RALPH MAROUN MD
NPI 1982157608
Internal Medicine - Pulmonary Disease in Reston, VA

Active since July 29, 2016PECOS EnrolledAccepts Medicare Assignment
1850 TOWN CENTER PKWY, RESTON, VA 20190(703) 689-9000 Get Directions Write a Review

NPPES record last updated: February 5, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 5, 2026, Feb 19, 2025, Dec 8, 2023 and 1 more (4 updates tracked since 2023).

About Ralph Maroun Md NPPES

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

RALPH MAROUN MD (NPI 1982157608) is an individual pulmonary disease provider in Reston, Virginia, licensed in Tennessee (64455) and active in the NPI registry since July 2016. He is enrolled in Medicare PECOS, is affiliated with Roane Medical Center, and maintains a secondary practice location in Knoxville.

NPPES Registry Identity

NPI1982157608
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameRALPH MAROUNCredential: MD
Location Address1850 TOWN CENTER PKWYReston, VA 20190-3204
Mailing AddressPo Box 207830Dallas, TX 75320-7830 · (888) 412-2649
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateJuly 29, 2016
Last NPPES UpdateFebruary 5, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 5, 2026
NPI 1982157608 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License Licensed in TN · 64455
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 0101287781 (VA)
1850 TOWN CENTER PKWY, Reston, VA 20190

Secondary Practice Location 1

Location 16473 Kingston Pike Ste 6473Knoxville, TN 37919-4832 · Phone (888) 412-2649

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Ralph Maroun Md 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 ID9335478056
PECOS Enrollment IDI20220729001633, I20260107002743
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.

Areas of Expertise CMS Part B claims 22

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
211 services96 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
158 services78 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.
122 services89 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.
117 services63 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.
82 services81 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.
66 services66 patients

Hospital Affiliations CMS Care Compare 5

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

Roane Medical Center

Acute Care Hospitals · Harriman, TN
5/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number440031
Location8045 Roane Medical Center DriveHarriman, TN 37748 · Roane County
Emergency services

Methodist Medical Center Of Oak Ridge

Acute Care Hospitals · Oak Ridge, TN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440034
Location990 Oak Ridge Turnpike Box 529Oak Ridge, TN 37830 · Anderson County
Emergency services Birthing friendly

Fort Sanders Regional Medical Center

Acute Care Hospitals · Knoxville, TN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440125
Location1901 W Clinch AveKnoxville, TN 37916 · Knox County
Emergency services Birthing friendly

Parkwest Medical Center

Acute Care Hospitals · Knoxville, TN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440173
Location9352 Park West BlvdKnoxville, TN 37923 · Knox County
Emergency services Birthing friendly

Reston Hospital Center

Acute Care Hospitals · Reston, VA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490107
Location1850 Town Center ParkwayReston, VA 20190 · Fairfax County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20190 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.

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.

General Practice
1850 TOWN CENTER PKWY
RESTON, VA 20190
Pathology (Anatomic Pathology & Clinical Pathology)
1850 TOWN CENTER PKWY
RESTON, VA 20190
Physical Medicine & Rehabilitation
1850 TOWN CENTER PKWY
RESTON, VA 20190
Occupational Therapist
1850 TOWN CENTER PKWY
RESTON, VA 20190
Emergency Medicine
1850 TOWN CENTER PKWY, RESTON HOSPITAL CENTER
RESTON, VA 20190
Physical Medicine & Rehabilitation
1850 TOWN CENTER PKWY
RESTON, VA 20190
Anesthesiology
1850 TOWN CENTER PKWY, RESTON HOSPITAL CENTER
RESTON, VA 20190
Nurse Anesthetist, Certified Registered
1850 TOWN CENTER PKWY
RESTON, VA 20190

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 Ralph Maroun's NPI number?

The NPI number for Ralph Maroun is 1982157608. It was assigned to this individual provider in the NPPES registry on July 29, 2016.

Where is Ralph Maroun located?

Ralph Maroun practices at 1850 Town Center Pkwy, Reston, VA 20190. The listed phone number is (703) 689-9000.

What is Ralph Maroun's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Ralph Maroun enrolled in Medicare?

Yes. Ralph Maroun 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.

What insurance does Ralph Maroun accept?

Health plans from Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Magnolia Health, Ambetter of Alabama and Ambetter of North Carolina and 3 other insurers list Ralph Maroun 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 Ralph Maroun affiliated with any hospitals?

According to CMS data, Ralph Maroun is affiliated with Roane Medical Center, Methodist Medical Center Of Oak Ridge, Fort Sanders Regional Medical Center, Parkwest Medical Center and Reston Hospital Center.

When was this NPI record last updated?

The NPPES record for Ralph Maroun was last updated on February 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.