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KHANH TAN DUONG MD
NPI 1225528466
Internal Medicine in Montclair, CA

Active since May 14, 2018PECOS EnrolledAccepts Medicare Assignment
9635 MONTE VISTA AVE STE 208, MONTCLAIR, CA 91763(909) 255-0199(216) 208-1435 Get Directions Write a Review

NPPES record last updated: February 25, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 25, 2022, Aug 18, 2018, May 14, 2018 (3 updates tracked since 2018).

About Khanh Tan Duong Md NPPES

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

KHANH TAN DUONG MD (NPI 1225528466) is an individual internal medicine provider in Montclair, California, licensed in California (A174153) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1225528466
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameKHANH TAN DUONGCredential: MD
Location Address9635 MONTE VISTA AVE STE 208Montclair, CA 91763-2235
Mailing Address9635 Monte Vista Ave Ste 208Montclair, CA 91763-2235 · (909) 255-0199 · Fax (216) 208-1435
Phone(909) 255-0199
Fax(216) 208-1435
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateMay 14, 2018
Last NPPES UpdateFebruary 25, 20223 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2022
✔ NPI 1225528466 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A174153✔ Licensed in TX · BP10064981
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.
9635 MONTE VISTA AVE STE 208, Montclair, CA 91763
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of North Dakota.Insurance ›

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

Khanh Tan Duong 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 ID7113270026
PECOS Enrollment IDI20211129001121
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 Khanh Duong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Inpatient Specialists Of California, PC
24 mi
Internal Medicine
2101 N WATERMAN AVE
San Bernardino, CA 92404
  • Reassigned Medicare billing, California enrollment
  • 1,216 clinicians in this Medicare group
NPI 1952792475 (615) 377-5658
Hospitalist Medicine Physicians Of California, Inc
40 mi
Internal Medicine
18300 US HIGHWAY 18
Apple Valley, CA 92307
  • Reassigned Medicare billing, California enrollment
  • 914 clinicians in this Medicare group
NPI 1184663965 (760) 946-4233

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 7

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.

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.
460 services172 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
223 services211 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
129 services125 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.
90 services46 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.
73 services39 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
22 services22 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91763 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

Referred Medical Equipment & Supplies CMS DME claims 3

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers33 claims33 services$14.86 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers14 claims14 services$4.72 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers36 claims36 services$68.45 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

KHANH TAN DUONG MD PC
Clinic/Center (Primary Care)
9635 MONTE VISTA AVE STE 208
MONTCLAIR, CA 91763
San Bernardino County (909) 255-0199

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 Khanh Duong's NPI number?

The NPI number for Khanh Duong is 1225528466. It was assigned to this individual provider in the NPPES registry on May 14, 2018.

Where is Khanh Duong located?

Khanh Duong practices at 9635 Monte Vista Ave Ste 208, Montclair, CA 91763. The listed phone number is (909) 255-0199.

What is Khanh Duong's specialty?

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

Is Khanh Duong enrolled in Medicare?

Yes. Khanh Duong 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 Khanh Duong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Khanh Duong reassigns Medicare benefits to 2 organizations: Inpatient Specialists Of California, PC (San Bernardino, CA) and Hospitalist Medicine Physicians Of California, Inc (Apple Valley, CA). 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 Khanh Duong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Khanh Duong accept?

Health plans from Blue Cross Blue Shield of North Dakota list Khanh Duong as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Khanh Duong was last updated on February 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.