DR. AARON I-LUN JENG MD, MPH
NPI 1003053851
Internal Medicine in San Gabriel, CA

Q: What is Aaron Jeng's NPI number?

The NPI number for Aaron Jeng is 1003053851. It was assigned to this individual provider in the NPPES registry on January 15, 2009.

Q: What is Aaron Jeng'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 Aaron Jeng was last updated on August 5, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 January 15, 2009PECOS EnrolledAccepts Medicare Assignment

12.82/100

CMS Quality Rating

438 W LAS TUNAS DR, SAN GABRIEL, CA 91776(626) 289-5454 Get Directions Write a Review

NPPES record last updated: August 5, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Aaron I-lun Jeng Md, Mph NPPES

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

DR. AARON I-LUN JENG MD, MPH (NPI 1003053851) is an individual internal medicine provider in San Gabriel, California, licensed in California (A106414) and active in the NPI registry since January 2009. He is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2007).

NPPES Registry Identity

NPI1003053851

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. AARON I-LUN JENGCredential: MD, MPH

Location Address438 W LAS TUNAS DRSan Gabriel, CA 91776-1216

Mailing AddressPo Box 5801Pasadena, CA 91117-0801 · (626) 786-1343

Phone(626) 289-5454

Sole ProprietorYes

Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 2007

Enumeration DateJanuary 15, 2009

Last NPPES UpdateAugust 5, 2015

✔ NPI 1003053851 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 · A106414

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.

438 W LAS TUNAS DR, San Gabriel, CA 91776

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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

Dr. Aaron I-lun Jeng Md, Mph 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 ID1658567524

PECOS Enrollment IDI20101118000647

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 Aaron Jeng reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Aaron I Jeng MD Inc

5.3 mi

General Acute Care Hospital

3006 S 9TH AVE
Arcadia, CA 91006

Reassigned Medicare billing, California enrollment

NPI 1164831293 (626) 786-1343

Hastings Ranch Physicians Group, Inc.

9.1 mi

Internal Medicine

1113 FOOTHILL BLVD, #A
La Canada Flintridge, CA 91011

Reassigned Medicare billing, California enrollment

NPI 1285114157 (818) 369-7848

La Canada Medical Group Inc

9.2 mi

Internal Medicine

1150 FOOTHILL BLVD STE C
La Canada Flintridge, CA 91011

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

NPI 1386537744 (818) 369-7848

Ae Urgent Care - Van Nuys

21 mi

Urgent Care

14614 VICTORY BLVD
Van Nuys, CA 91411

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

NPI 1265172266 (747) 264-1212

Texas Wound Solutions Inc

1,196 mi

Specialist

8626 TESORO DR STE 205
San Antonio, TX 78217

Reassigned Medicare billing, Texas enrollment
2 clinicians in this Medicare group

NPI 1467209700 (726) 266-1950

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 21

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.

Membrane graft or membrane wrap, per square centimeter Q4205

A membrane graft or wrap is a surgical procedure where a special material is used to replace or support damaged tissue. This material, measured per square centimeter, acts like a scaffold, helping your body to regenerate healthy tissue in the affected area.

84,105 services403 patients

Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less 15271

This procedure involves applying a skin substitute graft to a wound on the trunk, arms, or legs. The graft, a lab-grown skin, is used to cover a wound area of 25.0 sq cm or less, within a total wound area of 100.0 sq cm or less. It aids in healing and regeneration.

2,572 services383 patients

Removal of skin and tissue, 20.0 sq cm or less 11042

This procedure involves the surgical removal of skin and tissue, up to 20.0 square cm in size. It's often performed to treat conditions like skin cancer or to remove moles, warts, and other skin lesions. The area is numbed and the unwanted tissue is carefully cut out.

2,417 services356 patients

Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes 99348

An established patient home visit is a 25-minute appointment where a healthcare provider visits you at your home. This service is for patients who have previously been seen by the provider. It includes a check-up and discussion about your health concerns.

2,239 services370 patients

Removal of skin and tissue, each additional 20.0 sq cm or less 11045

This procedure involves the removal of skin and tissue, typically due to disease, injury, or abnormal growth. Each session removes an area of 20.0 square cm or less. It's performed by a trained professional and may require multiple sessions for larger areas.

