Tammy Duong, M.D.
NPI 1265848519 · Psychiatry Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Duong, M.D. is a Psychiatry Physician provider in Los Angeles, CA (NPI 1265848519).
Provider details
- NPI number
- 1265848519
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A130609 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
442 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 288 | $109 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 66 | $69 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 50 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 25 | $109 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 13 | $186 |
Typical Medicare-allowed amounts for these services range $19–$186 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Mirtazapine | 113 | 23 |
| Lorazepam | 65 | 20 |
| Quetiapine Fumarate | 62 | 12 |
| Escitalopram Oxalate | 57 | 14 |
| Clonazepam | 51 | — |
| Duloxetine Hcl | 49 | — |
| Bupropion Hclbrand: Bupropion Xl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-07-08
- Last updated
- 2016-11-07
Frequently asked questions
- What is Tammy Duong's NPI number?
- Tammy Duong's National Provider Identifier (NPI) is 1265848519, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Duong's specialty?
- Tammy Duong is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Tammy Duong located?
- Tammy Duong's practice location on file with NPPES is 2010 Zonal Ave, Los Angeles, CA 90033-1026.
- What is Tammy Duong's phone number?
- The practice phone number listed in the NPPES registry for Tammy Duong is (323) 409-5572.
- Does Tammy Duong accept Medicare?
- Tammy Duong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Duong's NPI active?
- Yes — Tammy Duong's NPI (1265848519) is active in the NPPES registry as of the last update on 2016-11-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.