MELISSA MERCADO WITTIG DO
NPI 1821587270
Family Medicine in Paterson, NJ

Q: What is Melissa Mercado Wittig's NPI number?

The NPI number for Melissa Mercado Wittig is 1821587270. It was assigned to this individual provider in the NPPES registry on May 1, 2018.

Q: What is Melissa Mercado Wittig's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Active since May 01, 2018PECOS EnrolledAccepts Medicare Assignment

661 MAIN ST STE 202, PATERSON, NJ 07503(973) 754-4525 Get Directions Write a Review

NPPES record last updated: August 10, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 10, 2026, May 1, 2018 (2 updates tracked since 2018).

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About Melissa Mercado Wittig Do NPPES

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

MELISSA MERCADO WITTIG DO (NPI 1821587270) is an individual family medicine provider in Paterson, New Jersey, licensed in New Jersey (NA) and active in the NPI registry since May 2018. She is enrolled in Medicare PECOS, is affiliated with The University Hospital, and is a graduate of Rutgers R W Johnson Medical School (cam/new Bruns/pisc) (2010).

NPPES Registry Identity

NPI1821587270

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameMELISSA MERCADO WITTIGCredential: DO

Location Address661 MAIN ST STE 202Paterson, NJ 07503-3028

Mailing Address661 Main St Ste 202Paterson, NJ 07503-3028 · (973) 754-4525

Phone(973) 754-4525

Sole ProprietorNo

Medical School CMSRutgers R W Johnson Medical School (cam/new Bruns/pisc)Graduated 2010

Enumeration DateMay 1, 2018

Last NPPES UpdateAugust 10, 20262 updates tracked since enumeration

NPPES CertifiedAugust 10, 2026

✔ NPI 1821587270 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in NJ · NA

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

661 MAIN ST STE 202, Paterson, NJ 07503

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.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

Melissa Mercado Wittig Do 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 ID8820490097

PECOS Enrollment IDI20210709001972

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 Reassignments

Medicare enrollment records show Melissa Mercado Wittig reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Call To Care LLC

9.2 mi

Multi-Specialty

523 PARK AVE
Orange, NJ 07050

Reassigned Medicare billing, New Jersey enrollment
35 clinicians in this Medicare group

NPI 1265063846 (862) 229-1516

North Ward Medical Arts LLC

9.3 mi

Internal Medicine

485-491 MT PROSPECT AVE 1ST FLOOR
Newark, NJ 07104

Reassigned Medicare billing, New Jersey enrollment
47 clinicians in this Medicare group

NPI 1538790563 (973) 485-6433

Metropolitan Medical Group LLC

9.4 mi

Internal Medicine

570 PARK AVE
East Orange, NJ 07017

Reassigned Medicare billing, New Jersey enrollment
46 clinicians in this Medicare group

NPI 1700442415 (862) 766-6608

Salerno Medical Associates, LLC

9.4 mi

Internal Medicine

613 PARK AVE FL 2
East Orange, NJ 07017

Reassigned Medicare billing, New Jersey enrollment
81 clinicians in this Medicare group

NPI 1184766107 (973) 672-8573

Senior Healthcare Outreach Program

9.4 mi

Geriatric Medicine

613 PARK AVE FL 1
East Orange, NJ 07017

Reassigned Medicare billing, New Jersey enrollment
50 clinicians in this Medicare group

NPI 1588707954 (973) 556-0955

Roseville Medical Society LLC

9.8 mi

Internal Medicine

346 ROSEVILLE AVE
Newark, NJ 07107

Reassigned Medicare billing, New Jersey enrollment
53 clinicians in this Medicare group

NPI 1275168320 (973) 482-7245

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 28

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.

252 services113 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

75 services38 patients

Test to measure expiratory airflow and volume changes before and after medication administration 94060

This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.

60 services46 patients

Test to determine lung volumes using gas dilution or washout 94727

This test measures lung volumes by either diluting or washing out a known amount of gas in your lungs. You'll breathe in a harmless gas, then exhale. The exhaled air is analyzed to assess your lung capacity and function.

60 services46 patients

Test to examine how well the lungs exchange gases 94729

This is a test called a pulmonary function test, which helps understand the efficiency of your lungs. It measures how much air your lungs can hold, how quickly you can move air in and out of your lungs, and how well your lungs put oxygen into and remove carbon dioxide from your blood.

60 services46 patients

Blood glucose (sugar) test performed by hand-held instrument 82962

A blood glucose test uses a handheld device to measure the amount of sugar in your blood. A small prick on your finger allows a drop of blood to be placed on a test strip, which is then read by the device. This helps monitor and manage diabetes effectively.

53 services30 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.

46 services31 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.

45 services32 patients

Annual depression screening, 5 to 15 minutes G0444

An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.

41 services41 patients

Annual alcohol misuse screening, 5 to 15 minutes G0442

An annual alcohol misuse screening is a 15-minute check-up to assess your drinking habits. It helps identify if you're consuming alcohol in a way that could harm your health. This is not a judgment, but a tool to promote your wellbeing.

