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

Active since October 06, 2005PECOS EnrolledAccepts Medicare Assignment
62.13/100
CMS Quality Rating
6311 RICHMOND HWY, ALEXANDRIA, VA 22306(703) 647-6087(703) 647-6088 Get Directions Write a Review

NPPES record last updated: February 2, 2022. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Gregor Siebert P.a. NPPES

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

GREGOR SIEBERT P.A. (NPI 1700873510) is an individual medical provider in Alexandria, Virginia, licensed in Virginia (0110004442) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS and is a graduate of Other (2001).

NPPES Registry Identity

NPI1700873510
Entity TypeIndividualMale
Primary Taxonomy363AM0700X
Provider Legal NameGREGOR SIEBERTCredential: P.A.
Location Address6311 RICHMOND HWYAlexandria, VA 22306-6410
Mailing Address5000 Cox Rd, Suite 100Glen Allen, VA 23060-9263 · (804) 968-5700 · Fax (804) 217-7991
Phone(703) 647-6087
Fax(703) 647-6088
Sole ProprietorNo
Medical School CMSOtherGraduated 2001
Enumeration DateOctober 6, 2005
Last NPPES UpdateFebruary 2, 2022
NPPES CertifiedFebruary 2, 2022
✔ NPI 1700873510 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AM0700X
License✔ Licensed in VA · 0110004442
6311 RICHMOND HWY, Alexandria, VA 22306
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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

Gregor Siebert P.a. 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 ID9830319722
PECOS Enrollment IDI20141222002696
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 3

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.

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.
22 services22 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.
17 services17 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.
13 services13 patients

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.

62.13/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality72.43
Promoting Interoperability0
Improvement Activities40
Cost84.66

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

AZRA MAHMOOD HADI M.D.
Family Medicine
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
DR. MICHAEL SEIJI OSHIKI M.D.
Family Medicine
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
JULIE B. KRUSLING
Internal Medicine
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
CARIN LEE JENKINS PA-C
Physician Assistant
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
BAHIA CHACAL PA
Physician Assistant
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
CHONGFEI JIN M.D.
Internal Medicine
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
JESSIE SHORE NIELSEN PA-C
Physician Assistant
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087
BENJAMIN H JESSEE PA-C
Physician Assistant
6311 RICHMOND HWY
ALEXANDRIA, VA 22306
Fairfax County (703) 647-6087

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 Gregor Siebert's NPI number?

The NPI number for Gregor Siebert is 1700873510. It was assigned to this individual provider in the NPPES registry on October 6, 2005.

Where is Gregor Siebert located?

Gregor Siebert practices at 6311 Richmond Hwy, Alexandria, VA 22306. The listed phone number is (703) 647-6087.

What is Gregor Siebert's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Is Gregor Siebert enrolled in Medicare?

Yes. Gregor Siebert 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.

When was this NPI record last updated?

The NPPES record for Gregor Siebert was last updated on February 2, 2022. NPI Profile syncs with the weekly NPPES data releases published by CMS.