Nathan Wass, M.D.
NPI 1790135606 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Wass, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1790135606).
Provider details
- NPI number
- 1790135606
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 279022 (MA)
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
10 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
1,223 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 | 385 | $137 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 309 | $9 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 196 | $194 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 132 | $141 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 89 | $99 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 63 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 304 | 111 |
| Lisinopril | 161 | 61 |
| Amlodipine Besylate | 127 | 42 |
| Metoprolol Succinate | 113 | 41 |
| Levothyroxine Sodium | 100 | 31 |
| Omeprazole | 90 | 30 |
| Losartan Potassium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-21
- Last updated
- 2023-08-22
- Certified
- 2023-08-22
Frequently asked questions
- What is Nathan Wass's NPI number?
- Nathan Wass's National Provider Identifier (NPI) is 1790135606, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Wass's specialty?
- Nathan Wass is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Wass located?
- Nathan Wass's practice location on file with NPPES is 50 Staniford St Fl 9, Boston, MA 02114-2506.
- What is Nathan Wass's phone number?
- The practice phone number listed in the NPPES registry for Nathan Wass is (617) 724-6610.
- Does Nathan Wass accept Medicare?
- Nathan Wass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Wass's NPI active?
- Yes — Nathan Wass's NPI (1790135606) is active in the NPPES registry as of the last update on 2023-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.