Mark Gardenswartz, M.D.
NPI 1326063215 · Nephrology Physician · New York, NY
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Gardenswartz, M.D. is a Nephrology Physician provider in New York, NY (NPI 1326063215).
Provider details
- NPI number
- 1326063215
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 128389 (NY)
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
19 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
3,658 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 997 | $18 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 901 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 879 | $145 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 356 | $131 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 120 | $205 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 86 | 38 |
| Metoprolol Succinate | 72 | 30 |
| Furosemide | 71 | 31 |
| Losartan Potassium | 65 | 28 |
| Atorvastatin Calcium | 52 | 34 |
| Levothyroxine Sodium | 50 | 18 |
| Telmisartan | 43 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-13
- Last updated
- 2007-09-16
Frequently asked questions
- What is Mark Gardenswartz's NPI number?
- Mark Gardenswartz's National Provider Identifier (NPI) is 1326063215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Gardenswartz's specialty?
- Mark Gardenswartz is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Gardenswartz located?
- Mark Gardenswartz's practice location on file with NPPES is 110 E 59th St, New York, NY 10022-1304.
- What is Mark Gardenswartz's phone number?
- The practice phone number listed in the NPPES registry for Mark Gardenswartz is (212) 583-2930.
- Does Mark Gardenswartz accept Medicare?
- Mark Gardenswartz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Gardenswartz's NPI active?
- Yes — Mark Gardenswartz's NPI (1326063215) is active in the NPPES registry as of the last update on 2007-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.