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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MR. MARWAN MASSOUH MD
NPI 1508841669
Internal Medicine - Hematology & Oncology in Westlake, OH

Active since December 13, 2005PECOS Enrolled
29101 HEALTH CAMPUS DR, SUITE 260, WESTLAKE, OH 44145(440) 808-6500(440) 808-8865 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Mr. Marwan Massouh Md NPPES

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

MR. MARWAN MASSOUH MD (NPI 1508841669) is an individual hematology & oncology provider in Westlake, Ohio, licensed in Ohio (35056179) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with St James Healthcare, and is a graduate of Other (1982).

NPPES Registry Identity

NPI1508841669
Entity TypeIndividualMale
Primary Taxonomy207RH0003X
Provider Legal NameMR. MARWAN MASSOUHCredential: MD
Location Address29101 HEALTH CAMPUS DR, SUITE 260Westlake, OH 44145-5270
Mailing Address29101 Health Campus Dr, Suite 260Westlake, OH 44145-5270 · (440) 808-6500 · Fax (440) 808-8865
Phone(440) 808-6500
Fax(440) 808-8865
Sole ProprietorNo
Medical School CMSOtherGraduated 1982
Enumeration DateDecember 13, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1508841669 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in OH · 35056179
Definition

An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.

29101 HEALTH CAMPUS DR, Westlake, OH 44145
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Other Identifiers 2

Other000000212199OH · Anthem
Medicaid0848382OH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, Providence Health Plan.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

Mr. Marwan Massouh 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 ID6709785702
PECOS Enrollment IDI20150921002541
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 4

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.

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.
976 services312 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.
73 services73 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
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.
15 services15 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.
11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

St James Healthcare

Acute Care Hospitals · Butte, MT
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number270017
Location400 S Clark StButte, MT 59701 · Silver Bow County
Emergency services Birthing friendly

Community Medical Center

Acute Care Hospitals · Missoula, MT
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number270023
Location2827 Fort Missoula RdMissoula, MT 59804 · Missoula County
Emergency services Birthing friendly

Deer Lodge Medical Center

Critical Access Hospitals · Deer Lodge, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271314
Location1100 Hollenback LnDeer Lodge, MT 59722 · Powell County
Emergency services

Barrett Hospital & Healthcare

Critical Access Hospitals · Dillon, MT
OwnershipGovernment - Hospital District or Authority
CMS Certification Number271318
Location600 Mt Hwy 91 SDillon, MT 59725 · Beaverhead County
Emergency services Birthing friendly

Community Hospital Of Anaconda

Critical Access Hospitals · Anaconda, MT
OwnershipVoluntary non-profit - Private
CMS Certification Number271335
Location401 W PennsylvaniaAnaconda, MT 59711 · Deer Lodge County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 44145 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
$166.65 typical visit price
range $54.34 – $166.65
Typical copayment $41.66 (range $13.58 – $41.66)
Most-billed visit code 99205
Established Patient
$96.44 typical visit price
range $17.10 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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 5

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

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185
Other-Enteral and Parenteral · category OB005N
1 supplier14 claims476 services$11.27 avg. paid by Medicare
Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix B4197
Other-Enteral and Parenteral · category OB005N
1 supplier13 claims91 services$280.49 avg. paid by Medicare
Parenteral nutrition supply kit; premix, per day B4220
Other-Enteral and Parenteral · category OB005N
1 supplier14 claims98 services$8.03 avg. paid by Medicare
Parenteral nutrition administration kit, per day B4224
Other-Enteral and Parenteral · category OB005N
1 supplier14 claims98 services$25.08 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
4 suppliers13 claims13 services$92.99 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

ELIZABETH M CONFALONE
Podiatrist (Foot Surgery)
29101 HEALTH CAMPUS DR, SUITE 200
WESTLAKE, OH 44145
Cuyahoga County (440) 892-6555
JASON T BAKICH DPM LLC
Podiatrist
29101 HEALTH CAMPUS DR
WESTLAKE, OH 44145
Cuyahoga County (440) 899-4399
PANDRANGI PLASTIC SURGERY INC.
Case Management
29101 HEALTH CAMPUS DR, BUILDING 2, SUITE #250
WESTLAKE, OH 44145
Cuyahoga County (440) 835-6196
IOANA MARIANA CIRSTESCU D.D.S.
Dentist (General Practice)
29101 HEALTH CAMPUS DR, SUITE 460
WESTLAKE, OH 44145
Cuyahoga County (440) 835-6100
WESTLAKE HEARING & SPEECH CLINIC, INC.
Clinic/Center (Rehabilitation)
29101 HEALTH CAMPUS DR, SUITE 290
WESTLAKE, OH 44145
Cuyahoga County (440) 835-6160
ENDOVASCULAR IMAGING PARTNERS II, LLC
Radiology (Diagnostic Radiology)
29101 HEALTH CAMPUS DR, BUILDING 2 SUITE 155
WESTLAKE, OH 44145
Cuyahoga County (440) 892-5794
DR. JOHN BRANDON WALTERS MD
Family Medicine (Hospice and Palliative Medicine)
29101 HEALTH CAMPUS DR, SUITE 400
WESTLAKE, OH 44145
Cuyahoga County (440) 892-6680
DR. ROSE MARIE MOHR MD
Otolaryngology (Otolaryngic Allergy)
29101 HEALTH CAMPUS DR, BLDG. 2, STE 230
WESTLAKE, OH 44145
Cuyahoga County (440) 835-6105

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 Marwan Massouh's NPI number?

The NPI number for Marwan Massouh is 1508841669. It was assigned to this individual provider in the NPPES registry on December 13, 2005.

Where is Marwan Massouh located?

Marwan Massouh practices at 29101 Health Campus Dr Suite 260, Westlake, OH 44145. The listed phone number is (440) 808-6500.

What is Marwan Massouh's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Marwan Massouh enrolled in Medicare?

Yes. Marwan Massouh 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 Marwan Massouh accept?

Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP and Providence Health Plan list Marwan Massouh 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 Marwan Massouh affiliated with any hospitals?

According to CMS data, Marwan Massouh is affiliated with St James Healthcare, Community Medical Center, Deer Lodge Medical Center, Barrett Hospital & Healthcare and Community Hospital Of Anaconda.

When was this NPI record last updated?

The NPPES record for Marwan Massouh was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.