Jonathan Eisen, M.D.
NPI 1396126686 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Eisen, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1396126686).
Provider details
- NPI number
- 1396126686
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 263228 (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
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
255 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 | 178 | $82 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 44 | $134 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 33 | $120 |
Typical Medicare-allowed amounts for these services range $82–$134 (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.
Practice location
Mailing address
Additional practice locations (2)
- 75 Francis StBoston, MA 02115-6110Phone: (617) 732-5500
- 1153 Centre StJamaica Plain, MA 02130-3446Phone: (617) 983-7000
Registry dates
- Enumerated
- 2015-06-12
- Last updated
- 2026-01-15
- Certified
- 2026-01-15
Frequently asked questions
- What is Jonathan Eisen's NPI number?
- Jonathan Eisen's National Provider Identifier (NPI) is 1396126686, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Eisen's specialty?
- Jonathan Eisen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Eisen located?
- Jonathan Eisen's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Jonathan Eisen's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Eisen is (617) 636-5000.
- Does Jonathan Eisen accept Medicare?
- Jonathan Eisen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Eisen's NPI active?
- Yes — Jonathan Eisen's NPI (1396126686) is active in the NPPES registry as of the last update on 2026-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.