Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Ali Ahmed Siddiqui, MD

Individual provider Gastroenterology Physician · NPI 1265478275

Dr. Ali Ahmed Siddiqui, MD practises Gastroenterology in Fairfax, Virginia. Qualified in 1997, 29 years ago. Practices with Maimonides Faculty Practice Plan, a 246-clinician group, works from 7 locations, accepts Medicare assignment and offers telehealth. Licensed in California, Massachusetts, Texas and Virginia.

Years since qualifying
29
Licensed in
CA, MA, TX, VA
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

8081 Innovation Park Dr Ste 301
Fairfax, VA 22031-4867
Phone: (571) 472-6431
Fax: (571) 665-6826
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (6)

  • 2535 S Downing St, Denver, CO 80210 — (303) 260-2740
  • 301 Memorial Medical Pkwy, Daytona Beach, FL 32117-5167 — (386) 231-3072
  • 119 Belmont St, Worcester, MA 01605-2903 — (508) 334-2846
  • 21 Eastern Ave, Worcester, MA 01605-3094 — (508) 856-8350
  • 55 Lake Ave N, Worcester, MA 01655-0002 — (508) 334-2846
  • 824 N Military Hwy Ste 100, Norfolk, VA 23502-3652 — (757) 390-4551

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 0101274422 (VA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 41307 (TX)
Gastroenterology Physician Taxonomy 207RG0100X · Licence C156639 (CA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 291092 (MA)

Record details

NPI number1265478275
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 20, 2006
Last updated in NPPESAugust 24, 2023
Certification dateAugust 24, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Maimonides Faculty Practice Plan — 246 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 241 times · 93rd percentile
Colonoscopy 30 times · 54th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients208
Services billed 431 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $1,232 18 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $418 5 payments · travel or lodging paid or reimbursed, such as to attend a conference

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Maimonides Faculty Practice Plan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 246 clinicians in the practice; 12 are shown here.

Other providers in Fairfax