DR. ALI AHMED SIDDIQUI MD
NPI 1265478275
Internal Medicine - Gastroenterology in Fairfax, VA

Q: What is Ali Siddiqui's NPI number?

The NPI number for Ali Siddiqui is 1265478275. It was assigned to this individual provider in the NPPES registry on June 20, 2006.

Q: What is Ali Siddiqui's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Ali Siddiqui was last updated on August 24, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 20, 2006PECOS EnrolledAccepts Medicare Assignment

8081 INNOVATION PARK DR STE 301, FAIRFAX, VA 22031(571) 472-6431(571) 665-6826 Get Directions Write a Review

NPPES record last updated: August 24, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 24, 2023, May 18, 2022, Apr 6, 2022 and 5 more (8 updates tracked since 2017).

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About Dr. Ali Ahmed Siddiqui Md NPPES

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

DR. ALI AHMED SIDDIQUI MD (NPI 1265478275) is an individual gastroenterology provider in Fairfax, Virginia, licensed in Virginia (0101274422) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Maimonides Medical Center, and maintains 6 additional practice locations.

NPPES Registry Identity

NPI1265478275

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. ALI AHMED SIDDIQUICredential: MD

Location Address8081 INNOVATION PARK DR STE 301Fairfax, VA 22031-4867

Mailing AddressPo Box 37174Baltimore, MD 21297-3174 · (571) 423-5699 · Fax (571) 423-5698

Phone(571) 472-6431

Fax(571) 665-6826

Sole ProprietorNo

Medical School CMSOtherGraduated 1997

Enumeration DateJune 20, 2006

Last NPPES UpdateAugust 24, 20238 updates tracked since enumeration

NPPES CertifiedAugust 24, 2023

✔ NPI 1265478275 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in VA · 0101274422✔ Licensed in TX · 41307✔ Licensed in CA · C156639✔ Licensed in MA · 291092

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

8081 INNOVATION PARK DR STE 301, Fairfax, VA 22031

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Secondary Practice Locations 6

Location 12535 S Downing St, Suite 360Denver, CO 80210 · Phone (303) 260-2740 · Fax (303) 260-2741

Location 2824 N Military Hwy Ste 100Norfolk, VA 23502-3652 · Phone (757) 390-4551

Location 355 Lake Ave NWorcester, MA 01655-0002 · Phone (508) 334-2846 · Fax (508) 856-3981

Location 4119 Belmont StWorcester, MA 01605-2903 · Phone (508) 334-2846 · Fax (508) 856-3981

Location 521 Eastern AveWorcester, MA 01605-3094 · Phone (508) 856-8350 · Fax (508) 856-8437

Location 6301 Memorial Medical PkwyDaytona Beach, FL 32117-5167 · Phone (386) 231-3072 · Fax (386) 231-5962

Other Identifiers 1

Medicaid1024226000001PA

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

Dr. Ali Ahmed Siddiqui Md 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 ID547261190

PECOS Enrollment IDI20250509001659

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 Reassignments

Medicare enrollment records show Ali Siddiqui reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inova Health Care Services

Same address

Medical Oncology

8081 INNOVATION PARK DR
Fairfax, VA 22031

Reassigned Medicare billing, District of Columbia and Virginia enrollments
Also billed through NPI 1952320061 (District of Columbia), NPI 1588717755 (Virginia)
258 clinicians in this Medicare group

NPI 1275097123 (703) 289-2454

Dlp Conemaugh Physician Practices LLC

115 mi

Rural Health

4186 CORTLAND DR
New Paris, PA 15554

Reassigned Medicare billing, Pennsylvania enrollment
771 clinicians in this Medicare group

NPI 1265848600 (814) 839-4108

Sentara Medical Group

149 mi

Family Medicine

824 N MILITARY HWY STE 100
Norfolk, VA 23502

Reassigned Medicare billing, Virginia enrollment
1,901 clinicians in this Medicare group

NPI 1265485270 (757) 252-2900

Maimonides Faculty Practice Plan

211 mi

Internal Medicine

4802 10TH AVE
Brooklyn, NY 11219

Reassigned Medicare billing, New York enrollment
1,177 clinicians in this Medicare group

NPI 1053344846 (718) 283-8700

Bronson Methodist Hospital

499 mi

Hospitalist

601 JOHN STREET
Kalamazoo, MI 49007

Reassigned Medicare billing, Michigan enrollment
1,133 clinicians in this Medicare group

NPI 1417961137 (269) 341-7654

Adventist Health Physicians Network

2,267 mi

Family Medicine

2559 W ROSAMOND BLVD STE D
Rosamond, CA 93560

Reassigned Medicare billing, California enrollment
678 clinicians in this Medicare group

NPI 1609633973 (661) 241-6700

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 11

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.

Review by radiologist of image from tube placement into bile duct using an endoscope 74328

This procedure involves a specialist, called a radiologist, examining an image taken during a tube placement into your bile duct. The tube is inserted with the help of a tool called an endoscope. This allows the doctor to check for any issues or abnormalities in your bile duct.

38 services32 patients

Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264

This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.

35 services28 patients

Replacement of stent in pancreatic or bile duct using a flexible endoscope 43276

This procedure involves replacing an existing stent in your pancreatic or bile duct. A flexible endoscope, a tube-like device with a light and camera, is used to view and access the area. The old stent is removed and a new one is placed to help keep the duct open.

31 services12 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.

28 services26 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.

19 services18 patients

Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth 43237

This procedure involves a flexible tube with a camera and ultrasound device, inserted through the mouth to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like inflammation, tumors, or other abnormalities.

17 services17 patients

Hospital Affiliations CMS Care Compare

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

Maimonides Medical Center

Acute Care Hospitals · Brooklyn, NY

1/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330194

Location4802 Tenth AvenueBrooklyn, NY 11219 · Kings County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22031 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$147.85 typical visit price

range $65.18 – $194.86

Typical copayment $36.96 (range $16.29 – $48.71)

Most-billed visit code 99204

Established Patient

$113.72 typical visit price

range $21.40 – $158.88

Typical copayment $28.43 (range $5.35 – $39.72)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 12

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

KIMBERLY ANN KINNEY FNP

Nurse Practitioner