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DR. THIRI T OO M.D.
NPI 1619256617
Internal Medicine in Claremont, CA

Active since August 08, 2011PECOS EnrolledAccepts Medicare Assignment
250 W SAN JOSE AVE, CLAREMONT, CA 91711(833) 574-2273 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 1, 2021, Aug 17, 2019, Jul 15, 2019 and 1 more (4 updates tracked since 2019).

About Dr. Thiri T Oo M.d. NPPES

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

DR. THIRI T OO M.D. (NPI 1619256617) is an individual internal medicine provider in Claremont, California, licensed in California (A117718) and active in the NPI registry since August 2011. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1619256617
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. THIRI T OOCredential: M.D.
Location Address250 W SAN JOSE AVEClaremont, CA 91711-5207
Mailing Address250 W San Jose AveClaremont, CA 91711-5207 · (833) 574-2273
Phone(833) 574-2273
Sole ProprietorYes
Medical School CMSOtherGraduated 2009
Enumeration DateAugust 8, 2011
Last NPPES UpdateDecember 1, 20214 updates tracked since enumeration
NPPES CertifiedDecember 1, 2021
✔ NPI 1619256617 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 · A117718
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.
250 W SAN JOSE AVE, Claremont, CA 91711
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Other Names 1

Other Name (5)Thiri T Oo

Secondary Practice Locations 3

Location 18311 Florence AveDowney, CA 90240-3928 · Phone (562) 923-4911
Location 21200 N State St, Clinic Tower A7DLos Angeles, CA 90033-1029 · Phone (323) 226-7556
Location 3831 E Huntington Dr Ste 101Monrovia, CA 91016-6423 · Phone (626) 358-0269

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

Dr. Thiri T Oo 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 ID446496392
PECOS Enrollment IDI20130418000493
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.

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.

Other Providers at the Same Location NPPES 8

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

MONICA HAN
Pharmacist
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (909) 399-2086
JOHN CHEUNG
Pharmacist
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (909) 399-2086
JONATHAN PUI-KAY SIU D.O.
Family Medicine
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (888) 750-0036
DR. LOURDES MINAYA MD
Pediatrics
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (888) 750-0036
JESSICA MY NGO MD
Family Medicine
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (909) 399-2095
KAISER FOUNDATION HEALTH PLAN INC
Pharmacy (Community/Retail Pharmacy)
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (866) 889-8555
MARIANA YU
Pharmacist
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (909) 399-2086
DR. JIN HEWA PARK D.O.
Family Medicine
250 W SAN JOSE AVE
CLAREMONT, CA 91711
Los Angeles County (909) 399-2063

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 Thiri Oo's NPI number?

The NPI number for Thiri Oo is 1619256617. It was assigned to this individual provider in the NPPES registry on August 8, 2011. The provider is also known as Thiri T Oo.

Where is Thiri Oo located?

Thiri Oo practices at 250 W San Jose Ave, Claremont, CA 91711. The listed phone number is (833) 574-2273.

What is Thiri Oo's specialty?

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

Is Thiri Oo enrolled in Medicare?

Yes. Thiri Oo 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.

When was this NPI record last updated?

The NPPES record for Thiri Oo was last updated on December 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.