David Yassa, M.D
NPI 1013951656 · Infectious Disease Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Yassa, M.D is a Infectious Disease Physician provider in Boston, MA (NPI 1013951656).
Provider details
- NPI number
- 1013951656
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 227352 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
505 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 234 | $82 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 105 | $181 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 58 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $69 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 22 | $124 |
| Detection Test By Nucleic Acid for Hiv-1 Virus, Quantification |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 161 | 21 |
| Dolutegravir Sodiumbrand: Tivicay | 66 | 11 |
| Elviteg/Cob/Emtri/Tenof Alafenbrand: Genvoya | 48 | — |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 24 | — |
| Cefadroxil | 19 | — |
| Emtricitab/Rilpiviri/Tenof Alabrand: Odefsey | 19 | — |
| Dolutegravir Sodium/Lamivudine |
Practice location
Mailing address
Additional practice locations (1)
- 45 Dimock StRoxbury, MA 02119-1208Phone: (617) 442-8800Fax: (617) 442-4088
Registry dates
- Enumerated
- 2006-06-15
- Last updated
- 2020-03-18
- Certified
- 2020-03-18
Frequently asked questions
- What is David Yassa's NPI number?
- David Yassa's National Provider Identifier (NPI) is 1013951656, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Yassa's specialty?
- David Yassa is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is David Yassa located?
- David Yassa's practice location on file with NPPES is 110 Francis St, Boston, MA 02215-5501.
- What is David Yassa's phone number?
- The practice phone number listed in the NPPES registry for David Yassa is (617) 632-7706.
- Does David Yassa accept Medicare?
- David Yassa is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Yassa's NPI active?
- Yes — David Yassa's NPI (1013951656) is active in the NPPES registry as of the last update on 2020-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.