38 services38 patients

Complete ultrasound study of arm and leg arteries 93923

This procedure involves using sound waves to produce images of your arm and leg arteries. It helps identify blockages or abnormalities that could lead to conditions like stroke or peripheral artery disease. It's non-invasive and painless.

29 services29 patients

Smoking and tobacco use intensive counseling, more than 10 minutes 99407

This service involves an in-depth discussion about the risks of smoking and tobacco use, spanning over 10 minutes. It provides personalized strategies to quit smoking, including coping techniques for withdrawal symptoms and triggers. The goal is to support your journey towards a healthier lifestyle.

28 services16 patients

Ultrasound of leg arteries at rest and after exercise 93924

An ultrasound of leg arteries at rest and after exercise involves using sound waves to create images of the blood vessels in your legs. This helps to detect blockages or narrowing. You'll rest, then perform light exercise, and images are taken before and after to compare blood flow.

25 services25 patients

Test to assess balance during warm and cool irrigation in both ears 92537

This is a test called caloric stimulation, used to check your balance function. During this procedure, warm and cool water are gently introduced into your ears. Your eye movements are then observed, as they can indicate issues with balance or inner ear function.

23 services23 patients

Evaluation and testing for balance with recording 92540

This procedure involves a series of evaluations and tests to analyze your balance. Recordings are made to track your performance, helping identify any issues. This aids in determining the best treatment for any balance disorders you may have.

23 services23 patients

Test for abnormal eye movement using a rotating chair 92546

A rotating chair test helps doctors assess balance issues. You'll sit in a motorized chair that spins at controlled speeds. As the chair moves, your eye movements are monitored to identify any irregularities, which can indicate balance disorders.

23 services23 patients

Testing of autonomic nervous system function and heart rate response to deep breathing 95921

This test studies the autonomic nervous system, which controls body functions like heart rate. During the test, you'll breathe deeply while the heart rate is monitored. This helps identify any irregularities in the heart's response to breathing changes.

23 services23 patients

Testing of autonomic (sympathetic) nervous system function 95923

Testing of autonomic nervous system function assesses how well your body's automatic processes, like heart rate and blood pressure, are working. It involves various non-invasive tests like heart rate variability and sweat production tests.

23 services23 patients

Annual, face-to-face intensive behavioral therapy for cardiovascular disease, individual, 15 minutes G0446

This is a yearly, personal consultation focused on behaviors affecting heart health. It lasts 15 minutes and may cover topics like diet, exercise, and stress management. It's about learning healthy habits to protect your heart.

23 services23 patients

Ultrasound study of arm and leg arteries 93922

An ultrasound study of arm and leg arteries is a non-invasive procedure that uses sound waves to create images of your arteries. It helps in checking blood flow, identifying blockages, or detecting other abnormalities in your arteries.

21 services21 patients

Test to measure rate of airflow 94375

This test, known as spirometry, measures how much air you can breathe in and out, and how quickly you can do so. It helps assess your lung function and can be used to diagnose or monitor conditions like asthma or COPD.

21 services21 patients

Test for exercise-induced heart and lung stress 94621

This is a test to evaluate how your heart and lungs respond to physical exertion. You'll exercise on a treadmill or a stationary bike, while your heart rate, breathing, blood pressure, and fatigue levels are monitored. This helps identify any abnormal responses to physical activity.

21 services21 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

17 services17 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

16 services16 patients

Photography of the retina 92250

Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.

14 services13 patients

Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438

An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.

12 services12 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.

11 services11 patients

Administration of influenza virus vaccine G0008

The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.

11 services11 patients

Hospital Affiliations CMS Care Compare

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

The University Hospital

Acute Care Hospitals · Newark, NJ

1/5 CMS rating

OwnershipGovernment - State

CMS Certification Number310119

Location150 Bergen StNewark, NJ 07103 · Essex County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07503 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.

SAHITYA POSIMREDDY M.D.

Internal Medicine (Cardiovascular Disease)

661 MAIN ST STE 202
PATERSON, NJ 07503

Passaic County (973) 321-9845

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 Mercado Wittig's NPI number?

The NPI number for Melissa Mercado Wittig is 1821587270. It was assigned to this individual provider in the NPPES registry on May 1, 2018.

Where is Melissa Mercado Wittig located?

Melissa Mercado Wittig practices at 661 Main St Ste 202, Paterson, NJ 07503. The listed phone number is (973) 754-4525.

What is Melissa Mercado Wittig's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Melissa Mercado Wittig enrolled in Medicare?

Yes. Melissa Mercado Wittig 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 Melissa Mercado Wittig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Mercado Wittig reassigns Medicare benefits to 6 organizations: Call To Care LLC (Orange, NJ), North Ward Medical Arts LLC (Newark, NJ), Metropolitan Medical Group LLC (East Orange, NJ), Salerno Medical Associates, LLC (East Orange, NJ), Senior Healthcare Outreach Program (East Orange, NJ) and 1 more organization, 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 Melissa Mercado Wittig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Melissa Mercado Wittig accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Melissa Mercado Wittig 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 Melissa Mercado Wittig affiliated with any hospitals?

According to CMS data, Melissa Mercado Wittig is affiliated with The University Hospital.

When was this NPI record last updated?

The NPPES record for Melissa Mercado Wittig was last updated on August 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.