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XIAO JUN WENG MD
NPI 1407219371
Psychiatry & Neurology - Neurology in Middlebury, CT

Active since March 30, 2016PECOS EnrolledAccepts Medicare Assignment
1579 STRAITS TPKE STE 2A, MIDDLEBURY, CT 06762(870) 918-8686 Get Directions Write a Review

NPPES record last updated: September 15, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 15, 2021, Jun 10, 2021, Mar 30, 2016 (3 updates tracked since 2016).

About Xiao Jun Weng Md NPPES

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

XIAO JUN WENG MD (NPI 1407219371) is an individual neurology provider in Middlebury, Connecticut, licensed in Connecticut (68180) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS and is a graduate of University Of Arkansas College Of Medicine (2016).

NPPES Registry Identity

NPI1407219371
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameXIAO JUN WENGCredential: MD
Location Address1579 STRAITS TPKE STE 2AMiddlebury, CT 06762-1835
Mailing Address1579 Straits Tpke Ste 2aMiddlebury, CT 06762-1835 · (203) 758-8995 · Fax (203) 758-2571
Phone(870) 918-8686
Sole ProprietorNo
Medical School CMSUniversity Of Arkansas College Of MedicineGraduated 2016
Enumeration DateMarch 30, 2016
Last NPPES UpdateSeptember 15, 20213 updates tracked since enumeration
NPPES CertifiedSeptember 15, 2021
✔ NPI 1407219371 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in CT · 68180
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
1579 STRAITS TPKE STE 2A, Middlebury, CT 06762
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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

Xiao Jun Weng 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 ID9739581794
PECOS Enrollment IDI20210713002610
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

2

Medicare enrollment records show Xiao Jun Weng reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Trinity Health Of New England Provider Network Organization Inc
26 mi
Internal Medicine
114 WOODLAND ST, SAINT FRANCIS MEDICAL GROUP INC.
Hartford, CT 06105
  • Reassigned Medicare billing, Connecticut enrollment
  • 1,186 clinicians in this Medicare group
NPI 1003882812 (860) 714-1325
Mercy Inpatient Medical Associates Inc.
47 mi
Internal Medicine
271 CAREW ST
Springfield, MA 01104
  • Reassigned Medicare billing, Massachusetts enrollment
  • 168 clinicians in this Medicare group
NPI 1407845282 (413) 748-9321

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 15

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.

Injection, onabotulinumtoxina, 1 unit J0585
Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.
4,600 services11 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.
120 services76 patients
Needle measurement of electrical activity in arm or leg muscles, complete study 95886
This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.
100 services57 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
48 services38 patients
Needle measurement of electrical activity in arm or leg muscles, complete study 95886
This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.
42 services24 patients
Nerve conduction, 7-8 studies 95910
Nerve conduction studies involve testing the speed and strength of signals traveling through your nerves. This helps doctors identify nerve damage. In a 7-8 study procedure, 7-8 specific nerves are tested. You may feel a mild, brief tingling or shock during the test.
40 services39 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06762 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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.

Patient Reviews User submitted

Reviews are submitted by site visitors and approved by a human moderator before publication.

Review by June ***** April 8, 2026

5/5
I have had Dr Weng for several years and I cannot ever put into words how competent he his plus how much he has helped me with so many of my issues. I JUST love Dr. Weng, would never even think of going to another doctor.
Provider 5/5 Office Staff 5/5
Visited this provider? Share your experience.

Other Providers at the Same Location NPPES 3

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

UROLOGY ASSOCIATES OF WATERBURY LLC
Urology
1579 STRAITS TPKE STE 2A
MIDDLEBURY, CT 06762
Naugatuck Valley Planning Region (203) 757-8361
DR. BRITTANY MARY ZARRELLA DNP, APRN, FNP-C
Nurse Practitioner (Family)
1579 STRAITS TPKE STE 2A
MIDDLEBURY, CT 06762
Naugatuck Valley Planning Region (203) 758-8995
PINKY GABA APRN, FNP
Nurse Practitioner
1579 STRAITS TPKE STE 2A
MIDDLEBURY, CT 06762
Naugatuck Valley Planning Region (203) 757-8361

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 Xiao Jun Weng's NPI number?

The NPI number for Xiao Jun Weng is 1407219371. It was assigned to this individual provider in the NPPES registry on March 30, 2016.

Where is Xiao Jun Weng located?

Xiao Jun Weng practices at 1579 Straits Tpke Ste 2A, Middlebury, CT 06762. The listed phone number is (870) 918-8686.

What is Xiao Jun Weng's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is Xiao Jun Weng enrolled in Medicare?

Yes. Xiao Jun Weng 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.

Which organizations bill Medicare for Xiao Jun Weng's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Xiao Jun Weng reassigns Medicare benefits to 2 organizations: Trinity Health Of New England Provider Network Organization Inc (Hartford, CT) and Mercy Inpatient Medical Associates Inc. (Springfield, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Xiao Jun Weng's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Xiao Jun Weng was last updated on September 15, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.