WILLIAM JAMES MESNARD MD
NPI 1467559617
Internal Medicine - Rheumatology in Millburn, NJ

NPI Status: Active since September 20, 2006

Contact Information

116 MILLBURN AVE
MILLBURN, NJ
ZIP 07041
Phone: (973) 375-2545
Fax: (973) 467-4207

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  • Individual
  • Male
  • Internal Medicine
  • Rheumatology
  • PECOS Enrolled

About WILLIAM MESNARD

This page provides the complete NPI Profile along with additional information for William Mesnard, an internist established in Millburn, New Jersey with a medical specialization in Internal Medicine, focusing in rheumatology . The healthcare provider is registered in the NPI registry with number 1467559617 assigned on September 2006. The practitioner's primary taxonomy code is 207RR0500X with license number MA46581 (NJ). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1467559617
Provider Name
WILLIAM JAMES MESNARD MD
Gender
Male
Entity Type
Individual
Location Address
116 MILLBURN AVE MILLBURN, NJ 07041
Location Phone
(973) 375-2545
Location Fax
(973) 467-4207
Mailing Address
116 MILLBURN AVE MILLBURN, NJ 07041
Mailing Phone
(973) 375-2545
Mailing Fax
(973) 467-4207
Is Sole Proprietor?
No
Enumeration Date
09-20-2006
Last Update Date
09-11-2025
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An internist like William Mesnard is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine Rheumatology

Taxonomy Code
207RR0500X
Type
Allopathic & Osteopathic Physicians
License No.
MA46581
License State
NJ
Taxonomy Description
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207R00000XAllopathic & Osteopathic Physicians

Internal Medicine

MA46581 (NJ)

Medicare Participation & PECOS Enrollment Status

William Mesnard is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Aspiration and/or injection of fluid from large joint

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

This service was performed 40 times for 18 patients

Aspiration and/or injection of fluid from medium joint

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

This service was performed 36 times for 20 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 60 times for 44 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 269 times for 114 patients

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

This service was performed 57 times for 34 patients

Insertion of needle into vein for collection of blood sample

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

This service was performed 43 times for 33 patients

New patient office or other outpatient visit, 60-74 minutes

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.

This service was performed 26 times for 26 patients

Red blood cell sedimentation rate, to detect inflammation, non-automated

The Red Blood Cell Sedimentation Rate test measures how quickly red blood cells settle at the bottom of a test tube. If they settle faster than normal, it may indicate inflammation in the body. This test is non-automated, meaning it's manually performed by a lab technician.

This service was performed 39 times for 29 patients

Physician Visit Costs

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 07041 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $144.86
  • Minimum New Patient Price $63.84
  • Maximum New Patient Price $190.92
  • Average New Patient Copayment $36.21
  • Minimum New Patient Copayment $15.96
  • Maximum New Patient Copayment $47.73

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $111.57
  • Minimum Established Patient Price $20.97
  • Maximum Established Patient Price $155.92
  • Average Established Patient Copayment $27.89
  • Minimum Established Patient Copayment $5.24
  • Maximum Established Patient Copayment $38.98

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1467559617, we treat the final digit (7) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 63. The final step is to find the difference between that total and the next multiple of ten (70 - 63 = 7).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
4
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
7
Unchanged
Pos 5
5
Doubled → 10 → 1 + 0
Pos 6
5
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
6
Unchanged
Pos 9
1
Doubled → 2
Check
7
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 6 → 12 → 3 5 → 10 → 1 9 → 18 → 9 1 → 2

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 4 + 1 + 2 + 7 + 1 + 0 + 5 + 1 + 8 + 6 + 2 + 24 = 63

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 63 is 70. The difference is the calculated check digit.

70 - 63 = 7
This NPI is valid
The calculated check digit is 7, which matches the last digit of 1467559617.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Internal Medicine (Gastroenterology)
116 MILLBURN AVE, SUITE 211
MILLBURN, NJ 07041
Internal Medicine
116 MILLBURN AVE, SUITE # 108
MILLBURN, NJ 07041
Specialist
116 MILLBURN AVE
MILLBURN, NJ 07041
Dentist (Periodontics)
116 MILLBURN AVE, SUITE 204
MILLBURN, NJ 07041
Specialist
116 MILLBURN AVE, SUITE 207
MILLBURN, NJ 07041
Internal Medicine (Gastroenterology)
116 MILLBURN AVE, SUITE # 214
MILLBURN, NJ 07041
Dentist
116 MILLBURN AVE, SUITE 210
MILLBURN, NJ 07041
Internal Medicine
116 MILLBURN AVE, SUITE 108
MILLBURN, NJ 07041
Dentist (General Practice)
116 MILLBURN AVE, SUITE 113
MILLBURN, NJ 07041
Dentist (Orthodontics and Dentofacial Orthopedics)
116 MILLBURN AVE, SUITE 202
MILLBURN, NJ 07041
Dentist
116 MILLBURN AVE, SUITE 109
MILLBURN, NJ 07041
Internal Medicine (Cardiovascular Disease)
116 MILLBURN AVE, SUITE 213
MILLBURN, NJ 07041
Internal Medicine (Cardiovascular Disease)
116 MILLBURN AVE, SUITE 214
MILLBURN, NJ 07041
Clinic/Center (Dental)
116 MILLBURN AVE, SUITE 109
MILLBURN, NJ 07041
Internal Medicine (Gastroenterology)
116 MILLBURN AVE, SUITE 214
MILLBURN, NJ 07041
Dentist
116 MILLBURN AVE, SUITE 215
MILLBURN, NJ 07041
Dentist
116 MILLBURN AVE, SUITE 215
MILLBURN, NJ 07041
Dermatology (Procedural Dermatology)
116 MILLBURN AVE, SUITE 111
MILLBURN, NJ 07041
Specialist
116 MILLBURN AVE, SUITE 207
MILLBURN, NJ 07041

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1467559617, enumerated as an "individual" on September 20, 2006.

The provider is located at 116 MILLBURN AVE MILLBURN, NJ 07041 and the phone number is (973) 375-2545.

Internal Medicine with taxonomy code 207RR0500X and a focus in Rheumatology.