RONALD CHANG M.D.
NPI 1861810863
Hospitalist in Pomona, CA

Q: What is Ronald Chang's NPI number?

The NPI number for Ronald Chang is 1861810863. It was assigned to this individual provider in the NPPES registry on April 7, 2014.

Q: What is Ronald Chang's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Ronald Chang was last updated on October 3, 2018. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since April 07, 2014PECOS EnrolledAccepts Medicare Assignment

1880 N ORANGE GROVE AVE, POMONA, CA 91767(909) 630-7158(909) 630-7983 Get Directions Write a Review

NPPES record last updated: October 3, 2018. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Oct 3, 2018, Sep 14, 2018 (2 updates tracked since 2018).

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About Ronald Chang M.d. NPPES

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

RONALD CHANG M.D. (NPI 1861810863) is an individual hospitalist provider in Pomona, California, licensed in California (A141360) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1861810863

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameRONALD CHANGCredential: M.D.

Location Address1880 N ORANGE GROVE AVEPomona, CA 91767-3006

Mailing Address840 Towne Center DrPomona, CA 91767-5900 · (909) 398-1550 · Fax (909) 398-1488

Phone(909) 630-7158

Fax(909) 630-7983

Sole ProprietorYes

Medical School CMSOtherGraduated 2014

Enumeration DateApril 7, 2014

Last NPPES UpdateOctober 3, 20182 updates tracked since enumeration

✔ NPI 1861810863 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in CA · A141360

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License A141360 (CA)

1880 N ORANGE GROVE AVE, Pomona, CA 91767

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ronald Chang 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 ID8022373117

PECOS Enrollment IDI20180518001965

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.

Areas of Expertise CMS Part B claims 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

362 services137 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

156 services155 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

147 services143 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91767 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 3

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

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

DME-Oxygen and Supplies · category DC000N

2 suppliers22 claims22 services$12.21 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 suppliers22 claims22 services$58.50 avg. paid by Medicare

Standard wheelchair K0001

DME-Wheelchairs · category DD000N

1 supplier12 claims12 services$17.64 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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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.

PATRICK ALONZO

Nurse Practitioner