's genetic material, either DNA or RNA, making it easier to identify. A positive result indicates an active infection.

76 services75 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus 87426

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

68 services68 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

62 services59 patients

Detection test by immunoassay with direct visual observation for respiratory syncytial virus 87807

This is a test to identify the respiratory syncytial virus, a common cause of lung and respiratory tract infections. It uses immunoassay, a method that detects the virus through a reaction between the virus and specific antibodies. The result is visually observed.

49 services48 patients

Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) 87880

A detection test by immunoassay for Group A Strep is a quick procedure to identify a bacterial infection in your throat. It involves taking a throat swab and applying it to a test strip, which changes color if Strep bacteria are present.

48 services47 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.

34 services31 patients

Inhalation treatment for airway obstruction or sputum production 94640

Inhalation treatment, also known as nebulizer therapy, helps clear airway obstructions and reduce sputum production. It involves breathing in medication through a device, turning it into a mist. This can open up the airways, making breathing easier and helping to cough out mucus.

29 services18 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

28 services22 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

23 services21 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.

22 services20 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

15 services15 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Newton-Wellesley Hospital

Acute Care Hospitals · Newton, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220101

Location2014 Washington StreetNewton, MA 02462 · Middlesex County

Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02052 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

$97.64 typical visit price

range $63.72 – $189.86

Typical copayment $24.41 (range $15.93 – $47.46)

Most-billed visit code 99203

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

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 4

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

MEDFIELD INTERNAL MEDICINE, PLLC

Internal Medicine

266 MAIN ST STE 4
MEDFIELD, MA 02052

Norfolk County (508) 359-8141

LIANE P HELLAND NP

Nurse Practitioner (Family)

266 MAIN ST STE 4
MEDFIELD, MA 02052

Norfolk County (508) 359-8141

RUSSELL KLING MD

Internal Medicine

266 MAIN ST STE 4
MEDFIELD, MA 02052

Norfolk County (508) 359-8151

JULIE CEDRONE REGISTERED NURSE NP

Nurse Practitioner (Family)

266 MAIN ST STE 4
MEDFIELD, MA 02052

Norfolk County (508) 359-8141

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 Melissa Williams's NPI number?

The NPI number for Melissa Williams is 1356934871. It was assigned to this individual provider in the NPPES registry on February 16, 2021.

Where is Melissa Williams located?

Melissa Williams practices at 266 Main St Ste 4, Medfield, MA 02052. The listed phone number is (508) 359-8141.

What is Melissa Williams's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Melissa Williams enrolled in Medicare?

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

Is Melissa Williams affiliated with any hospitals?

According to CMS data, Melissa Williams is affiliated with Newton-Wellesley Hospital and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Melissa Williams was last updated on February 13, 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.