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DR. JEFFREY ROBERT UNGER M.D.
NPI 1003856188
Internal Medicine - Endocrinology, Diabetes & Metabolism in Rancho Cucamonga, CA

Active since June 07, 2006PECOS EnrolledCLIA 05D1087438 · Waiver
9220 HAVEN AVE STE 230, RANCHO CUCAMONGA, CA 91730(909) 590-8409(909) 590-8695 Get Directions Write a Review

NPPES record last updated: May 18, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: May 18, 2026, Jan 9, 2025 (2 updates tracked since 2025).

About Dr. Jeffrey Robert Unger M.d. NPPES

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

DR. JEFFREY ROBERT UNGER M.D. (NPI 1003856188) is an individual endocrinology, diabetes & metabolism provider in Rancho Cucamonga, California, licensed in California (G45569) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through February 8, 2027, and is a graduate of Northwestern University Feinberg Medical School (1980).

NPPES Registry Identity

NPI1003856188
Entity TypeIndividualMale
Primary Taxonomy207RE0101X
Provider Legal NameDR. JEFFREY ROBERT UNGERCredential: M.D.
Location Address9220 HAVEN AVE STE 230Rancho Cucamonga, CA 91730-8565
Mailing Address9220 Haven Ave Ste 230Rancho Cucamonga, CA 91730-8565 · (909) 484-2105 · Fax (909) 590-8695
Phone(909) 590-8409
Fax(909) 590-8695
Sole ProprietorYes
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 1980
Enumeration DateJune 7, 2006
Last NPPES UpdateMay 18, 20262 updates tracked since enumeration
NPPES CertifiedMay 18, 2026
✔ NPI 1003856188 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in CA · G45569
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedFamily MedicineTaxonomy 207Q00000X · License G45569 (CA)
9220 HAVEN AVE STE 230, Rancho Cucamonga, CA 91730
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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 (PECOS)

Dr. Jeffrey Robert Unger M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8820092844
PECOS Enrollment IDI20081010000546
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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D1087438

Jeffrey R Unger Unger Primary Care Medical Center · Rancho Cucamonga, CA
Active · expires Feb 8, 2027
CLIA Number05D1087438
Laboratory TypePhysician Office
Certificate Effective DateFebruary 9, 2025
Certificate Expiration DateFebruary 8, 2027
Laboratory DirectorJeffrey R. Unger MD
Laboratory Phone(909) 590-8409
Laboratory LocationJeffrey R Unger Unger Primary Care Medical Center9220 Haven Ave Ste 230, Rancho Cucamonga, CA 91730
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 12

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.
254 services62 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.
164 services52 patients
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251
This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.
90 services27 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
73 services50 patients
Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301
Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.
63 services14 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.
61 services40 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91730 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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 5

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

Supplies for maintenance of insulin infusion catheter, per week A4224
DME-Other DME · category DE017N
7 suppliers39 claims472 services$17.60 avg. paid by Medicare
Supplies for external insulin infusion pump, syringe type cartridge, sterile, each A4225
DME-Other DME · category DE017N
7 suppliers39 claims1,180 services$2.17 avg. paid by Medicare
Continuous positive airway pressure (cpap) device E0601
DME-Other DME · category DE001N
1 supplier11 claims11 services$23.95 avg. paid by Medicare
External ambulatory infusion pump, insulin E0784
DME-Other DME · category DE017N
3 suppliers42 claims42 services$302.83 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
9 suppliers215 claims220 services$184.58 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Jeffrey Unger's NPI number?

The NPI number for Jeffrey Unger is 1003856188. It was assigned to this individual provider in the NPPES registry on June 7, 2006.

Where is Jeffrey Unger located?

Jeffrey Unger practices at 9220 Haven Ave Ste 230, Rancho Cucamonga, CA 91730. The listed phone number is (909) 590-8409.

What is Jeffrey Unger's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Jeffrey Unger enrolled in Medicare?

Yes. Jeffrey Unger is registered in the Medicare PECOS enrollment system.

Does Jeffrey Unger hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D1087438) is associated with this NPI, valid through February 8, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Jeffrey Unger was last updated on May 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.