ROY MARIE A MARGALLO M.D.
NPI 1538314950
Internal Medicine in Las Vegas, NV

NPI Status: Active since November 26, 2008

Contact Information

2255 RENAISSANCE DR STE B
LAS VEGAS, NV
ZIP 89119
Phone: (702) 500-1728
Fax: (702) 356-3102

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  • Individual
  • Male
  • Years of Experience 33
  • Internal Medicine
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ROY MARIE MARGALLO

This page provides the complete NPI Profile along with additional information for Roy Marie Margallo, an internist established in Las Vegas, Nevada with a medical specialization in Internal Medicine and more than 33 years of experience. The healthcare provider is registered in the NPI registry with number 1538314950 assigned on November 2008. The practitioner's primary taxonomy code is 207R00000X with license number 14033 (NV). The provider is registered as an individual and his NPI record was last updated April 2026.

NPI
1538314950
Provider Name
ROY MARIE A MARGALLO M.D.
Gender
Male
Entity Type
Individual
Location Address
2255 RENAISSANCE DR STE B LAS VEGAS, NV 89119
Location Phone
(702) 500-1728
Location Fax
(702) 356-3102
Mailing Address
2255 RENAISSANCE DR STE B LAS VEGAS, NV 89119
Mailing Phone
(702) 500-1728
Mailing Fax
(702) 356-3102
Medical School Name
OTHER
Graduation Year
1994
Is Sole Proprietor?
Yes
Enumeration Date
11-26-2008
Last Update Date
04-23-2026
Code Navigator

An internist like Roy Marie Margallo is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Internal Medicine

Taxonomy Code
207R00000X
Type
Allopathic & Osteopathic Physicians
License No.
14033
License State
NV
Taxonomy Description
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Medicare Participation & PECOS Enrollment Status

Roy Marie Margallo is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Roy Marie Margallo is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 7416129739

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20111011000181

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Medical/Surgical Supplies (DA000N)

    Tape, waterproof, per 18 square inches (HCPCS:A4452)

    2 DME suppliers used 14 Medicare Claims 568 Services Paid

  • DME-Medical/Surgical Supplies (DA023N)

    Collagen dressing, sterile, size 16 sq. in. or less, each (HCPCS:A6021)

    4 DME suppliers used 19 Medicare Claims 328 Services Paid

  • DME-Medical/Surgical Supplies (DA023N)

    Alginate or other fiber gelling dressing, wound cover, sterile, pad size 16 sq. in. or less, each dressing (HCPCS:A6196)

    3 DME suppliers used 13 Medicare Claims 260 Services Paid

  • DME-Medical/Surgical Supplies (DA023N)

    Gauze, non-impregnated, sterile, pad size 16 sq. in. or less, without adhesive border, each dressing (HCPCS:A6402)

    4 DME suppliers used 11 Medicare Claims 506 Services Paid

  • DME-Medical/Surgical Supplies (DA023N)

    Conforming bandage, non-elastic, knitted/woven, sterile, width greater than or equal to three inches and less than five inches, per yard (HCPCS:A6446)

    3 DME suppliers used 11 Medicare Claims 1414 Services Paid

  • DME-Hospital Beds (DB000N)

    Hospital bed, semi-electric (head and foot adjustment), with any type side rails, without mattress (HCPCS:E0261)

    2 DME suppliers used 14 Medicare Claims 14 Services Paid

  • DME-Oxygen and Supplies (DC000N)

    Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing (HCPCS:E0431)

    2 DME suppliers used 59 Medicare Claims 59 Services Paid

  • DME-Other DME (DE000N)

    Nebulizer, with compressor (HCPCS:E0570)

    2 DME suppliers used 30 Medicare Claims 30 Services Paid

  • DME-Other DME (DE000N)

    Transport chair, adult size, patient weight capacity up to and including 300 pounds (HCPCS:E1038)

    1 DME suppliers used 11 Medicare Claims 11 Services Paid

  • DME-Oxygen and Supplies (DC002N)

    Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)

    2 DME suppliers used 69 Medicare Claims 69 Services Paid

  • DME-Wheelchairs (DD000N)

    Standard wheelchair (HCPCS:K0001)

    1 DME suppliers used 23 Medicare Claims 23 Services Paid

  • DME-Wheelchairs (DD000N)

    Heavy duty wheelchair (HCPCS:K0006)

    1 DME suppliers used 15 Medicare Claims 15 Services Paid

  • DME-Wheelchairs (DD021N)

    Elevating leg rests, pair (for use with capped rental wheelchair base) (HCPCS:K0195)

    1 DME suppliers used 13 Medicare Claims 13 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 189 times for 37 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 25 times for 20 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 42 times for 32 patients

Established patient office or other outpatient visit, 40-54 minutes

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.

This service was performed 37 times for 24 patients

Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

This service was performed 512 times for 418 patients

New patient office or other outpatient visit, 60-74 minutes

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.

This service was performed 14 times for 14 patients

New patient office or other outpatient visit, 60-74 minutes

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.

This service was performed 15 times for 15 patients

Nursing facility discharge management, more than 30 minutes

Nursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.

