DR. KAREN MICHELLE UY-UYAN GUIANG D.O.
NPI 1871738344
Internal Medicine - Infectious Disease in Claremont, CA

Q: What is Karen Michelle Guiang's NPI number?

The NPI number for Karen Michelle Guiang is 1871738344. It was assigned to this individual provider in the NPPES registry on December 11, 2008. The provider is also known as Dr. Karen Michelle Uy-Uyan Guiang D.O..

Q: What is Karen Michelle Guiang's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Active since December 11, 2008PECOS EnrolledAccepts Medicare Assignment

36.21/100

CMS Quality Rating

935 W FOOTHILL BLVD, CLAREMONT, CA 91711(626) 851-8880(626) 851-8001 Get Directions Write a Review

NPPES record last updated: April 29, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Karen Michelle Uy-uyan Guiang D.o. NPPES

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

DR. KAREN MICHELLE UY-UYAN GUIANG D.O. (NPI 1871738344) is an individual infectious disease provider in Claremont, California, licensed in California (20A10579) and active in the NPI registry since December 2008. She is enrolled in Medicare PECOS and is a graduate of College Of Osteo Med Of The Pacific At Pomona (2007).

NPPES Registry Identity

NPI1871738344

Entity TypeIndividualFemale

Primary Taxonomy207RI0200X

Provider Legal NameDR. KAREN MICHELLE UY-UYAN GUIANGCredential: D.O.

Location Address935 W FOOTHILL BLVDClaremont, CA 91711-3304

Mailing Address935 W Foothill BlvdClaremont, CA 91711-3304 · (626) 851-8880 · Fax (626) 851-8001

Phone(626) 851-8880

Fax(626) 851-8001

Sole ProprietorNo

Medical School CMSCollege Of Osteo Med Of The Pacific At PomonaGraduated 2007

Enumeration DateDecember 11, 2008

Last NPPES UpdateApril 29, 2020

NPPES CertifiedApril 29, 2020

✔ NPI 1871738344 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in CA · 20A10579

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Also ListedInternal MedicineTaxonomy 207R00000X · License 20A10579 (CA)

935 W FOOTHILL BLVD, Claremont, CA 91711

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Other Names 1

Former Name (1)Dr. Karen Michelle Uy-uyan Guiang D.o.

Other Identifiers 2

MedicaidGR0059520CA

Medicaid20A10579CA

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. Karen Michelle Uy-uyan Guiang D.o. 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 ID2365693850

PECOS Enrollment IDI20121109000205

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 Reassignment

Medicare enrollment records show Karen Michelle Guiang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Streng Bassi Begum And Jiang Medical Corporation

Same address

Infectious Disease

935 W FOOTHILL BLVD
Claremont, CA 91711

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

NPI 1891879532 (626) 851-8880

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 6

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.

4,042 services662 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.

623 services537 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.

479 services110 patients

Infusion, normal saline solution, 250 cc J7050

An infusion of normal saline solution, 250 cc, involves administering a sterile saltwater solution into your body through a vein, usually in your arm. This helps to replenish fluids, maintain hydration, and balance electrolytes in your body.

306 services11 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

153 services11 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.

44 services31 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91711 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.

36.21/100

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

Individually scored

Quality

Improvement Activities

Cost

34.03

Other Providers at the Same Location NPPES 6

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

DEEPTHI KUMARA JAYASEKARA MD

Internal Medicine (Infectious Disease)