John Brennan, M.D, P.A.
NPI 1336123173 · Psychiatry Physician · Dallas, TX
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Brennan, M.D, P.A. is a Psychiatry Physician provider in Dallas, TX (NPI 1336123173).
Provider details
- NPI number
- 1336123173
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D, P.A.
- Sex
- Male
- Sole proprietor
- Yes
- License
- J3750 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
708 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 276 | $90 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 251 | $71 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 181 | $126 |
Typical Medicare-allowed amounts for these services range $71–$126 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 339 | 56 |
| Alprazolam | 318 | 45 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 267 | 52 |
| Trazodone Hcl | 241 | 63 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 196 | 50 |
| Zolpidem Tartrate | 178 | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,518 across 114 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-05
- Last updated
- 2025-12-02
- Certified
- 2025-12-02
Frequently asked questions
- What is John Brennan's NPI number?
- John Brennan's National Provider Identifier (NPI) is 1336123173, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Brennan's specialty?
- John Brennan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Brennan located?
- John Brennan's practice location on file with NPPES is 7557 Rambler Rd Ste 565, Dallas, TX 75231-2373.
- What is John Brennan's phone number?
- The practice phone number listed in the NPPES registry for John Brennan is (214) 824-2273.
- Does John Brennan accept Medicare?
- John Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Brennan's NPI active?
- Yes — John Brennan's NPI (1336123173) is active in the NPPES registry as of the last update on 2025-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.