DR. DIEP D NGUYEN DO
NPI 1417140468
Internal Medicine - Endocrinology, Diabetes & Metabolism in Allentown, PA

Q: What is Diep Nguyen's NPI number?

The NPI number for Diep Nguyen is 1417140468. It was assigned to this individual provider in the NPPES registry on August 23, 2007. The provider is also known as Diep H Dinh Do.

Q: What is Diep Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Diep Nguyen was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since August 23, 2007PECOS Enrolled

3435 WINCHESTER RD, ALLENTOWN, PA 18104(610) 861-8080 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Mar 7, 2023, Feb 14, 2022 (2 updates tracked since 2022).

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About Dr. Diep D Nguyen Do NPPES

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

DR. DIEP D NGUYEN DO (NPI 1417140468) is an individual endocrinology, diabetes & metabolism provider in Allentown, Pennsylvania, licensed in Pennsylvania (OS015018) and active in the NPI registry since August 2007. She is enrolled in Medicare PECOS, is affiliated with St Luke's Hospital Bethlehem, and maintains a secondary practice location in Allentown.

NPPES Registry Identity

NPI1417140468

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameDR. DIEP D NGUYENCredential: DO

Location Address3435 WINCHESTER RDAllentown, PA 18104-2268

Mailing AddressPo Box 783311Philadelphia, PA 19178-3311 · (484) 884-4500

Phone(610) 861-8080

Sole ProprietorNo

Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2006

Enumeration DateAugust 23, 2007

Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration

NPPES CertifiedFebruary 14, 2022

✔ NPI 1417140468 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in PA · OS015018

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

3435 WINCHESTER RD, Allentown, PA 18104

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Other Names 1

Former Name (1)Diep H Dinh Do

Secondary Practice Location 1

Location 11243 S Cedar Crest Blvd Ste 2800Allentown, PA 18103-6230 · Phone (610) 402-6790 · Fax (610) 402-6979

Other Identifiers 1

OtherOS015018PA · Pa

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Diep D Nguyen Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8325162647

PECOS Enrollment IDI20100824000225

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 Reassignment

Medicare enrollment records show Diep Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Hazleton Professional Services

32 mi

Internal Medicine

700 EAST BROAD STREET
Hazleton, PA 18201

Reassigned Medicare billing, Pennsylvania enrollment
305 clinicians in this Medicare group

NPI 1952464638 (570) 501-4584

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 13

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, denosumab, 1 mg J0897

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

1,800 services19 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.

445 services273 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251

This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.

115 services59 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

90 services34 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

50 services23 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

31 services31 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

29 services26 patients

Fine needle aspiration biopsy using ultrasound guidance, first growth 10005

Fine needle aspiration biopsy with ultrasound guidance is a procedure where a thin needle is inserted into a growth to extract a small sample. Ultrasound helps accurately locate the growth. This sample is then analyzed to determine the nature of the growth.

27 services26 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

20 services18 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.

19 services19 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.

18 services17 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

16 services16 patients

Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with provider supplied equipment 95250

This process involves a tiny sensor placed under your skin that checks your blood sugar levels in tissue fluid regularly. The sensor sends these readings to a device, allowing you to track your levels in real-time. This is provided by your healthcare provider.

12 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Luke's Hospital Bethlehem

Acute Care Hospitals · Bethlehem, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390049

Location801 Ostrum StreetBethlehem, PA 18015 · Northampton County

Emergency services Birthing friendly

Lehigh Valley Hospital

Acute Care Hospitals · Allentown, PA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390133

Location1200 South Cedar Crest BoulevardAllentown, PA 18103 · Lehigh County

Emergency services Birthing friendly

Lehigh Valley Hospital - Pocono

Acute Care Hospitals · East Stroudsburg, PA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390201

Location206 East Brown StreetEast Stroudsburg, PA 18301 · Monroe County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 18104 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

$126.34 typical visit price

range $54.64 – $166.87

Typical copayment $31.58 (range $13.66 – $41.71)

Most-billed visit code 99204

Established Patient

$96.82 typical visit price

range $17.33 – $135.84

Typical copayment $24.20 (range $4.33 – $33.96)

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 7

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

Supplies for maintenance of insulin infusion catheter, per week A4224

DME-Other DME · category DE017N

5 suppliers49 claims634 services$18.20 avg. paid by Medicare

Supplies for external insulin infusion pump, syringe type cartridge, sterile, each A4225

DME-Other DME · category DE017N

6 suppliers49 claims1,630 services$2.34 avg. paid by Medicare

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

33 suppliers98 claims335 services$5.65 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

20 suppliers46 claims71 services$1.01 avg. paid by Medicare

External ambulatory infusion pump, insulin E0784

DME-Other DME · category DE017N

2 suppliers15 claims15 services$292.19 avg. paid by Medicare

Insulin for administration through dme (i.e., insulin pump) per 50 units J1817

Treatment-Injections and Infusions (nononcologic) · category RI000N

6 suppliers16 claims2,100 services$7.04 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 3

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

SHARIN P KELLEY CRNP

Nurse Practitioner (Gerontology)

3435 WINCHESTER RD
ALLENTOWN, PA 18104

Lehigh County (610) 402-0100

SUNSHINE FACHET MS OTR/L

Occupational Therapist

3435 WINCHESTER RD
ALLENTOWN, PA 18104

Lehigh County (610) 861-8080

ANDREW TIMOTHY HILL CRNP, FNP-C

Nurse Practitioner (Family)

3435 WINCHESTER RD
ALLENTOWN, PA 18104

Lehigh County (610) 402-0100

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 Diep Nguyen's NPI number?

The NPI number for Diep Nguyen is 1417140468. It was assigned to this individual provider in the NPPES registry on August 23, 2007. The provider is also known as Diep H Dinh Do.

Where is Diep Nguyen located?

Diep Nguyen practices at 3435 Winchester Rd, Allentown, PA 18104. The listed phone number is (610) 861-8080.

What is Diep Nguyen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Diep Nguyen enrolled in Medicare?

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

Which organization bills Medicare for Diep Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diep Nguyen reassigns Medicare benefits to Hazleton Professional Services (Hazleton, PA). The 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 Diep Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Diep Nguyen affiliated with any hospitals?

According to CMS data, Diep Nguyen is affiliated with St Luke's Hospital Bethlehem, Lehigh Valley Hospital and Lehigh Valley Hospital - Pocono.

When was this NPI record last updated?

The NPPES record for Diep Nguyen was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.