GREGOR SIEBERT P.A.
NPI 1700873510
Physician Assistant - Medical in Alexandria, VA


Quality Rating: 81.79 out of 100 score

NPI Status: Active since October 06, 2005

Contact Information

6311 RICHMOND HWY
ALEXANDRIA, VA
ZIP 22306
Phone: (703) 647-6087
Fax: (703) 647-6088

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  • Individual
  • Male
  • Years of Experience 25
  • Physician Assistant
  • Medical
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About GREGOR SIEBERT

This page provides the complete NPI Profile along with additional information for Gregor Siebert, a primary care provider established in Alexandria, Virginia with a medical specialization in Physician Assistant, focusing in medical and more than 25 years of experience. The healthcare provider is registered in the NPI registry with number 1700873510 assigned on October 2005. The practitioner's primary taxonomy code is 363AM0700X with license number 0110004442 (VA). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1700873510
Provider Name
GREGOR SIEBERT P.A.
Gender
Male
Entity Type
Individual
Location Address
6311 RICHMOND HWY ALEXANDRIA, VA 22306
Location Phone
(703) 647-6087
Location Fax
(703) 647-6088
Mailing Address
5000 COX RD SUITE 100 GLEN ALLEN, VA 23060
Mailing Phone
(804) 968-5700
Mailing Fax
(703) 647-6088
Medical School Name
OTHER
Graduation Year
2001
Is Sole Proprietor?
No
Enumeration Date
10-06-2005
Last Update Date
02-02-2022
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A primary care provider (PCP) like Gregor Siebert sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc

Location Map

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

Physician Assistant Medical

Taxonomy Code
363AM0700X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
0110004442
License State
VA

Medicare Participation & PECOS Enrollment Status

Gregor Siebert 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.

Gregor Siebert 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: 9830319722

    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: I20141222002696

    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

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.

Blood test, basic group of blood chemicals (calcium, ionized)

A basic group of blood chemicals test, including calcium and ionized, is a simple procedure where a small amount of blood is drawn from your arm. This test helps assess your body's overall health and detect potential disorders like kidney disease or bone disease.

This service was performed 15 times for 15 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

This service was performed 13 times for 13 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza

This test uses a method called immunoassay to identify severe acute respiratory syndrome coronavirus and influenza. It works by detecting specific proteins (antigens) in a sample, like a nasal swab. It's a powerful tool in diagnosing these viral infections.

This service was performed 31 times for 29 patients

Detection test by immunoassay with direct visual observation for streptococcus, group a (strep)

A detection test by immunoassay for Group A Strep is a quick procedure to identify a bacterial infection in your throat. It involves taking a throat swab and applying it to a test strip, which changes color if Strep bacteria are present.

This service was performed 11 times for 11 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 16 times for 16 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 33 times for 30 patients

Insertion of needle into vein for collection of blood sample

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

This service was performed 17 times for 17 patients

New patient office or other outpatient visit, 30-44 minutes

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.

This service was performed 15 times for 15 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 24 times for 24 patients

X-ray of chest, 2 views

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

This service was performed 16 times for 16 patients

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 81.79, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 81.79 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 79.12

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 89

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: 69.35

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: 69.35

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1700873510
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2700167652
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 7 + 0 + 0 + 1 + 6 + 7 + 6 + 5 + 2 + 24 = 60
Step 3: because the number obtained in step 2 ends in zero, the check digit is zero.
0

The NPI number 1700873510 is valid because the calculated check digit 0 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 13 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1114149911 AZRA MAHMOOD HADI M.D.
Individual
Family Medicine6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1598129371 CHONGFEI JIN M.D.
Individual
Internal Medicine6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1750368601 ROSE E FRAZIER PAC
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1194876086DR. MICHAEL SEIJI OSHIKI M.D.
Individual
Family Medicine6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1609381219 ASHLEIGH JORDAN TILLER NP
Individual
Nurse Practitioner6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1326357864 CARIN LEE JENKINS PA-C
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1326013541 JULIE B. KRUSLING
Individual
Internal Medicine6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1770656365DR. MARK A PASTER M.D.
Individual
Family Medicine6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1346911955 BAHIA CHACAL PA
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1730896242 BENJAMIN H JESSEE PA-C
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1629717665 JESSIE SHORE NIELSEN PA-C
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1073141867DR. MARCO HANI AYAD MD
Individual
Surgery6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087
1902481708MRS. RACHEL FROST PA-C
Individual
Physician Assistant6311 RICHMOND HWY
ALEXANDRIA, VA 22306
(703) 647-6087

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1700873510, enumerated in the NPI registry as an "individual" on October 06, 2005

The provider is located at 6311 Richmond Hwy Alexandria, Va 22306 and the phone number is (703) 647-6087

The provider's speciality is Physician Assistant with taxonomy code 363AM0700X with a focus in Medical

The provider has more than 25 years of experience.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.

The provider has an overall high rating in the following quality measures: uses technology to exchange and make use of healthcare information.

The most common procedures or services performed by this practitioner are: Blood test, basic group of blood chemicals (calcium, ionized), Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count, Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza, Detection test by immunoassay with direct visual observation for streptococcus, group a (strep), Established patient office or other outpatient visit, 20-29 minutes, Established patient office or other outpatient visit, 30-39 minutes, Insertion of needle into vein for collection of blood sample, New patient office or other outpatient visit, 30-44 minutes, New patient office or other outpatient visit, 45-59 minutes and X-ray of chest, 2 views.

This NPI record was last updated on October 06, 2005. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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