NPI registry status
Active
2026 NPPES data Addiction Psychiatry Physician NPI 1306836671 M.D.
Verify on CMS → Gary Drouillard, M.D.
Addiction Psychiatry Physician in San Antonio, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 666 in Addiction Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
587
Medicare Part D claims · 107 beneficiaries · Addiction Psychiatry Physician avg: 792
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gary Drouillard, M.D. filed 587 Medicare Part D claims in 2023 as a Addiction Psychiatry Physician in San Antonio, Texas.
- 587
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Gary Drouillard, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
587 Top 34% higher than 66% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Gary Drouillard, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Gary Drouillard, M.D.?
Quality data not reportedPrimary specialty
Addiction Psychiatry Physician
Medicare Part D claims
587 26% vs specialty avg
Specialty distribution in Texas
How Addiction Psychiatry Physician compares to other specialties among Texas providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Addiction Psychiatry Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Gary Drouillard, M.D. appears in the CMS NPPES registry as an Addiction Psychiatry Physician provider holding M.D. credentials at 8550 HUEBNER RD, San Antonio, TX, 78240, with a listed phone of (210) 541-5300. NPI 1306836671 was issued on 10/26/2005.
Medicare Part D records for calendar year 2023 show 587 prescription claims written by this provider, covering 107 Medicare beneficiaries and totaling roughly $42K in drug spend.
Addiction Psychiatry Physician is a narrow specialty nationwide, with 666 enrolled providers across 49 states and an average of 792 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1306836671 |
|---|---|
| Specialty | Addiction Psychiatry Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/26/2005 |
Hospital and facility affiliations
Facilities where Gary Drouillard, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Southwest Psychiatric Services
San Antonio, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Texas TMB 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~77K Texas medical licensees in 2023 - they are NOT specific to Gary Drouillard, M.D.. To verify Gary Drouillard, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
587
Total Claims
$42K
Total Drug Cost
107
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 594
- Total Day Supply
- 10,271
- Generic Drug Cost
- $9K
- Antibiotic Claims
- 16
Patient Demographics
- Average Patient Age
- 51.0 years
- Avg HCC Risk Score
- 2.12
- Gender Split
- 36% female / 64% male
- Age Distribution
- <65: 87, 65-74: 19, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gary Drouillard, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Quetiapine Fumarate
Quetiapine Fumarate
43 claims
- Gabapentin
Gabapentin
33 claims
- Trazodone Hcl
Trazodone Hcl
30 claims
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
28 claims
- Atorvastatin Calcium
Atorvastatin Calcium
21 claims
- Zolpidem Tartrate
Zolpidem Tartrate
21 claims
- Escitalopram Oxalate
Escitalopram Oxalate
18 claims
- Albuterol Sulfate … 17
Albuterol Sulfate Hfa
17 claims
| Drug | Claims |
|---|---|
| Quetiapine Fumarate | 43 |
| Gabapentin | 33 |
| Trazodone Hcl | 30 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 28 |
| Atorvastatin Calcium | 21 |
| Zolpidem Tartrate | 21 |
| Escitalopram Oxalate | 18 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 17 |
| Aripiprazole | 16 |
| Lisinopril | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Addiction Psychiatry Physician Overview
How Gary Drouillard, M.D. fits within the Addiction Psychiatry Physician landscape nationally.
666
Addiction Psychiatry Physician Providers in US
49
States with Addiction Psychiatry Physician
792
Avg Claims per Provider
Gary Drouillard, M.D.'s 587 claims are below the specialty average of 792.
Nearby Addiction Psychiatry Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Drouillard.
Dr. Bryon Adinoff
M.D.
Dallas, TX
Dr. Selina Akhter
MD
Houston, TX
Dr. Anthony Damico
DO
Jbsa Lackland, TX
Dr. Susan Delaney
MD
Dallas, TX
Dr. Fabrizzio Delgado Ramos
M.D.
Dallas, TX
Compare Addiction Psychiatry Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Addiction Psychiatry Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Gary Drouillard, M.D.'s specialty? ▼
Gary Drouillard, M.D. specializes in Addiction Psychiatry Physician and practices in San Antonio, Texas. Credentials: M.D..
How much does Gary Drouillard, M.D. prescribe under Medicare Part D? ▼
In 2023, Gary Drouillard, M.D. wrote 587 Medicare Part D claims totaling $42K in drug costs for 107 beneficiaries.
Where is Gary Drouillard, M.D. located? ▼
Gary Drouillard, M.D. is located at 8550 HUEBNER RD, San Antonio, TX, 78240. Phone: (210) 541-5300.
What is Gary Drouillard, M.D.'s NPI number? ▼
Gary Drouillard, M.D.'s National Provider Identifier (NPI) is 1306836671, issued on 10/26/2005.
How many Addiction Psychiatry Physician providers are there in the US? ▼
There are 666 Addiction Psychiatry Physician providers across 49 states in the US. The average Addiction Psychiatry Physician provider writes 792 Medicare Part D claims per year.
What drugs does Gary Drouillard, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gary Drouillard, M.D.'s most frequently prescribed drugs include Quetiapine Fumarate, Gabapentin, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gary Drouillard, M.D. accept Medicare? ▼
Gary Drouillard, M.D. appears in CMS Medicare data with 587 Part D claims and 107 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gary Drouillard, M.D.'s credentials? ▼
Gary Drouillard, M.D.'s NPI is 1306836671 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.