1. Home
  2. Directory
  3. Florida
  4. Coral Gables
  5. Otolaryngology
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM MARSHALL PORTNOY M.D.
NPI 1104913185
Otolaryngology - Facial Plastic Surgery in Coral Gables, FL

Active since October 09, 2006PECOS Enrolled
5000 UNIVERSITY DR STE 2200, CORAL GABLES, FL 33146(305) 239-5090(305) 340-3371 Get Directions Write a Review

NPPES record last updated: October 20, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. William Marshall Portnoy M.d. NPPES

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

DR. WILLIAM MARSHALL PORTNOY M.D. (NPI 1104913185) is an individual facial plastic surgery provider in Coral Gables, Florida, licensed in Florida (150098) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Hca Florida Kendall Hospital, and is a graduate of George Washington University School Of Medicine (1987).

NPPES Registry Identity

NPI1104913185
Entity TypeIndividualMale
Primary Taxonomy207YS0123X
Provider Legal NameDR. WILLIAM MARSHALL PORTNOYCredential: M.D.
Location Address5000 UNIVERSITY DR STE 2200Coral Gables, FL 33146-2008
Mailing Address5000 University Dr Ste 2200Miami, FL 33146-2008 · (305) 239-5090 · Fax (305) 340-3371
Phone(305) 239-5090
Fax(305) 340-3371
Sole ProprietorYes
Medical School CMSGeorge Washington University School Of MedicineGraduated 1987
Enumeration DateOctober 9, 2006
Last NPPES UpdateOctober 20, 2026
NPPES CertifiedOctober 20, 2026
✔ NPI 1104913185 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOtolaryngology · Facial Plastic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207YS0123X
License✔ Licensed in FL · 150098
Definition
An otolaryngologist who specializes in facial plastic surgery.
Also ListedOtolaryngology · Otolaryngology/Facial Plastic SurgeryTaxonomy 207YX0905X · License 175480 (NY)
5000 UNIVERSITY DR STE 2200, Coral Gables, FL 33146
Open in Google Maps ↗

Other Identifiers 1

Medicaid01634500NY

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AvMed, Cigna Healthcare, Cigna HealthCare of Florida, Inc. and more.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

Dr. William Marshall Portnoy M.d. 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 ID8628031788
PECOS Enrollment IDI20221115001634
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 Reassignment

Medicare enrollment records show William Portnoy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ent And Allergy Associates Of Florida, LLC
48 mi
Otolaryngology
6421 CONGRESS AVE STE 113
Boca Raton, FL 33487
  • Reassigned Medicare billing, Florida enrollment
  • 211 clinicians in this Medicare group
NPI 1164473120 (561) 338-3267

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 11

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.

Removal of impacted ear wax 69210
Impacted ear wax removal is a safe procedure to clear blockages in the ear canal caused by hardened ear wax. A healthcare professional uses specialized tools or a gentle irrigation method to loosen and remove the wax, improving hearing and alleviating discomfort.
292 services261 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.
199 services157 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.
128 services109 patients
Diagnostic exam of nasal passages using an endoscope 31231
A diagnostic exam of nasal passages using an endoscope is a non-invasive procedure. A small, flexible tube with a light and camera at the end, called an endoscope, is inserted into the nose. This allows the doctor to view the nasal passages and sinuses, helping to identify any issues.
117 services101 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.
114 services114 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
108 services108 patients

Hospital Affiliations CMS Care Compare 3

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

Hca Florida Kendall Hospital

Acute Care Hospitals · Miami, FL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number100209
Location11750 Bird RdMiami, FL 33175 · Miami-Dade County
Emergency services Birthing friendly

Doctors Hospital

Acute Care Hospitals · Coral Gables, FL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number100296
Location5000 University DrCoral Gables, FL 33146 · Miami-Dade County
Emergency services

West Kendall Baptist Hospital

Acute Care Hospitals · Miami, FL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number100314
Location9555 SW 162 AveMiami, FL 33196 · Miami-Dade County
Emergency services Birthing friendly

Other Providers at the Same Location NPPES 6

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

TRICIA LAWRENCE APRN
Nurse Practitioner (Acute Care)
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (305) 779-7381
DR. RUBEN PENARANDA MD
Internal Medicine (Pulmonary Disease)
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (305) 779-7381
DR. BRENDA GONZALEZ
Internal Medicine (Pulmonary Disease)
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (305) 779-7381
BAPTIST HEALTH MEDICAL GROUP PHYSICIANS, LLC
Internal Medicine
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (786) 595-8080
PERCY W AITKEN M.D.
Internal Medicine (Cardiovascular Disease)
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (305) 663-6916
MRS. YVETTE HALL APRN
Nurse Practitioner
5000 UNIVERSITY DR STE 2200
CORAL GABLES, FL 33146
Miami-Dade County (305) 779-7381

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 Portnoy's NPI number?

The NPI number for William Portnoy is 1104913185. It was assigned to this individual provider in the NPPES registry on October 9, 2006.

Where is William Portnoy located?

William Portnoy practices at 5000 University Dr Ste 2200, Coral Gables, FL 33146. The listed phone number is (305) 239-5090.

What is William Portnoy's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Facial Plastic Surgery, with taxonomy code 207YS0123X.

Is William Portnoy enrolled in Medicare?

Yes. William Portnoy 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 organization bills Medicare for William Portnoy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Portnoy reassigns Medicare benefits to Ent And Allergy Associates Of Florida, LLC (Boca Raton, FL). The 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 Portnoy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Portnoy accept?

Health plans from AvMed, Cigna HealthCare of Florida, Inc., Cigna Healthcare, Florida Blue (BlueCross BlueShield FL) and Florida Blue HMO (a BlueCross BlueShield FL company) list William Portnoy 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 Portnoy affiliated with any hospitals?

According to CMS data, William Portnoy is affiliated with Hca Florida Kendall Hospital, Doctors Hospital and West Kendall Baptist Hospital.

When was this NPI record last updated?

The NPPES record for William Portnoy was last updated on October 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.