DR. DIEP BUI M.D.
NPI 1649400359
Psychiatry & Neurology - Epilepsy in San Antonio, TX

Q: What is Diep Bui's NPI number?

The NPI number for Diep Bui is 1649400359. It was assigned to this individual provider in the NPPES registry on July 16, 2009.

Q: What is Diep Bui's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Epilepsy, with taxonomy code 2084E0001X.

Q: When was this NPI record last updated?

The NPPES record for Diep Bui was last updated on October 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since July 16, 2009PECOS EnrolledAccepts Medicare Assignment

4502 MEDICAL DR FL 10, SAN ANTONIO, TX 78229(210) 743-0670(210) 567-4659 Get Directions Write a Review

NPPES record last updated: October 15, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Diep Bui M.d. NPPES

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

DR. DIEP BUI M.D. (NPI 1649400359) is an individual epilepsy provider in San Antonio, Texas, licensed in Texas (S6141) and active in the NPI registry since July 2009. She is enrolled in Medicare PECOS, is affiliated with University Health System, and is a graduate of Other (2004).

NPPES Registry Identity

NPI1649400359

Entity TypeIndividualFemale

Primary Taxonomy2084E0001X

Provider Legal NameDR. DIEP BUICredential: M.D.

Location Address4502 MEDICAL DR FL 10San Antonio, TX 78229-4402

Mailing Address4502 Medical Dr Fl 10San Antonio, TX 78229-4402 · (210) 743-0670 · Fax (210) 567-4659

Phone(210) 743-0670

Fax(210) 567-4659

Sole ProprietorNo

Medical School CMSOtherGraduated 2004

Enumeration DateJuly 16, 2009

Last NPPES UpdateOctober 15, 2025

NPPES CertifiedOctober 15, 2025

✔ NPI 1649400359 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · EpilepsyAllopathic & Osteopathic Physicians

Taxonomy Code2084E0001X

License✔ Licensed in TX · S6141

Definition

Epilepsy is a subspecialty of neurology focused on the diagnosis and treatment of patients with epilepsy, including new-onset, medically refractory epilepsy, psychogenic nonepileptic seizures, and epilepsy in special populations (the elderly, women, patients with co-morbidities). Epilepsy is a multidisciplinary field that provides comprehensive care of the patient.

Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License S6141 (TX)

4502 MEDICAL DR FL 10, San Antonio, TX 78229

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Other Identifiers 1

Medicaid411686501TX

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Imperial Insurance Companies, Inc..Insurance ›

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. Diep Bui 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 ID1759670243

PECOS Enrollment IDI20200611001563

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 Diep Bui reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Uthscsa Dental School

0.2 mi

Oral and Maxillofacial Surgery

7703 FLOYD CURL DR
San Antonio, TX 78229

Reassigned Medicare billing, Texas enrollment
Medicare enrollment name: University Of Texas Health Science Center At San Antonio
2,397 clinicians in this Medicare group

NPI 1750403887 (210) 567-3274

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 4

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.

Measurement of brain wave activity (eeg), awake and drowsy 95816

Measurement of brain wave activity, also known as an EEG, is a non-invasive test that records electrical patterns in your brain. This procedure is done when you're awake and drowsy to understand how your brain functions during different states of consciousness.

41 services40 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.

35 services20 patients

Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional 95720

This procedure monitors brain wave activity over 12-26 hours using Video EEG (VEEG). It involves recording brain waves and video to detect irregularities. A healthcare professional will review the data and provide a report. It's non-invasive and safe.

32 services18 patients

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.

14 services12 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Health System

Acute Care Hospitals · San Antonio, TX

3/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450213

Location4502 Medical DrSan Antonio, TX 78229 · Bexar County

Emergency services Birthing friendly

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.

Reported Quality Measures

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

99%331 patients4/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

87%319 patients3/55-star benchmark: 99%

Medication Reconciliation

The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.

100%123 patients5/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

73%221 patients4/55-star benchmark: 97%

Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan

Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…

29%216 patients2/55-star benchmark: 97%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user

Patients screenedForUse: 94% · 81 patients

86%81 patients4/55-star benchmark: 98%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

45%221 patients2/55-star benchmark: 100%

Secure Messaging

For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…

5%221 patients1/55-star benchmark: 89%

View, Download, or Transmit (VDT)

At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.

18%221 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 5

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

LIZZA B HERNANDEZ PNP

Nurse Practitioner (Pediatrics)