This service was performed 58 times for 53 patients

Removal of skin and tissue, 20.0 sq cm or less

This procedure involves the surgical removal of skin and tissue, up to 20.0 square cm in size. It's often performed to treat conditions like skin cancer or to remove moles, warts, and other skin lesions. The area is numbed and the unwanted tissue is carefully cut out.

This service was performed 168 times for 67 patients

Removal of skin and tissue, 20.0 sq cm or less

This procedure involves the surgical removal of skin and tissue, up to 20.0 square cm in size. It's often performed to treat conditions like skin cancer or to remove moles, warts, and other skin lesions. The area is numbed and the unwanted tissue is carefully cut out.

This service was performed 79 times for 13 patients

Removal of skin and tissue, each additional 20.0 sq cm or less

This procedure involves the removal of skin and tissue, typically due to disease, injury, or abnormal growth. Each session removes an area of 20.0 square cm or less. It's performed by a trained professional and may require multiple sessions for larger areas.

This service was performed 42 times for 12 patients

Removal of tissue from wound, 20.0 sq cm or less

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

This service was performed 34 times for 19 patients

Removal of tissue from wound, 20.0 sq cm or less

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

This service was performed 87 times for 12 patients

Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes

An established patient home visit is a service where a healthcare professional visits a patient's home for a check-up or treatment. The visit typically lasts for about an hour. This service is especially beneficial for patients who may have difficulty traveling to a healthcare facility.

This service was performed 156 times for 34 patients

Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes

An established patient home visit is a 25-minute appointment where a healthcare provider visits you at your home. This service is for patients who have previously been seen by the provider. It includes a check-up and discussion about your health concerns.

This service was performed 21 times for 14 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

This service was performed 84 times for 25 patients

Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes

A new patient home visit is a comprehensive service where a healthcare professional visits your home for about an hour. This visit includes an overall health assessment, discussion about your medical history, and planning for future healthcare needs. The goal is to understand your health status and provide personalized care.

This service was performed 34 times for 34 patients

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

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.

This service was performed 16 times for 16 patients

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

This service was performed 1,906 times for 387 patients

Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes

A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.

This service was performed 101 times for 53 patients

Telehealth originating site facility fee

The Telehealth originating site facility fee is a charge for the location where you receive your telehealth service, such as a clinic or hospital. It covers costs like equipment use, technical support, and other resources needed to provide a secure, effective telehealth visit.

This service was performed 59 times for 35 patients

Transitional care management services for problem of high complexity

Transitional care management services are designed to ensure a smooth transition from a hospital to home or another care setting for patients with complex health issues. These services include medication management, patient education, and coordination with healthcare providers.

This service was performed 13 times for 11 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $32.81 for a new patient copayment and $25.15 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 89119 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $131.25
  • Minimum New Patient Price $57.07
  • Maximum New Patient Price $173.24
  • Average New Patient Copayment $32.81
  • Minimum New Patient Copayment $14.26
  • Maximum New Patient Copayment $43.31

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $100.6
  • Minimum Established Patient Price $18.27
  • Maximum Established Patient Price $140.96
  • Average Established Patient Copayment $25.15
  • Minimum Established Patient Copayment $4.56
  • Maximum Established Patient Copayment $35.24

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Roy Marie Margallo is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
SUMMERLIN HOSPITAL MEDICAL CENTER657 TOWN CENTER DRIVE
LAS VEGAS, NV 89144
(702) 233-7500Acute Care Hospitals
HENDERSON HOSPITAL1050 WEST GALLERIA DRIVE
HENDERSON, NV 89011
(702) 963-7000Acute Care Hospitals

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1538314950, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
5
Unchanged
Pos 3
3
Doubled → 6
Pos 4
8
Unchanged
Pos 5
3
Doubled → 6
Pos 6
1
Unchanged
Pos 7
4
Doubled → 8
Pos 8
9
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
0
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 3 → 6 3 → 6 4 → 8 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 5 + 6 + 8 + 6 + 1 + 8 + 9 + 1 + 0 + 24 = 70

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 70 is 70. The difference is the calculated check digit.

70 - 70 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1538314950.

Other Providers at the Same Location


The following 4 providers are registered at the same or a nearby location.

Nurse Practitioner (Family)
2255 RENAISSANCE DR STE B
LAS VEGAS, NV 89119
Nurse Practitioner (Psychiatric/Mental Health)
2255 RENAISSANCE DR STE B
LAS VEGAS, NV 89119
Internal Medicine
2255 RENAISSANCE DR STE B
LAS VEGAS, NV 89119
Internal Medicine
2255 RENAISSANCE DR STE B
LAS VEGAS, NV 89119

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1538314950, enumerated as an "individual" on November 26, 2008.

The provider is located at 2255 RENAISSANCE DR STE B LAS VEGAS, NV 89119 and the phone number is (702) 500-1728.

Internal Medicine with taxonomy code 207R00000X.

Roy Marie Margallo is affiliated with: SUMMERLIN HOSPITAL MEDICAL CENTER and HENDERSON HOSPITAL.