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DR. KHAI DO M.D.
NPI 1396939526
Internal Medicine in Santa Ana, CA

Active since August 30, 2007PECOS EnrolledAccepts Medicare Assignment
2021 E 4TH ST STE 104, SANTA ANA, CA 92705(909) 621-3012(909) 621-3015 Get Directions Write a Review

NPPES record last updated: June 23, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Khai Do M.d. NPPES

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

DR. KHAI DO M.D. (NPI 1396939526) is an individual internal medicine provider in Santa Ana, California, licensed in California (A42932) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and is a graduate of Louisiana State University School Of Medicine In New Orleans (1985).

NPPES Registry Identity

NPI1396939526
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. KHAI DOCredential: M.D.
Location Address2021 E 4TH ST STE 104Santa Ana, CA 92705-3912
Mailing Address9880 Central AveMontclair, CA 91763-2817 · (909) 621-3012 · Fax (909) 621-3016
Phone(909) 621-3012
Fax(909) 621-3015
Sole ProprietorNo
Medical School CMSLouisiana State University School Of Medicine In New OrleansGraduated 1985
Enumeration DateAugust 30, 2007
Last NPPES UpdateJune 23, 2026
NPPES CertifiedJune 23, 2026
✔ NPI 1396939526 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 · A42932
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.
2021 E 4TH ST STE 104, Santa Ana, CA 92705
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Other Identifiers 1

OtherA42932CA · License Number

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. Khai Do 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 ID7214112390
PECOS Enrollment IDI20110505000300
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 92705 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.

Referred Medical Equipment & Supplies CMS DME claims 2

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
4 suppliers36 claims56 services$4.41 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
4 suppliers27 claims27 services$0.71 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 Khai Do's NPI number?

The NPI number for Khai Do is 1396939526. It was assigned to this individual provider in the NPPES registry on August 30, 2007.

Where is Khai Do located?

Khai Do practices at 2021 E 4th St Ste 104, Santa Ana, CA 92705. The listed phone number is (909) 621-3012.

What is Khai Do's specialty?

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

Is Khai Do enrolled in Medicare?

Yes. Khai Do 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 Khai Do was last updated on June 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 60 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.