1. Home
  2. Directory
  3. Arizona
  4. Tucson
  5. Internal Medicine
  6. NPI Profile

KHAJA SIDDIQUI MD
NPI 1649165036
Internal Medicine in Tucson, AZ

Active since June 09, 2025PECOS Enrolled
3601 S 6TH AVE, TUCSON, AZ 85723(520) 792-1450(520) 629-4631 Get Directions Write a Review

NPPES record last updated: June 10, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

About Khaja Siddiqui Md NPPES

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

KHAJA SIDDIQUI MD (NPI 1649165036) is an individual internal medicine provider in Tucson, Arizona, licensed in Arizona (R82046) and active in the NPI registry since June 2025. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1649165036
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameKHAJA SIDDIQUICredential: MD
Location Address3601 S 6TH AVETucson, AZ 85723-0001
Mailing Address3601 S 6th AveTucson, AZ 85723-0001 · (520) 792-1450 · Fax (520) 629-4631
Phone(520) 792-1450
Fax(520) 629-4631
Sole ProprietorYes
Enumeration DateJune 9, 2025
Last NPPES UpdateJune 10, 2025
NPPES CertifiedJune 10, 2025
✔ NPI 1649165036 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in AZ · R82046
Definition
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.
3601 S 6TH AVE, Tucson, AZ 85723
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Khaja Siddiqui Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85723 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
$127.71 typical visit price
range $55.44 – $168.60
Typical copayment $31.92 (range $13.86 – $42.15)
Most-billed visit code 99204
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
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 20

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

DR. DAVID SPENCER HAMILTON SR. MD
Internal Medicine (Cardiovascular Disease)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
KEVIN JAY CARRASCO PHARM.D.
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
BRITTANY BERNADETTE HERRERA MSW
Social Worker
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
EVAN KEITH MALLORY PHARMD
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
MS. JANICE ELIZABETH THRON-KELLY LCSW
Social Worker (Clinical)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
CRISTINA IRENE MATEI M.D.
Psychiatry & Neurology (Neurology)
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
RAVEN JANIN MARSHALL-SANTILLAN PA-C
Physician Assistant
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450
DR. JEREMY W HALL PHARM D
Pharmacist
3601 S 6TH AVE
TUCSON, AZ 85723
Pima County (520) 792-1450

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 Khaja Siddiqui's NPI number?

The NPI number for Khaja Siddiqui is 1649165036. It was assigned to this individual provider in the NPPES registry on June 9, 2025.

Where is Khaja Siddiqui located?

Khaja Siddiqui practices at 3601 S 6th Ave, Tucson, AZ 85723. The listed phone number is (520) 792-1450.

What is Khaja Siddiqui's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Khaja Siddiqui enrolled in Medicare?

Yes. Khaja Siddiqui is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Khaja Siddiqui was last updated on June 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.