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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

TENG H CHANG M.D.
NPI 1255312328
Internal Medicine in Littleton, CO

Active since November 07, 2005PECOS EnrolledAccepts Medicare Assignment
8199 SOUTHPARK LN STE 100, LITTLETON, CO 80120(303) 730-3332(303) 730-7766 Get Directions Write a Review

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

Record update history: Sep 24, 2026, Apr 16, 2026, May 1, 2024 and 1 more (4 updates tracked since 2019).

About Teng H Chang M.d. NPPES

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

TENG H CHANG M.D. (NPI 1255312328) is an individual internal medicine provider in Littleton, Colorado, licensed in Colorado (DR.0043787) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (2002).

NPPES Registry Identity

NPI1255312328
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameTENG H CHANGCredential: M.D.
Location Address8199 SOUTHPARK LN STE 100Littleton, CO 80120-5665
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(303) 730-3332
Fax(303) 730-7766
Sole ProprietorNo
Medical School CMSUniversity Of Kansas School Of Med (kc/wich/sal)Graduated 2002
Enumeration DateNovember 7, 2005
Last NPPES UpdateSeptember 24, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 24, 2026
✔ NPI 1255312328 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CO · DR.0043787
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.
8199 SOUTHPARK LN STE 100, Littleton, CO 80120
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Other Identifiers 1

Medicaid9000198879CO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.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

Teng H Chang M.d. 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 ID2769402395
PECOS Enrollment IDI20051130000276
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 Teng Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

New West Physicians Inc
Same address
Internal Medicine
8199 SOUTHPARK LN STE 100
Littleton, CO 80120
  • Reassigned Medicare billing, Colorado enrollment
  • 142 clinicians in this Medicare group
NPI 1912515149 (303) 730-3332
Optumcare Colorado Medical Group LLC
14 mi
Family Medicine
1707 COLE BLVD STE 100
Golden, CO 80401
  • Reassigned Medicare billing, Colorado enrollment
  • 314 clinicians in this Medicare group
NPI 1992562441 (303) 763-4900

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 8

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.

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.
501 services186 patients
Assessment of emotional or behavioral problems 96127
Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.
493 services191 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.
90 services90 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.
87 services63 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.
15 services14 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80120 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
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
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 11

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
10 suppliers36 claims102 services$6.53 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
6 suppliers13 claims13 services$1.04 avg. paid by Medicare
Tubing with integrated heating element for use with positive airway pressure device A4604
DME-Other DME · category DE001N
5 suppliers11 claims11 services$37.23 avg. paid by Medicare
Full face mask used with positive airway pressure device, each A7030
DME-Other DME · category DE001N
7 suppliers27 claims27 services$72.23 avg. paid by Medicare
Face mask interface, replacement for full face mask, each A7031
DME-Other DME · category DE001N
7 suppliers27 claims66 services$25.15 avg. paid by Medicare
Headgear used with positive airway pressure device A7035
DME-Other DME · category DE001N
6 suppliers19 claims19 services$15.09 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 9

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

JASON PEREIRA MD
Internal Medicine
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 763-4900
MICHELLE ALLISON SPEKTOR
Physician Assistant (Medical)
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
DANIELLE CHAMBERLAIN PA-C
Physician Assistant
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
MRS. KIMBERLY E. WINTER MD
Family Medicine
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
ROBERT M DOUGLAS MD
Family Medicine
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
LABORATORY CORPORATION OF AMERICA
Clinical Medical Laboratory
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
ARAPAHOE INTERNAL MEDICINE, PC
Internal Medicine
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332
OPTUMCARE COLORADO MEDICAL GROUP LLC
Internal Medicine
8199 SOUTHPARK LN STE 100
LITTLETON, CO 80120
Arapahoe County (303) 730-3332

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 Teng Chang's NPI number?

The NPI number for Teng Chang is 1255312328. It was assigned to this individual provider in the NPPES registry on November 7, 2005.

Where is Teng Chang located?

Teng Chang practices at 8199 Southpark Ln Ste 100, Littleton, CO 80120. The listed phone number is (303) 730-3332.

What is Teng Chang's specialty?

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

Is Teng Chang enrolled in Medicare?

Yes. Teng Chang 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 Teng Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Teng Chang reassigns Medicare benefits to 2 organizations: New West Physicians Inc (Littleton, CO) and Optumcare Colorado Medical Group LLC (Golden, CO). 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 Teng Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Teng Chang accept?

Health plans from UnitedHealthcare list Teng Chang 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 Teng Chang was last updated on September 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 33 days 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.