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DR. DAN HAI NGUYEN M.D.
NPI 1639495617
Psychiatry & Neurology - Psychiatry in Lone Tree, CO

Active since April 15, 2010PECOS Enrolled
10101 RIDGEGATE PKWY, LONE TREE, CO 80124(303) 338-4545(303) 344-7715 Get Directions Write a Review

NPPES record last updated: June 13, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jun 13, 2021, Jan 22, 2021, Aug 6, 2018 (3 updates tracked since 2018).

About Dr. Dan Hai Nguyen M.d. NPPES

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

DR. DAN HAI NGUYEN M.D. (NPI 1639495617) is an individual psychiatry provider in Lone Tree, Colorado, licensed in Colorado (0052192) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639495617
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. DAN HAI NGUYENCredential: M.D.
Location Address10101 RIDGEGATE PKWYLone Tree, CO 80124
Mailing Address10350 E Dakota AveDenver, CO 80247-1314 · (303) 338-4545
Phone(303) 338-4545
Fax(303) 344-7715
Sole ProprietorNo
Enumeration DateApril 15, 2010
Last NPPES UpdateJune 13, 20213 updates tracked since enumeration
NPPES CertifiedJune 13, 2021
✔ NPI 1639495617 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CO · 0052192
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
Also ListedPsychiatry & Neurology · Psychosomatic MedicineTaxonomy 2084P0015X · License 0052192 (CO)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
10101 RIDGEGATE PKWY, Lone Tree, CO 80124
Open in Google Maps ↗

Other Names 1

Former Name (1)Long Hai Nguyen

Other Identifiers 2

Other028897CO · Kaiser Commercial Number
Medicaid56155204CO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Dan Hai Nguyen M.d. 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.

Medicare Billing Reassignments

2

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

Colorado Permanente Medical Group, P.C.
12 mi
Internal Medicine
10350 E DAKOTA AVE
Denver, CO 80247
  • Reassigned Medicare billing, Colorado enrollment
  • Medicare enrollment name: Colorado Permanente Medical Group PC
  • 1,715 clinicians in this Medicare group
NPI 1760599724 (303) 338-4545
Denver Health And Hospital Authority
15 mi
General Practice
777 BANNOCK ST
Denver, CO 80204
  • Reassigned Medicare billing, Colorado enrollment
  • 2,259 clinicians in this Medicare group
NPI 1477569838 (303) 436-6000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80124 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
$174.82 typical visit price
range $58.06 – $174.82
Typical copayment $43.70 (range $14.51 – $43.70)
Most-billed visit code 99205
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
Most-billed visit code 99213
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.

JAMIE LINKER
Emergency Medicine
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1000
CAREPOINT EMERGENCY MEDICINE, PLLC
Emergency Medicine
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1900
MS. MARY SILVERMAN PUGH NNP
Nurse Practitioner (Neonatal)
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-2200
HEALTHONE CLINIC SERVICES - CARDIOVASCULAR LLC
Internal Medicine (Cardiovascular Disease)
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1000
CONNER FEENEY
Student in an Organized Health Care Education/Training Program
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1000
MATTHEW JAMES LINDEN DO
Student in an Organized Health Care Education/Training Program
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (949) 933-4855
OBSTETRIX MEDICAL GROUP OF COLORADO, P.C.
Pediatrics (Pediatric Cardiology)
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1000
KATELYN ISABELLA KNIGHT PT, DPT
Physical Therapist
10101 RIDGEGATE PKWY
LONE TREE, CO 80124
Douglas County (720) 225-1000

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 Dan Nguyen's NPI number?

The NPI number for Dan Nguyen is 1639495617. It was assigned to this individual provider in the NPPES registry on April 15, 2010. The provider is also known as Long Hai Nguyen.

Where is Dan Nguyen located?

Dan Nguyen practices at 10101 Ridgegate Pkwy, Lone Tree, CO 80124. The listed phone number is (303) 338-4545.

What is Dan Nguyen's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Dan Nguyen enrolled in Medicare?

Yes. Dan Nguyen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Dan Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dan Nguyen reassigns Medicare benefits to 2 organizations: Colorado Permanente Medical Group, P.C. (Denver, CO) and Denver Health And Hospital Authority (Denver, 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 Dan Nguyen'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 Dan Nguyen was last updated on June 13, 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.