GREGORY K KUMKUMIAN M.D.
NPI 1851336200
Internal Medicine - Clinical & Laboratory Immunology in Bethesda, MD

Q: What is Gregory Kumkumian's NPI number?

The NPI number for Gregory Kumkumian is 1851336200. It was assigned to this individual provider in the NPPES registry on June 19, 2006.

Q: What is Gregory Kumkumian's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical & Laboratory Immunology, with taxonomy code 207RI0001X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Kumkumian was last updated on May 9, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.

Active since June 19, 2006PECOS EnrolledAccepts Medicare Assignment

86.79/100

CMS Quality Rating

6410 ROCKLEDGE DRIVE, SUITE 200, BETHESDA, MD 20817(301) 897-5301(301) 897-9589 Get Directions Write a Review

NPPES record last updated: May 9, 2013. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Gregory K Kumkumian M.d. NPPES

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

GREGORY K KUMKUMIAN M.D. (NPI 1851336200) is an individual clinical & laboratory immunology provider in Bethesda, Maryland, licensed in Maryland (D0057032) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Suburban Hospital, and is a graduate of George Washington University School Of Medicine (1994).

NPPES Registry Identity

NPI1851336200

Entity TypeIndividualMale

Primary Taxonomy207RI0001X

Provider Legal NameGREGORY K KUMKUMIANCredential: M.D.

Location Address6410 ROCKLEDGE DRIVE, SUITE 200Bethesda, MD 20817

Mailing Address6410 Rockledge Drive, Suite 200Bethesda, MD 20817 · (301) 897-5301 · Fax (301) 897-9589

Phone(301) 897-5301

Fax(301) 897-9589

Sole ProprietorNo

Medical School CMSGeorge Washington University School Of MedicineGraduated 1994

Enumeration DateJune 19, 2006

Last NPPES UpdateMay 9, 2013

✔ NPI 1851336200 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Clinical & Laboratory ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0001X

License✔ Licensed in MD · D0057032

Definition

An internal medicine physician who specializes in clinical and laboratory immunology disease management.

Also ListedSpecialistTaxonomy 174400000X · License D0057032 (MD)

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License D0057032 (MD)

6410 ROCKLEDGE DRIVE, Bethesda, MD 20817

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Other Identifiers 3

Medicare ID-Type Unspecified016977C83MD

Medicare UPINH34663MD

Medicaid809000900MD

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

Gregory K Kumkumian 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 ID5597735506

PECOS Enrollment IDI20040728000350

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 Gregory Kumkumian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Johns Hopkins Community Physicians, Inc

8.2 mi

Skilled Nursing Facility

7929 WESTPARK DR
Tysons, VA 22102

Reassigned Medicare billing, District of Columbia enrollment
691 clinicians in this Medicare group

NPI 1790631695 (571) 617-0200

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 21

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.

656 services473 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

486 services407 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

307 services272 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

180 services169 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

124 services114 patients

Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist 93458

This procedure involves placing a tube into your left lower heart chamber and coronary artery. It helps doctors diagnose heart conditions by allowing them to view these areas in detail. A radiologist will review the images to ensure accurate diagnosis.

115 services111 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.

83 services49 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

72 services72 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.

51 services51 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.

51 services47 patients

Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch 92928

This procedure involves placing a small, mesh tube (stent) in your coronary artery to keep it open. A balloon is used to expand the stent and artery, improving blood flow to your heart. It's typically done for a single artery or branch.

50 services44 patients

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.

45 services45 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

43 services40 patients

Insertion of tube in coronary artery for diagnosis with review by radiologist 93454

This procedure involves placing a small tube into your coronary artery. It helps to identify any blockages or issues within the artery. A radiologist, a doctor specialized in medical imaging, will review the results to ensure accurate diagnosis.

33 services31 patients

Blood test, clotting time 85610

A clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.

27 services25 patients

Insertion of tube in left heart chambers for diagnosis with review by radiologist 93452

This procedure involves placing a small tube into the left chambers of your heart. It helps doctors diagnose heart conditions by providing clear images. A radiologist, a doctor specializing in medical imaging, reviews these images for accurate diagnosis.

