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 683 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
609
Medicare Part D claims · 101 beneficiaries · Addiction Psychiatry Physician avg: 789
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Gary Drouillard, M.D. filed 609 Medicare Part D claims in 2024 as an Addiction Psychiatry Physician in San Antonio, Texas, prescribing 94% generic.
- 609
- Part D claims, 2024
- 94%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Gary Drouillard, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1306836671), first enumerated 10/26/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 609 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Gary Drouillard, M.D.'s individual license status. Verify directly with the state medical board.
Source: TMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1306836671 · Addiction Psychiatry Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1306836671
- ENUM-LEGACY 2005
- TAX-NARROW 683
- RX-LIGHT 609
- BOOK-THIN 38 in Texas
- PHOTO-ENUM Melinda Lantz, MD · 2005
Gary Drouillard, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
609 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
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
609 23% 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).
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.
Brand vs generic prescribing mix · Generic-heavy
Gary Drouillard, M.D. - brand share 6.0%
Addiction Psychiatry Physician average
6% brand-name claims vs 94% generic, on 609 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
609
Total Claims
$19K
Total Drug Cost
101
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 614.267
- Total Day Supply
- 9,881
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $12K
- Generic Drug Cost
- $7K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 48.5 years
- Avg HCC Risk Score
- 1.92
- Gender Split
- 37% female / 63% male
- Age Distribution
- <65: 86, 65-74: 15, 75-84: 0, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Gary Drouillard, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Trazodone Hcl
Trazodone Hcl
39 claims
- Quetiapine Fumarate
Quetiapine Fumarate
27 claims
- Gabapentin
Gabapentin
26 claims
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
25 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
23 claims
- Escitalopram Oxalate
Escitalopram Oxalate
22 claims
- Lisinopril
Lisinopril
22 claims
- Pantoprazole Sodium
Pantoprazole Sodium
18 claims
| Drug | Claims |
|---|---|
| Trazodone Hcl | 39 |
| Quetiapine Fumarate | 27 |
| Gabapentin | 26 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 25 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 23 |
| Escitalopram Oxalate | 22 |
| Lisinopril | 22 |
| Pantoprazole Sodium | 18 |
| Aripiprazole | 17 |
| Amlodipine Besylate | 15 |
* 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.
683
Addiction Psychiatry Physician Providers in US
49
States with Addiction Psychiatry Physician
789
Avg Claims per Provider
Gary Drouillard, M.D.'s 609 claims are below the specialty average of 789.
Nationwide Addiction Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Drouillard, both outside Texas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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.
One of 38 Addiction Psychiatry Physician providers enrolled in Texas, 5 are shown here.
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 →
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 2024, Gary Drouillard, M.D. wrote 609 Medicare Part D claims totaling $19K in drug costs for 101 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.
Does Gary Drouillard, M.D. prescribe more brand-name or generic drugs? ▼
Gary Drouillard, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $12K in brand drug costs.
How many Addiction Psychiatry Physician providers are there in the US? ▼
There are 683 Addiction Psychiatry Physician providers across 49 states in the US. The average Addiction Psychiatry Physician provider writes 789 Medicare Part D claims per year.
What drugs does Gary Drouillard, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Gary Drouillard, M.D.'s most frequently prescribed drugs include Trazodone Hcl, Quetiapine Fumarate, Gabapentin. 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 609 Part D claims and 101 Medicare beneficiaries in 2024. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.