1,697 services126 patients

Application of skin substitute graft to wound of trunk, arms, or legs, each additional 25.0 sq cm of wound 100.0 sq cm or less 15272

This procedure involves applying a skin substitute graft to a wound on your trunk, arms, or legs. The graft, which is a type of artificial skin, helps promote healing by covering the wound. This description refers to additional grafts for wounds up to 100 sq cm.

1,651 services181 patients

Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, 25.0 sq cm or less of wound 100.0 sq cm or less 15275

This procedure involves applying a skin substitute graft to a wound that's 25.0 sq cm or less, located on areas such as the face, scalp, eyelids, mouth, neck, ears, around eyes, hands, feet, fingers, or toes. The graft aids in wound healing and tissue regeneration.

1,055 services166 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.

491 services145 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

386 services73 patients

Application of skin substitute graft to wound of face, scalp, eyelids, mouth, neck, ears, around eyes, genitals, hands, feet, fingers, or toes, each additional 25.0 sq cm of wound 100.0 sq cm or less 15276

This procedure involves applying a skin-like material to a wound on specific body areas to aid healing. The material, which mimics real skin, helps promote new skin growth. It's used for wounds of up to 100 sq cm, with each additional 25 sq cm treated separately.

257 services46 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.

194 services149 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.

111 services69 patients

Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes 99348

89 services13 patients

Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes 99344

A new patient home visit is a comprehensive service where a healthcare professional visits your home for about an hour. This visit includes an overall health assessment, discussion about your medical history, and planning for future healthcare needs. The goal is to understand your health status and provide personalized care.

88 services88 patients

Removal of skin and tissue, 20.0 sq cm or less 11042

85 services15 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

41 services41 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.

30 services26 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.

26 services26 patients

Removal of tissue from wound, 20.0 sq cm or less 97597

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

23 services12 patients

Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438

An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.

18 services18 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91776 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.

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.

12.82/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Cost

42.74

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…

100%78 patients5/55-star benchmark: 100%

Cervical Cancer Screening

Percentage of women 21-64 years of age who were screened for cervical cancer using either of the following criteria: - Women age 21-64 who had cervical cytology performed every 3 years - Women age 30-64 who had cervical cytology/human papillomavirus (HPV)…

11%28 patients

Colorectal Cancer Screening

Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer

16%85 patients1/55-star benchmark: 85%

Diabetes: Medical Attention for Nephropathy

The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period

98%49 patients4/55-star benchmark: 99%

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

63%261 patients1/55-star benchmark: 100%

Falls: Screening for Future Fall Risk

Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period

100%120 patients5/55-star benchmark: 99%

Pneumococcal Vaccination Status for Older Adults

Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine

15%127 patients1/55-star benchmark: 90%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

40%169 patients2/55-star benchmark: 97%

Preventive Care and Screening: Influenza Immunization

Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization

21%144 patients1/55-star benchmark: 88%

Preventive Care and Screening: Screening for Depression and Follow-Up Plan

Percentage of patients aged 12 years and older screened for depression on the date of the encounter using an age appropriate standardized depression screening tool AND if positive, a follow-up plan is documented on the date of the positive screen

7%138 patients1/55-star benchmark: 96%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user

Patients tobacco: 89% · 27 patients

93%27 patients

Use of High-Risk Medications in the Elderly

Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.

Lower rates are better for this measure.

Patients 2+: 2% · 127 patients

35%127 patients1/55-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 15

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

7 suppliers11 claims27 services$5.83 avg. paid by Medicare

Tape, waterproof, per 18 square inches A4452

DME-Medical/Surgical Supplies · category DA000N

1 supplier12 claims3,168 services$0.37 avg. paid by Medicare

Collagen based wound filler, dry form, sterile, per gram of collagen A6010

DME-Medical/Surgical Supplies · category DA023N

1 supplier12 claims420 services$29.97 avg. paid by Medicare

Gauze, impregnated with other than water, normal saline, or hydrogel, sterile, pad size more than 16 sq. in., but less than or equal to 48 sq. in., without adhesive border, each dressing A6223

DME-Medical/Surgical Supplies · category DA023N

1 supplier11 claims330 services$2.34 avg. paid by Medicare

Conforming bandage, non-elastic, knitted/woven, sterile, width greater than or equal to three inches and less than five inches, per yard A6446

DME-Medical/Surgical Supplies · category DA023N

1 supplier12 claims1,476 services$0.37 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

3 suppliers26 claims779 services$4.37 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 20

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

IVOR GREEN M.D. A PROFESSIONAL CORPORATION

Anesthesiology