Doctor profile · Federal record
Dr. John Gelzhiser, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Warwick, RI
- NPI 1013100759
- Accepts Medicare
- 22 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
455 Toll Gate RD
Warwick, RI 028862759
(401) 737-7000
fax (401) 736-4265
Credentials & registration
- NPI registered
- August 2007 — 19 yrs on file
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Rhode Island #PENDING
- Medicaid
- RI #PENDING
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1013100759. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
915
Distinct HCPCS
7
Medicare allowed
$119,605
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 285 | 118 | $108 | |
99305 |
Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes | 156 | 136 | $135 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 149 | 128 | $183 | |
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 110 | 59 | $108 | |
99305 |
Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes | 80 | 70 | $135 | |
99306 |
Initial nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 72 | 66 | $184 | |
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 63 | 47 | $75 |
In context: peer comparison
Among 21 peers in this city , average services per provider: 82. This provider delivers 11× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
7,565
Patients
1,833
Total drug cost
$225,792
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 943 | 172 | $9,853 |
| Atorvastatin Calcium | Generic | 800 | 269 | $11,151 |
| Furosemide | Generic | 797 | 169 | $5,708 |
| Trazodone Hcl | Generic | 603 | 145 | $8,097 |
| Eliquis (Apixaban) | Brand | 573 | 123 | $138,069 |
| Sertraline Hcl | Generic | 496 | 88 | $6,065 |
| Amlodipine Besylate | Generic | 443 | 142 | $4,859 |
| Escitalopram Oxalate | Generic | 422 | 75 | $6,362 |
| Metoprolol Succinate | Generic | 398 | 139 | $6,457 |
| Lisinopril | Generic | 388 | 111 | $4,216 |
Frequently asked questions
What is Dr. John Gelzhiser's medical specialty?
Dr. John Gelzhiser practices Internal Medicine Physician in Warwick, RI.
Where does Dr. John Gelzhiser practice?
Dr. John Gelzhiser practices at 455 Toll Gate RD, Warwick, RI 028862759. Office phone: 4017377000.
What is Dr. John Gelzhiser's NPI?
Dr. John Gelzhiser's National Provider Identifier (NPI) is 1013100759, issued by NPPES.
Does Dr. John Gelzhiser accept Medicare assignment?
Yes. Dr. John Gelzhiser accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Gelzhiser commonly perform?
Top Medicare-reported procedures in 2023: Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Initial nursing facility care with moderate level of medical decision making (HCPCS 99305); Initial nursing facility care with high level of medical decision making (HCPCS 99306). Source: CMS Medicare Physician & Other Practitioners file.