Doctor profile · Federal record
Dr. John Gilbert, M.D.
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Internal Medicine Physician · Fullerton, CA
- NPI 1588650667
- Accepts Medicare
- 43 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
100 E Valencia Mesa Dr, Suite 105
Fullerton, CA 92835
(714) 446-5640
fax (714) 446-5625 - Mailing address
-
100 E Valencia Mesa Dr Ste 105
Fullerton, CA 928353816
Credentials & registration
- NPI registered
- September 2005 — 21 yrs on file
- Profile last updated
- October 19, 2020
- Year of graduation
- 1983 — 43 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- California #G53352
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588650667. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,772
Distinct HCPCS
10
Medicare allowed
$189,712
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J0897 |
Injection, denosumab, 1 mg | 1,080 | 14 | $23 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 943 | 525 | $139 | |
36415 |
Insertion of needle into vein for collection of blood sample | 315 | 180 | $8 | |
96372 |
Injection of drug or substance under skin or into muscle | 97 | 21 | $16 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 91 | 49 | $36 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 54 | 51 | $98 | |
99443 |
Telephone medical discussion with physician, 21-30 minutes | 47 | 38 | $139 | |
76536 |
Ultrasound scan of head and neck soft tissue | 41 | 38 | $119 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 34 | 14 | $83 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 30 | 12 | $52 |
In context: peer comparison
Among 3 peers in Fullerton Endocrinology, Diabetes & Metabolism Physician, average services per provider: 152. This provider delivers 18× the peer median.Open Payments
Industry payments received
All-time total
$38,683
Transactions
110
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 29 | $22,141.78 | |
| Novo Nordisk INC | 23 | $14,812.49 | |
| Lilly USA, LLC | 19 | $492.13 | |
| Dexcom, INC. | 8 | $325.68 | |
| Medtronic, INC. | 2 | $162.40 | |
| Amgen INC. | 5 | $121.32 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 3 | $77.70 | |
| Recordati_Rare_Diseases_INC. | 3 | $71.89 | |
| Radius Health, INC. | 3 | $68.67 | |
| Corcept Therapeutics | 2 | $68.65 | |
| Abbvie INC. | 3 | $68.63 | |
| Insulet Corporation | 3 | $59.44 | |
| Bayer Healthcare Pharmaceuticals INC. | 3 | $57.04 | |
| Novartis Pharmaceuticals Corporation | 2 | $50.19 | |
| Sanofi-Aventis U.S. LLC | 2 | $40.25 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
6,071
Patients
1,723
Total drug cost
$1,948,754
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 1,050 | 287 | $23,300 |
| Metformin Hcl ER (Metformin Hcl) | Brand | 605 | 185 | $11,532 |
| Atorvastatin Calcium | Generic | 562 | 173 | $9,629 |
| Ozempic (Semaglutide) | Brand | 446 | 97 | $658,570 |
| Farxiga (Dapagliflozin Propanediol) | Brand | 419 | 105 | $463,632 |
| Metformin Hcl | Generic | 399 | 124 | $5,515 |
| Pioglitazone Hcl | Generic | 366 | 111 | $9,378 |
| Synthroid (Levothyroxine Sodium) | Brand | 358 | 101 | $39,638 |
| Rosuvastatin Calcium | Generic | 347 | 106 | $15,380 |
| Amlodipine Besylate | Generic | 297 | 90 | $3,013 |
Frequently asked questions
What is Dr. John Gilbert's medical specialty?
Dr. John Gilbert practices Endocrinology, Diabetes & Metabolism Physician in Fullerton, CA.
Where does Dr. John Gilbert practice?
Dr. John Gilbert practices at 100 E Valencia Mesa Dr, Fullerton, CA 92835. Office phone: 7144465640.
What is Dr. John Gilbert's NPI?
Dr. John Gilbert's National Provider Identifier (NPI) is 1588650667, issued by NPPES.
Does Dr. John Gilbert accept Medicare assignment?
Yes. Dr. John Gilbert accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Gilbert commonly perform?
Top Medicare-reported procedures in 2023: Injection, denosumab, 1 mg (HCPCS J0897); Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415). Source: CMS Medicare Physician & Other Practitioners file.