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HAROLD HSU M.D.
NPI 1770508111
Internal Medicine in Rosemead, CA

Active since July 13, 2006PECOS EnrolledAccepts Medicare Assignment
8622 GARVEY AVE, SUITE 103, ROSEMEAD, CA 91770(626) 280-6898(626) 280-6899 Get Directions Write a Review

NPPES record last updated: February 27, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Harold Hsu M.d. NPPES

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

HAROLD HSU M.D. (NPI 1770508111) is an individual internal medicine provider in Rosemead, California, licensed in California (A 51859) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1982).

NPPES Registry Identity

NPI1770508111
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameHAROLD HSUCredential: M.D.
Location Address8622 GARVEY AVE, SUITE 103Rosemead, CA 91770-3293
Mailing Address8622 Garvey Ave, Suite 103Rosemead, CA 91770-3293 · (626) 280-6898 · Fax (626) 280-6899
Phone(626) 280-6898
Fax(626) 280-6899
Sole ProprietorYes
Medical School CMSOtherGraduated 1982
Enumeration DateJuly 13, 2006
Last NPPES UpdateFebruary 27, 2020
✔ NPI 1770508111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A 51859
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.
8622 GARVEY AVE, Rosemead, CA 91770
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Other Identifiers 1

Medicaid00A518590CA

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

Harold Hsu 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 ID143361097
PECOS Enrollment IDI20100429000159
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 Harold Hsu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Harold Hsu MD. Incorporated
Same address
Primary Care
8622 GARVEY AVE, SUITE 103
Rosemead, CA 91770
  • Reassigned Medicare billing, California enrollment
NPI 1194041913 (626) 280-6898
Spark Healthcare
0.5 mi
Family Medicine
2712 SAN GABRIEL BLVD
Rosemead, CA 91770
  • Reassigned Medicare billing, California enrollment
  • 4 clinicians in this Medicare group
NPI 1710702253 (626) 701-6676

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 11

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 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.
1,445 services265 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
184 services135 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
115 services22 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
88 services88 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.
71 services14 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.
39 services39 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91770 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 12

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
20 suppliers51 claims100 services$4.61 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
16 suppliers30 claims31 services$0.76 avg. paid by Medicare
Enteral feeding supply kit; pump fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4035
Other-Enteral and Parenteral · category OB006N
4 suppliers27 claims821 services$4.29 avg. paid by Medicare
Enteral formula, nutritionally complete with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4150
Other-Enteral and Parenteral · category OB006N
1 supplier12 claims4,284 services$0.31 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
2 suppliers13 claims6,840 services$0.27 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
4 suppliers28 claims28 services$38.05 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.

DR. CHRISTOPHER MICHAEL WONG MD
Internal Medicine
8622 GARVEY AVE, SUITE 103
ROSEMEAD, CA 91770
Los Angeles County (626) 280-6898
HAROLD HSU MD. INCORPORATED
Clinic/Center (Primary Care)
8622 GARVEY AVE, SUITE 103
ROSEMEAD, CA 91770
Los Angeles County (626) 280-6898
WATSONS PHARMACY INC
Pharmacy (Community/Retail Pharmacy)
8622 GARVEY AVE, STE 102
ROSEMEAD, CA 91770
Los Angeles County (626) 280-2223

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 Harold Hsu's NPI number?

The NPI number for Harold Hsu is 1770508111. It was assigned to this individual provider in the NPPES registry on July 13, 2006.

Where is Harold Hsu located?

Harold Hsu practices at 8622 Garvey Ave Suite 103, Rosemead, CA 91770. The listed phone number is (626) 280-6898.

What is Harold Hsu's specialty?

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

Is Harold Hsu enrolled in Medicare?

Yes. Harold Hsu 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 Harold Hsu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harold Hsu reassigns Medicare benefits to 2 organizations: Harold Hsu MD. Incorporated (Rosemead, CA) and Spark Healthcare (Rosemead, 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 Harold Hsu'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 Harold Hsu was last updated on February 27, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.