Doctor profile · Federal record
Dr. Mark Gardenswartz, M.D.
Nephrology Physician (CMS: Nephrology) · New York, NY
- NPI 1326063215
- Accepts Medicare
- MIPS 85.0 / 100 · 2023
- 51 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
110 E 59Th St
New York, NY 100221304
(212) 583-2930
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- September 16, 2007
- Year of graduation
- 1975 — 51 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- New York #128389
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326063215. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,676
Distinct HCPCS
10
Medicare allowed
$242,644
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,011 | 304 | $146 | |
36415 |
Insertion of needle into vein for collection of blood sample | 913 | 321 | $8 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 333 | 105 | $134 | |
93000 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 114 | 107 | $17 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 71 | 71 | $252 | |
G0008 |
Administration of influenza virus vaccine | 59 | 59 | $35 | |
90662 |
Influenza vaccine split virus, preservative free | 52 | 52 | $72 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 48 | 42 | $103 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 38 | 32 | $145 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 37 | 36 | $195 |
In context: peer comparison
Among 96 peers in New York Nephrology Physician, average services per provider: 144. This provider delivers 19× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,444
Patients
448
Total drug cost
$35,645
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 206 | 65 | $2,591 |
| Atorvastatin Calcium | Generic | 170 | 52 | $2,494 |
| Metoprolol Succinate | Generic | 144 | 50 | $4,222 |
| Levothyroxine Sodium | Generic | 134 | 33 | $2,325 |
| Furosemide | Generic | 104 | 37 | $753 |
| Losartan Potassium | Generic | 98 | 36 | $2,546 |
| Hydrochlorothiazide | Generic | 80 | 33 | $513 |
| Rosuvastatin Calcium | Generic | 76 | 29 | $1,237 |
| Nifedipine ER (Nifedipine) | Brand | 73 | 14 | $3,342 |
| Potassium Chloride | Generic | 68 | 15 | $7,686 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Gardenswartz's medical specialty?
Dr. Mark Gardenswartz practices Nephrology Physician in New York, NY.
Where does Dr. Mark Gardenswartz practice?
Dr. Mark Gardenswartz practices at 110 E 59Th St, New York, NY 100221304. Office phone: 2125832930.
What is Dr. Mark Gardenswartz's NPI?
Dr. Mark Gardenswartz's National Provider Identifier (NPI) is 1326063215, issued by NPPES.
Does Dr. Mark Gardenswartz accept Medicare assignment?
Yes. Dr. Mark Gardenswartz accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Gardenswartz commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.