Jonathon Schwartz, MD
NPI 1689644932 · Nephrology Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathon Schwartz, MD is a Nephrology Physician provider in Cambridge, MA (NPI 1689644932).
Provider details
- NPI number
- 1689644932
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 160454 (MA)
Specialties & taxonomies
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
205 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 | 84 | $82 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 40 | $124 |
| Hemodialysis Procedure With Physician Evaluation90935 | 18 | $74 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 17 | $181 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 | 17 | $192 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 |
Practice location
Mailing address
Additional practice locations (1)
- 300 Mount Auburn St Ste 515Cambridge, MA 02138-5665Phone: (617) 864-1571Fax: (617) 864-1507
Registry dates
- Enumerated
- 2006-01-26
- Last updated
- 2024-11-18
- Certified
- 2024-11-18
Frequently asked questions
- What is Jonathon Schwartz's NPI number?
- Jonathon Schwartz's National Provider Identifier (NPI) is 1689644932, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathon Schwartz's specialty?
- Jonathon Schwartz is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathon Schwartz located?
- Jonathon Schwartz's practice location on file with NPPES is 1575 Cambridge St, Cambridge, MA 02138-4308.
- What is Jonathon Schwartz's phone number?
- The practice phone number listed in the NPPES registry for Jonathon Schwartz is (617) 876-4344.
- Does Jonathon Schwartz accept Medicare?
- Jonathon Schwartz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathon Schwartz's NPI active?
- Yes — Jonathon Schwartz's NPI (1689644932) is active in the NPPES registry as of the last update on 2024-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.