Joseph Ahn, M.D.
NPI 1477812733 · Psychiatry Physician · Boston, MA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1477812733
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
14 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
476 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 160 | $195 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 159 | $102 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 112 | $140 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 31 | $176 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 14 | $136 |
Typical Medicare-allowed amounts for these services range $102–$195 (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 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 135 | 24 |
| Lorazepam | 114 | 25 |
| Bupropion Hclbrand: Bupropion Xl | 108 | 30 |
| Sertraline Hcl | 80 | 20 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 73 | 20 |
| Trazodone Hcl | 73 | 25 |
Practice location
Mailing address
Additional practice locations (1)
- One Medical Center DriveDhmc Department of PsychiatryLebanon, NH 03756-1000Phone: (603) 650-5000
Registry dates
- Enumerated
- 2012-05-08
- Last updated
- 2025-03-18
- Certified
- 2025-03-18
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.