Doctor profile · Federal record
Dr. Gregory Krastein, MD
Nephrology Physician (CMS: Internal Medicine) · Oxnard, CA
- NPI 1942358759
- Accepts Medicare
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
2103 E Gonzales RD
Oxnard, CA 930363757
(805) 822-4595 - Additional location
-
19836 Ventura Blvd Suite C
Woodland Hills, CA 91364 - Mailing address
-
317 W Ventura Blvd # 1050
Camarillo, CA 930109134
Credentials & registration
- NPI registered
- January 2007 — 19 yrs on file
- Profile last updated
- February 21, 2023
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- California #G70211
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942358759. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
104
Distinct HCPCS
3
Medicare allowed
$11,626
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 53 | 29 | $104 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 34 | 34 | $138 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 17 | 11 | $82 |
In context: peer comparison
Among 4 peers in this city , average services per provider: 208. This provider delivers 0.5× the peer median.Open Payments
Industry payments received
All-time total
$186
Transactions
4
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Pharmaceuticals, Inc | 1 | $124.37 | |
| Novo Nordisk Inc | 3 | $61.16 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,009
Patients
355
Total drug cost
$90,202
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Calcitriol | Generic | 208 | 79 | $5,723 |
| Lisinopril | Generic | 149 | 57 | $2,196 |
| Amlodipine Besylate | Generic | 120 | 46 | $1,613 |
| Jardiance (Empagliflozin) | Brand | 88 | 26 | $35,328 |
| Losartan Potassium | Generic | 84 | 33 | $1,271 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 60 | 19 | $443 |
| Sevelamer Carbonate | Generic | 54 | 21 | $11,624 |
| Furosemide | Generic | 40 | 17 | $617 |
| Potassium Chloride | Generic | 40 | 18 | $2,401 |
| Spironolactone | Generic | 39 | 16 | $503 |
Frequently asked questions
What is Dr. Gregory Krastein's medical specialty?
Dr. Gregory Krastein practices Nephrology Physician in Oxnard, CA.
Where does Dr. Gregory Krastein practice?
Dr. Gregory Krastein practices at 2103 E Gonzales RD, Oxnard, CA 930363757. Office phone: 8058224595.
What is Dr. Gregory Krastein's NPI?
Dr. Gregory Krastein's National Provider Identifier (NPI) is 1942358759, issued by NPPES.
Does Dr. Gregory Krastein accept Medicare assignment?
Yes. Dr. Gregory Krastein accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Krastein commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.