DAVID DIEP DO
NPI 1487815197
Surgery in Chelsea, MI

Q: What is David Diep's NPI number?

The NPI number for David Diep is 1487815197. It was assigned to this individual provider in the NPPES registry on June 24, 2008.

Q: What is David Diep's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for David Diep was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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 June 24, 2008PECOS EnrolledAccepts Medicare Assignment

14650 E OLD US HIGHWAY 12, SUITE 303, CHELSEA, MI 48118(734) 475-4177(734) 475-3520 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 21, 2025, Nov 3, 2023 (2 updates tracked since 2023).

On this page

About David Diep Do NPPES

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

DAVID DIEP DO (NPI 1487815197) is an individual surgery provider in Chelsea, Michigan, licensed in Michigan (5101017754) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS, is affiliated with Promedica Charles And Virginia Hickman Hospital, and is a graduate of Nova Southeastern Univ College Of Dental Medicine (2008).

NPPES Registry Identity

NPI1487815197

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameDAVID DIEPCredential: DO

Location Address14650 E OLD US HIGHWAY 12, SUITE 303Chelsea, MI 48118

Mailing Address24 Frank Lloyd Wright Drive, Suite J2000Ann Arbor, MI 48105 · (734) 747-6766 · Fax (734) 222-3100

Phone(734) 475-4177

Fax(734) 475-3520

Sole ProprietorNo

Medical School CMSNova Southeastern Univ College Of Dental MedicineGraduated 2008

Enumeration DateJune 24, 2008

Last NPPES UpdateNovember 21, 20252 updates tracked since enumeration

NPPES CertifiedNovember 21, 2025

✔ NPI 1487815197 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in MI · 5101017754

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

14650 E OLD US HIGHWAY 12, Chelsea, MI 48118

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Priority Health.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

David Diep Do 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 ID6709028582

PECOS Enrollment IDI20160912001594

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

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

Iha Health Services Corporation

Same address

Rheumatology

14650 E OLD US HIGHWAY 12, SUITE 301
Chelsea, MI 48118

Reassigned Medicare billing, Michigan enrollment
1,480 clinicians in this Medicare group

NPI 1568842755 (734) 593-5990

Iha Olma Specialty 1 LLC

31 mi

Rheumatology

19000 ST JOES PKWY STE 400
Livonia, MI 48152

Reassigned Medicare billing, Michigan enrollment
74 clinicians in this Medicare group

NPI 1235808494 (734) 426-1931

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.

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

53 services52 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.

52 services51 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

38 services26 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

28 services28 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

25 services25 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.

24 services24 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

21 services15 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.

19 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.

17 services16 patients

Insertion of central venous tube with port (5 years or older) 36561

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

15 services15 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

15 services15 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

13 services13 patients

Removal of gallbladder using an endoscope 47562

This procedure, known as endoscopic gallbladder removal, involves a surgeon using a special tool called an endoscope to remove your gallbladder through small incisions. It's typically done to treat gallstones and related complications. It's a less invasive method, often leading to quicker recovery.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Promedica Charles And Virginia Hickman Hospital

Acute Care Hospitals · Adrian, MI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230005

Location5640 N Adrian HighwayAdrian, MI 49221 · Lenawee County

Emergency services Birthing friendly

Chelsea Hospital

Acute Care Hospitals · Chelsea, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230259

Location775 S Main StChelsea, MI 48118 · Washtenaw County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48118 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

$90.76 typical visit price

range $58.04 – $177.36

Typical copayment $22.69 (range $14.51 – $44.34)

Most-billed visit code 99203

Established Patient

$72.38 typical visit price

range $18.32 – $143.49

Typical copayment $18.09 (range $4.58 – $35.87)

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.

ADAM BENJAMIN AGRANOFF M.D.

Physical Medicine & Rehabilitation

14650 E OLD US HIGHWAY 12, SUITE 203
CHELSEA, MI 48118

Washtenaw County (734) 475-3923

ABIGAIL MARIE LAWINGER PA

Physician Assistant

14650 E OLD US HIGHWAY 12, SUITE 303
CHELSEA, MI 48118

Washtenaw County (734) 475-4177

DANIELLE BROOKE BERTHOLD NP

Nurse Practitioner

14650 E OLD US HIGHWAY 12, SUITE 303
CHELSEA, MI 48118

Washtenaw County (734) 475-4177

MAXWELL BENTLEY SARANEN PA-C

Physician Assistant

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 475-4003

CALISTA MARIE HARBAUGH MD

Colon & Rectal Surgery

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 936-5738

MEHAR KAUR BRAR PA-C

Physician Assistant

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 936-7030

FAZLEOMAR MAHMOOD MD

Internal Medicine (Rheumatology)

14650 E OLD US HIGHWAY 12, SUITE 301
CHELSEA, MI 48118

Washtenaw County (734) 593-5990

CHELSEA COMMUNITY HOSPITAL

Pharmacy (Community/Retail Pharmacy)

14650 E OLD US HIGHWAY 12, SUITE 103
CHELSEA, MI 48118

Washtenaw County (734) 593-5900

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 David Diep's NPI number?

The NPI number for David Diep is 1487815197. It was assigned to this individual provider in the NPPES registry on June 24, 2008.

Where is David Diep located?

David Diep practices at 14650 E Old Us Highway 12 Suite 303, Chelsea, MI 48118. The listed phone number is (734) 475-4177.

What is David Diep's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is David Diep enrolled in Medicare?

Yes. David Diep 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 David Diep's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Diep reassigns Medicare benefits to 2 organizations: Iha Health Services Corporation (Chelsea, MI) and Iha Olma Specialty 1 LLC (Livonia, MI). 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 David Diep's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does David Diep accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list David Diep 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.

Is David Diep affiliated with any hospitals?

According to CMS data, David Diep is affiliated with Promedica Charles And Virginia Hickman Hospital and Chelsea Hospital.

When was this NPI record last updated?

The NPPES record for David Diep was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.