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DR. WILLIAM M DEMARCHI MD
NPI 1659353100
Internal Medicine in Boca Raton, FL

Active since November 18, 2005PECOS Enrolled
9878 CLINT MOORE ROAD, SUITE 202, BOCA RATON, FL 33496(561) 451-2454(561) 451-1223 Get Directions Write a Review

NPPES record last updated: August 24, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. William M Demarchi Md NPPES

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

DR. WILLIAM M DEMARCHI MD (NPI 1659353100) is an individual internal medicine provider in Boca Raton, Florida, licensed in Florida (ME73867) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Wakemed, Raleigh Campus, and is a graduate of New York Medical College (1995).

NPPES Registry Identity

NPI1659353100
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. WILLIAM M DEMARCHICredential: MD
Location Address9878 CLINT MOORE ROAD, SUITE 202Boca Raton, FL 33496-1037
Mailing Address9878 Clint Moore Road, Suite 202Boca Raton, FL 33496-1037 · (561) 451-2454 · Fax (561) 451-1223
Phone(561) 451-2454
Fax(561) 451-1223
Sole ProprietorNo
Medical School CMSNew York Medical CollegeGraduated 1995
Enumeration DateNovember 18, 2005
Last NPPES UpdateAugust 24, 2011
✔ NPI 1659353100 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in FL · ME73867
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedFamily Medicine · Adult MedicineTaxonomy 207QA0505X · License ME0073867 (FL)
9878 CLINT MOORE ROAD, Boca Raton, FL 33496
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Other Identifiers 4

Medicare UPING94714FL
Medicare ID-Type Unspecified44248YFL
Medicare PIN44248Y
Medicare UPING94714

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William M Demarchi Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID42249799
PECOS Enrollment IDI20050813000004, I20220822002980
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

4

Medicare enrollment records show William Demarchi reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

M & d Mental Health Inc
45 mi
Mental Health (Including Community Mental Health Center)
2332 GALIANO ST STE 220
Coral Gables, FL 33134
  • Reassigned Medicare billing, Florida enrollment
NPI 1689265753 (786) 935-2713
Post Acute Clinical Services PLLC
612 mi
Family Medicine
620 TOM HUNTER RD
Charlotte, NC 28213
  • Reassigned Medicare billing, North Carolina enrollment
  • 48 clinicians in this Medicare group
NPI 1548061104 (704) 598-5136
Sg Medical Professional PC
1,039 mi
Family Medicine
260 CHRISTOPHER LN STE 102A
Staten Island, NY 10314
  • Reassigned Medicare billing, Florida enrollment
  • 17 clinicians in this Medicare group
NPI 1457085615 (718) 362-1405
Theoria Medical
1,123 mi
Internal Medicine
41800 W 11 MILE RD STE 109
Novi, MI 48375
  • Reassigned Medicare billing, North Carolina enrollment
  • 189 clinicians in this Medicare group
NPI 1609362375 (248) 860-4634

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 10

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.

Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
498 services199 patients
Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306
An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.
192 services171 patients
Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306
An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.
81 services73 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.
76 services76 patients
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.
65 services55 patients
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes 99310
A follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
52 services44 patients

Hospital Affiliations CMS Care Compare

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

Wakemed, Raleigh Campus

Acute Care Hospitals · Raleigh, NC
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number340069
Location3000 New Bern AveRaleigh, NC 27610 · Wake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33496 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
$135.56 typical visit price
range $58.56 – $179.05
Typical copayment $33.89 (range $14.64 – $44.76)
Most-billed visit code 99204
Established Patient
$103.21 typical visit price
range $18.44 – $144.68
Typical copayment $25.80 (range $4.61 – $36.17)
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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
2 suppliers11 claims11 services$62.86 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
2 suppliers31 claims31 services$22.36 avg. paid by Medicare
Elevating leg rests, pair (for use with capped rental wheelchair base) K0195
DME-Wheelchairs · category DD021N
1 supplier13 claims13 services$10.66 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 William Demarchi's NPI number?

The NPI number for William Demarchi is 1659353100. It was assigned to this individual provider in the NPPES registry on November 18, 2005.

Where is William Demarchi located?

William Demarchi practices at 9878 Clint Moore Road Suite 202, Boca Raton, FL 33496. The listed phone number is (561) 451-2454.

What is William Demarchi's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is William Demarchi enrolled in Medicare?

Yes. William Demarchi is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Demarchi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Demarchi reassigns Medicare benefits to 4 organizations: M & d Mental Health Inc (Coral Gables, FL), Post Acute Clinical Services PLLC (Charlotte, NC), Sg Medical Professional PC (Staten Island, NY) and Theoria Medical (Novi, MI). 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 William Demarchi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Demarchi accept?

Health plans from Oscar Health Maintenance Organization of Florida list William Demarchi 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 William Demarchi affiliated with any hospitals?

According to CMS data, William Demarchi is affiliated with Wakemed, Raleigh Campus.

When was this NPI record last updated?

The NPPES record for William Demarchi was last updated on August 24, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.