23 services23 patients

Replacement of aortic valve through the skin and femoral artery 33361

This procedure, known as Transcatheter Aortic Valve Replacement (TAVR), involves replacing a damaged aortic valve through a small incision in the leg. A catheter is inserted into the femoral artery and guided up to the heart. The new valve is then positioned and deployed, restoring normal blood flow.

22 services22 patients

Ultrasound evaluation of heart blood vessel or graft with review by radiologist, initial vessel 92978

This procedure involves using ultrasound technology to examine the first vessel of your heart or graft. A radiologist will review the images. It's a non-invasive way to check the health of your heart's blood vessels.

22 services22 patients

Injection for imaging of aorta above heart valve with review by radiologist 93567

This procedure involves injecting a special dye into your bloodstream to enhance the visibility of your aorta on imaging scans. A radiologist then reviews these images to assess the health of your aorta, which is the main artery from your heart.

21 services21 patients

Ultrasound evaluation of heart blood vessel during diagnosis or treatment, initial vessel 93571

This procedure involves using ultrasound technology to examine the first blood vessel of your heart. It helps identify any abnormalities or issues, providing crucial information for diagnosis or treatment. It's a safe, non-invasive process.

14 services14 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.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Suburban Hospital

Acute Care Hospitals · Bethesda, MD

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210022

Location8600 Old Georgetown RoadBethesda, MD 20814 · Montgomery County

Emergency services

Adventist Healthcare Shady Grove Medical Center

Acute Care Hospitals · Rockville, MD

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number210057

Location9901 Medical Center DriveRockville, MD 20850 · Montgomery County

Emergency services Birthing friendly

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.

86.79/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

86.46

Promoting Interoperability

Improvement Activities

Cost

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.

MS. ANNE WEISS LCSW-C

Social Worker (Clinical)

6410 ROCKLEDGE DRIVE, SUITE 308
BETHESDA, MD 20817

Montgomery County (301) 245-2601

JOHN FRANCIS ONEILL JR. MD

Dermatology

6410 ROCKLEDGE DRIVE, SUITE 402
BETHESDA, MD 20817

Montgomery County (301) 530-4800

BERNARD LAWRENCE GREENBAUM DDS

Dentist (General Practice)

6410 ROCKLEDGE DRIVE, #106
BETHESDA, MD 20817

Montgomery County (301) 530-3600

DR. BABAK ARVANAGHI M.D.

Anesthesiology (Pain Medicine)

6410 ROCKLEDGE DRIVE, #110
BETHESDA, MD 20817

Montgomery County (301) 530-7303

MARK JONATHAN JAFFE MD

Dermatology

6410 ROCKLEDGE DRIVE, SUITE 402
BETHESDA, MD 20817

Montgomery County (301) 530-4800

DR. ANDREW DENIS MONTEMARANO D.O.

Dermatology (MOHS-Micrographic Surgery)

6410 ROCKLEDGE DRIVE, SUITE 300
BETHESDA, MD 20817

Montgomery County (301) 564-3131

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 Gregory Kumkumian's NPI number?

The NPI number for Gregory Kumkumian is 1851336200. It was assigned to this individual provider in the NPPES registry on June 19, 2006.

Where is Gregory Kumkumian located?

Gregory Kumkumian practices at 6410 Rockledge Drive Suite 200, Bethesda, MD 20817. The listed phone number is (301) 897-5301.

What is Gregory Kumkumian's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical & Laboratory Immunology, with taxonomy code 207RI0001X.

Is Gregory Kumkumian enrolled in Medicare?

Yes. Gregory Kumkumian 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 Gregory Kumkumian's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Kumkumian reassigns Medicare benefits to Johns Hopkins Community Physicians, Inc (Tysons, VA). 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 Gregory Kumkumian's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Gregory Kumkumian affiliated with any hospitals?

According to CMS data, Gregory Kumkumian is affiliated with Suburban Hospital and Adventist Healthcare Shady Grove Medical Center.

When was this NPI record last updated?

The NPPES record for Gregory Kumkumian was last updated on May 9, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.