Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

BAO-THU THI NGUYEN M.D.
NPI 1538137666
Ophthalmology in Long Beach, CA

Q: What is Bao-thu Nguyen's NPI number?

The NPI number for Bao-thu Nguyen is 1538137666. It was assigned to this individual provider in the NPPES registry on March 14, 2006. The provider is also known as Betsy Bao-Thu Thi Nguyen M.D..

Q: What is Bao-thu Nguyen's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Q: When was this NPI record last updated?

The NPPES record for Bao-thu Nguyen was last updated on August 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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 March 14, 2006PECOS EnrolledAccepts Medicare Assignment

78.37/100

CMS Quality Rating

4300 LONG BEACH BLVD STE 400, LONG BEACH, CA 90807(562) 591-7700(562) 591-7700 Get Directions Write a Review

NPPES record last updated: August 12, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 12, 2026, Feb 21, 2022, Jun 22, 2021 and 1 more (4 updates tracked since 2020).

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About Bao-thu Thi Nguyen M.d. NPPES

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

BAO-THU THI NGUYEN M.D. (NPI 1538137666) is an individual ophthalmology provider in Long Beach, California, licensed in California (A62609) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, Geffen School Of Medicine (1995).

NPPES Registry Identity

NPI1538137666

Entity TypeIndividualFemale

Primary Taxonomy207W00000X

Provider Legal NameBAO-THU THI NGUYENCredential: M.D.

Location Address4300 LONG BEACH BLVD STE 400Long Beach, CA 90807-2008

Mailing Address4300 Long Beach Blvd Ste 400Long Beach, CA 90807-2008 · (562) 591-7700 · Fax (562) 591-1311

Phone(562) 591-7700

Fax(562) 591-7700

Sole ProprietorYes

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1995

Enumeration DateMarch 14, 2006

Last NPPES UpdateAugust 12, 20264 updates tracked since enumeration

NPPES CertifiedAugust 12, 2026

✔ NPI 1538137666 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians

Taxonomy Code207W00000X

License✔ Licensed in CA · A62609

Definition

An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.

4300 LONG BEACH BLVD STE 400, Long Beach, CA 90807

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Other Names 1

Other Name (5)Betsy Bao-thu Thi Nguyen M.d.

Secondary Practice Locations 3

Location 115825 Laguna Canyon Rd Ste 201Irvine, CA 92618-2127 · Phone (949) 453-4661 · Fax (714) 771-7126

Location 214726 Ramona Ave Ste 200Chino, CA 91710-5730 · Phone (714) 771-1213 · Fax (714) 771-7126

Location 3363 S Main St Ste 325Orange, CA 92868-3833 · Phone (714) 771-1213 · Fax (714) 771-7126

Other Identifiers 1

Medicaid00A626090CA

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

Bao-thu Thi Nguyen 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 ID2163424722

PECOS Enrollment IDI20070209000653

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 19

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.

1,202 services613 patients

Photography of the retina 92250

Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.

981 services787 patients

Exam of visual field with extended testing 92083

An extended visual field exam is a detailed test to evaluate your peripheral (side) vision. It helps to detect any potential blind spots which may not be noticeable in daily life. These could be caused by eye diseases like glaucoma, or neurological conditions.

608 services527 patients

Imaging of optic nerve 92133

Imaging of the optic nerve is a non-invasive procedure that captures detailed pictures of your optic nerve. It helps doctors assess eye health, particularly for conditions like glaucoma. It's painless, quick, and uses safe technology like MRI or OCT (Optical Coherence Tomography).

540 services508 patients

Injection, bimatoprost, intracameral implant, 1 microgram J7351

This procedure involves placing a tiny implant inside the eye, which releases a drug called bimatoprost. This drug helps to lower high pressure in the eye, typically seen in conditions like glaucoma. It's a safe and effective treatment.

370 services22 patients

Established patient complete exam of visual system 92014

An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.

334 services334 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.

158 services135 patients

Measurement of corneal curvature and depth of eye 92136

This procedure measures the shape and depth of your eye, specifically the cornea, the clear front surface. It helps in diagnosing conditions, planning for surgeries, or fitting contact lenses. It's non-invasive and painless.

157 services118 patients

Laser repair to improve eye fluid flow 65855

Laser repair to improve eye fluid flow is a procedure aimed at treating glaucoma. A laser is used to create a small hole in the eye's drainage system, allowing fluid to flow out more easily. This helps to lower the pressure inside the eye, reducing the risk of vision loss.

155 services104 patients

Exam of the internal drainage system of eye 92020

This is a procedure where your doctor examines the eye's internal drainage system, essential for maintaining eye pressure. They use specialized tools to check for blockages or damage that might lead to conditions like glaucoma. It's non-invasive and painless.

130 services130 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.

120 services120 patients

Ultrasound scan of cornea to determine thickness 76514

An ultrasound scan of the cornea is a non-invasive procedure that uses sound waves to measure the thickness of your cornea. This helps in diagnosing certain eye conditions and planning treatments. No discomfort or pain is typically experienced.

109 services109 patients

Imaging of retina 92134

Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.

96 services93 patients

Removal of cataract with insertion of prosthetic lens 66984

This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.

73 services51 patients

Removal of recurring cataract in lens capsule using a laser 66821

This procedure, known as YAG laser capsulotomy, treats cloudiness in the lens capsule following cataract surgery. A laser is used to create a small hole in the cloudy capsule, allowing light to pass through and restore clear vision. It's a quick, painless procedure.

68 services56 patients

New patient complete exam of visual system 92004

A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.

42 services42 patients

Injection of medication into eye 66030

This procedure involves administering medication directly into your eye. A tiny needle is used to deliver the drug into the vitreous, a jelly-like substance in the eye. It helps treat conditions like macular degeneration or diabetic retinopathy. It's generally safe and effective.

37 services22 patients

Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye 66991

This is a two-part eye procedure. First, a cloudy lens (cataract) is removed from its outer layer and replaced with an artificial lens to improve vision. Second, a drainage device is inserted into the front part of the eye to manage fluid levels, preventing pressure build-up.

37 services28 patients

Dilation of fluid outflow drainage within eye 66174

Dilation to improve eye fluid flow is a process where eye drops are used to widen or dilate your pupils. This allows more fluid to flow out of the eye, reducing pressure and helping to prevent or treat conditions like glaucoma.

21 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90807 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

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

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.

78.37/100

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

Scored as part of a group practice

Quality

100

Improvement Activities

Cost

27.92

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.

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