DR. NAIHSIEN DAVID CHEN M.D.
NPI 1174699755
Internal Medicine in Modesto, CA

Q: What is Naihsien Chen's NPI number?

The NPI number for Naihsien Chen is 1174699755. It was assigned to this individual provider in the NPPES registry on November 27, 2006. The provider is also known as Dr. David Chen MD.

Q: What is Naihsien Chen's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Naihsien Chen was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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 November 27, 2006PECOS Enrolled

803 COFFEE RD STE 6, MODESTO, CA 95355(626) 888-6000(888) 318-6618 Get Directions Write a Review

NPPES record last updated: January 14, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jan 14, 2026, Jan 7, 2026, Jun 6, 2025 and 4 more (7 updates tracked since 2020).

On this page

About Dr. Naihsien David Chen M.d. NPPES

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

DR. NAIHSIEN DAVID CHEN M.D. (NPI 1174699755) is an individual internal medicine provider in Modesto, California, licensed in California (A73562) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1174699755

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. NAIHSIEN DAVID CHENCredential: M.D.

Location Address803 COFFEE RD STE 6Modesto, CA 95355-4238

Mailing Address5599 Rollins StLas Vegas, NV 89118-6050 · (626) 888-6000 · Fax (888) 316-6618

Phone(626) 888-6000

Fax(888) 318-6618

Sole ProprietorNo

Enumeration DateNovember 27, 2006

Last NPPES UpdateJanuary 14, 20267 updates tracked since enumeration

NPPES CertifiedJanuary 14, 2026

✔ NPI 1174699755 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A73562

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.

Also ListedHospitalistTaxonomy 208M00000X · License A73562 (CA)

803 COFFEE RD STE 6, Modesto, CA 95355

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Other Names 1

Other Name (5)Dr. David Chen Md

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Naihsien David Chen 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

Medicare enrollment records show Naihsien Chen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Golden Health Inc

Same address

Internal Medicine

803 COFFEE RD STE 6
Modesto, CA 95355

Reassigned Medicare billing, California enrollment

NPI 1992052799 (626) 888-6000

American Specialty Physicians Group Inc

1.1 mi

Emergency Medicine

700 17TH ST STE 205
Modesto, CA 95354

Reassigned Medicare billing, California enrollment
180 clinicians in this Medicare group

NPI 1164363024 (877) 346-2211

Merced Hospitalist Medical Group, Inc.

35 mi

Internal Medicine

333 MERCY AVE
Merced, CA 95340

Reassigned Medicare billing, California enrollment
126 clinicians in this Medicare group

NPI 1730431875 (209) 564-5000

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 95355 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

$133.94 typical visit price

range $58.87 – $176.60

Typical copayment $33.48 (range $14.71 – $44.15)

Most-billed visit code 99204

Established Patient

$103.36 typical visit price

range $19.28 – $144.60

Typical copayment $25.84 (range $4.82 – $36.15)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

93%228 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 20

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

Walker, folding, wheeled, adjustable or fixed height E0143

DME-Other DME · category DE000N

1 supplier32 claims32 services$56.97 avg. paid by Medicare

Commode chair, mobile or stationary, with fixed arms E0163

DME-Other DME · category DE000N

1 supplier21 claims21 services$63.48 avg. paid by Medicare

Commode chair, mobile or stationary, with detachable arms E0165

DME-Other DME · category DE000N

2 suppliers139 claims139 services$8.99 avg. paid by Medicare

Powered pressure reducing mattress overlay/pad, alternating, with pump, includes heavy duty E0181

DME-Other DME · category DE000N

1 supplier13 claims13 services$10.60 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

1 supplier86 claims86 services$55.24 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier13 claims13 services$17.82 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

2 suppliers14 claims14 services$5.45 avg. paid by Medicare

Patient lift, electric with seat or sling E0635

DME-Other DME · category DE000N

1 supplier17 claims17 services$89.30 avg. paid by Medicare

Manual wheelchair accessory, wheel lock brake extension (handle), each E0961

DME-Wheelchairs · category DD021N

1 supplier29 claims58 services$21.08 avg. paid by Medicare

Manual wheelchair accessory, anti-tipping device, each E0971

DME-Wheelchairs · category DD021N

1 supplier45 claims88 services$29.53 avg. paid by Medicare

Manual wheelchair accessory, anti-tipping device, each E0971

DME-Wheelchairs · category DD021N

2 suppliers65 claims81 services$2.75 avg. paid by Medicare

Residual limb support system for wheelchair, any type E1020

DME-Wheelchairs · category DD021N

1 supplier15 claims15 services$13.92 avg. paid by Medicare

Wheelchair accessory, manual fully reclining back, (recline greater than 80 degrees), each E1226

DME-Wheelchairs · category DD021N

1 supplier12 claims12 services$35.25 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 suppliers15 claims15 services$90.79 avg. paid by Medicare

General use wheelchair seat cushion, width less than 22 inches, any depth E2601

DME-Wheelchairs · category DD021N

1 supplier56 claims56 services$37.28 avg. paid by Medicare

General use wheelchair back cushion, width less than 22 inches, any height, including any type mounting hardware E2611

DME-Wheelchairs · category DD021N

1 supplier37 claims37 services$159.13 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

2 suppliers513 claims513 services$23.26 avg. paid by Medicare

Standard hemi (low seat) wheelchair K0002

DME-Wheelchairs · category DD000N

1 supplier85 claims85 services$37.39 avg. paid by Medicare

Lightweight wheelchair K0003

DME-Wheelchairs · category DD000N

2 suppliers69 claims69 services$35.10 avg. paid by Medicare

Elevating leg rests, pair (for use with capped rental wheelchair base) K0195

DME-Wheelchairs · category DD021N

1 supplier194 claims194 services$10.17 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 7

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

REECE SPEECH PATHOLOGY SERVICES LLC

Speech-Language Pathologist

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (209) 549-7765

LYNDA REECE M.A., CCC, SLP

Speech-Language Pathologist

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (209) 549-7765

KATHRYN REECE M.S., CCC-SLP

Speech-Language Pathologist

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (209) 549-7765

GOLDEN HEALTH CLINIC

Internal Medicine

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (626) 888-6000

GOLDEN HEALTH MEDICAL INC

Internal Medicine

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (702) 453-3799

RUTH QUEZADA SLP

Speech-Language Pathologist

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (209) 549-7765

GOLDEN HEALTH INC

Internal Medicine

803 COFFEE RD STE 6
MODESTO, CA 95355

Stanislaus County (626) 888-6000

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 Naihsien Chen's NPI number?

The NPI number for Naihsien Chen is 1174699755. It was assigned to this individual provider in the NPPES registry on November 27, 2006. The provider is also known as Dr. David Chen MD.

Where is Naihsien Chen located?

Naihsien Chen practices at 803 Coffee Rd Ste 6, Modesto, CA 95355. The listed phone number is (626) 888-6000.

What is Naihsien Chen's specialty?

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

Is Naihsien Chen enrolled in Medicare?

Yes. Naihsien Chen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Naihsien Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Naihsien Chen reassigns Medicare benefits to 3 organizations: Golden Health Inc (Modesto, CA), American Specialty Physicians Group Inc (Modesto, CA) and Merced Hospitalist Medical Group, Inc. (Merced, 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 Naihsien Chen'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 Naihsien Chen was last updated on January 14, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.