Doctor profile · Federal record
Dr. Ramesh Nathan, MD
Infectious Disease Physician (CMS: Infectious Disease) · Thousand Oaks, CA
- NPI 1215025291
- Accepts Medicare
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
375 Rolling Oaks Dr Ste 210
Thousand Oaks, CA 913611028
(805) 495-1073
fax (805) 495-5836
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- August 18, 2025
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207RI0200X — NUCC code
- State license (1)
- California #A77898
- Medicaid
- CA #OOA778980
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1215025291. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,914
Distinct HCPCS
10
Medicare allowed
$311,780
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 1,577 | 408 | $82 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 323 | 170 | $119 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 289 | 161 | $97 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 280 | 258 | $180 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 87 | 64 | $135 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 87 | 79 | $192 | |
96365 |
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 50 | 26 | $73 | |
99291 |
Critical care, first 30-74 minutes | 48 | 35 | $218 | |
G0427 |
Telehealth consultation, emergency department or initial inpatient, typically 70 minutes or more communicating with the patient via telehealth | 48 | 47 | $186 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 34 | 34 | $234 |
In context: peer comparison
Among 3 peers in Thousand Oaks Infectious Disease Physician, average services per provider: 231. This provider delivers 13× the peer median.Open Payments
Industry payments received
All-time total
$96
Transactions
4
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Insmed, INC. | 2 | $44.60 | |
| Cumberland Pharmaceuticals, INC. | 1 | $27.70 | |
| Abbvie INC. | 1 | $23.32 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
778
Patients
117
Total drug cost
$23,327
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 113 | 28 | $1,492 |
| Amlodipine Besylate | Generic | 72 | 15 | $687 |
| Alprazolam | Generic | 69 | 13 | $912 |
| Levothyroxine Sodium | Generic | 64 | 15 | $840 |
| Synthroid (Levothyroxine Sodium) | Brand | 50 | 0 | $2,825 |
| Losartan Potassium | Generic | 49 | 11 | $708 |
| Simvastatin | Generic | 46 | 0 | $526 |
| Lisinopril | Generic | 45 | 13 | $426 |
| Allopurinol | Generic | 42 | 0 | $651 |
| Ceftriaxone (Ceftriaxone Sodium) | Brand | 42 | 11 | $10,580 |
Hospital affiliations
Frequently asked questions
What is Dr. Ramesh Nathan's medical specialty?
Dr. Ramesh Nathan practices Infectious Disease Physician in Thousand Oaks, CA.
Where does Dr. Ramesh Nathan practice?
Dr. Ramesh Nathan practices at 375 Rolling Oaks Dr Ste 210, Thousand Oaks, CA 913611028. Office phone: 8054951073.
What is Dr. Ramesh Nathan's NPI?
Dr. Ramesh Nathan's National Provider Identifier (NPI) is 1215025291, issued by NPPES.
Does Dr. Ramesh Nathan accept Medicare assignment?
Yes. Dr. Ramesh Nathan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ramesh Nathan commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.