1. Home
  2. Directory
  3. District Of Columbia
  4. Washington
  5. Hospitalist
  6. NPI Profile

GHASSAN ILAIWY M.D.
NPI 1588059752
Hospitalist in Washington, DC

Active since April 03, 2015PECOS EnrolledAccepts Medicare Assignment
110 IRVING ST NW, DEPARTMENT OF INTERNAL MEDICINE, WASHINGTON, DC 20010(202) 877-2835(202) 877-8288 Get Directions Write a Review

NPPES record last updated: January 31, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 16, 2020, Jul 2, 2018 (2 updates tracked since 2018).

About Ghassan Ilaiwy M.d. NPPES

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

GHASSAN ILAIWY M.D. (NPI 1588059752) is an individual hospitalist provider in Washington, District Of Columbia, licensed in Virginia (0101263994) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with Mary Washington Hospital, and is a graduate of Other (2013).

NPPES Registry Identity

NPI1588059752
Entity TypeIndividualMale
Primary Taxonomy208M00000X
Provider Legal NameGHASSAN ILAIWYCredential: M.D.
Location Address110 IRVING ST NW, DEPARTMENT OF INTERNAL MEDICINEWashington, DC 20010
Mailing Address2300 Fall Hill Ave Ste 515Fredericksburg, VA 22401-3371 · (540) 741-0543 · Fax (540) 741-0546
Phone(202) 877-2835
Fax(202) 877-8288
Sole ProprietorYes
Medical School CMSOtherGraduated 2013
Enumeration DateApril 3, 2015
Last NPPES UpdateJanuary 31, 20242 updates tracked since enumeration
NPPES CertifiedJanuary 31, 2024
✔ NPI 1588059752 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians
Taxonomy Code208M00000X
License✔ Licensed in VA · 0101263994
Definition
Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.
Also ListedInternal MedicineTaxonomy 207R00000X · License 0101263994 (VA)
110 IRVING ST NW, Washington, DC 20010
Open in Google Maps ↗

Other Names 1

Other Name (5)Ghassan Ilaiwy Md

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

Ghassan Ilaiwy 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 ID6103180203
PECOS Enrollment IDI20180425001780, I20240212004378
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

2

Medicare enrollment records show Ghassan Ilaiwy reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Emergency Medicine Associates PA PC
6.6 mi
Emergency Medicine
1701 N GEORGE MASON DR
Arlington, VA 22205
  • Reassigned Medicare billing, District of Columbia and Virginia enrollments
  • Medicare enrollment name: Emergency Medicine Associates P.A., P.C.
  • Also billed through NPI 1134117393 (Virginia)
  • 1,150 clinicians in this Medicare group
NPI 1588529887 (330) 493-4443
Mary Washington Healthcare Providers LLC
50 mi
Hospitalist
1001 SAM PERRY BLVD
Fredericksburg, VA 22401
  • Reassigned Medicare billing, Virginia enrollment
  • 323 clinicians in this Medicare group
NPI 1750826277 (540) 741-1821

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 3

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.

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
77 services77 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
37 services37 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

Mary Washington Hospital

Acute Care Hospitals · Fredericksburg, VA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490022
Location1001 Sam Perry BoulevardFredericksburg, VA 22401 · Fredericksburg City County
Emergency services Birthing friendly

Inova Alexandria Hospital

Acute Care Hospitals · Alexandria, VA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490040
Location4320 Seminary RdAlexandria, VA 22304 · Alexandria City County
Emergency services Birthing friendly

Inova Fairfax Hospital

Acute Care Hospitals · Falls Church, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490063
Location3300 Gallows RoadFalls Church, VA 22042 · Fairfax County
Emergency services Birthing friendly

Inova Mount Vernon Hospital

Acute Care Hospitals · Alexandria, VA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490122
Location2501 Parkers LaneAlexandria, VA 22306 · Fairfax County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20010 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
87%120 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 20

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

MS. JANET E JUMPER N.P.
Nurse Practitioner (Acute Care)
110 IRVING ST NW, 4B42
WASHINGTON, DC 20010
District of Columbia (202) 877-7462
EMILY JEAN SIEGEL MD
Student in an Organized Health Care Education/Training Program
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (202) 877-8080
KIMBERLY SMITH
Radiology (Diagnostic Radiology)
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (301) 902-1073
MISS ORE-OLUWA ODULANA LIMA DA SILVA CRNA
Nurse Anesthetist, Certified Registered
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (202) 877-7504
DR. FAY HORNG M.D.
Anesthesiology
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (202) 877-7504
DR. MICHAEL B SHVARTS MD
Radiology (Diagnostic Radiology)
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (202) 877-7000
DR. SCOTT THOMAS MARTYNA D.M.D.
Student in an Organized Health Care Education/Training Program
110 IRVING ST NW, DEPT. OF ORAL AND MAXILLOFACIAL SURGERY
WASHINGTON, DC 20010
District of Columbia (202) 877-7332
MS. NOOR-UL-HUDA AMER MEHDI M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
110 IRVING ST NW
WASHINGTON, DC 20010
District of Columbia (202) 877-7000

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 Ghassan Ilaiwy's NPI number?

The NPI number for Ghassan Ilaiwy is 1588059752. It was assigned to this individual provider in the NPPES registry on April 3, 2015. The provider is also known as Ghassan Ilaiwy MD.

Where is Ghassan Ilaiwy located?

Ghassan Ilaiwy practices at 110 Irving St NW Department Of Internal Medicine, Washington, DC 20010. The listed phone number is (202) 877-2835.

What is Ghassan Ilaiwy's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Ghassan Ilaiwy enrolled in Medicare?

Yes. Ghassan Ilaiwy 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 Ghassan Ilaiwy's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ghassan Ilaiwy reassigns Medicare benefits to 2 organizations: Emergency Medicine Associates PA PC (Arlington, VA) and Mary Washington Healthcare Providers LLC (Fredericksburg, VA). 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 Ghassan Ilaiwy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Ghassan Ilaiwy affiliated with any hospitals?

According to CMS data, Ghassan Ilaiwy is affiliated with Mary Washington Hospital, Inova Alexandria Hospital, Inova Fairfax Hospital and Inova Mount Vernon Hospital.

When was this NPI record last updated?

The NPPES record for Ghassan Ilaiwy was last updated on January 31, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.