Doctor profile · Federal record
Dr. Nick Karahalios, MD
Internal Medicine Physician (CMS: Internal Medicine) · San Clemente, CA
- NPI 1255442505
- Accepts Medicare
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
665 Camino de Los Mares Ste 309
San Clemente, CA 926732841
(949) 487-9034
fax (949) 493-3721
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- May 27, 2021
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G77834
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1255442505. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,537
Distinct HCPCS
10
Medicare allowed
$134,959
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 640 | 92 | $139 | |
36415 |
Insertion of needle into vein for collection of blood sample | 308 | 87 | $8 | |
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 93 | 48 | $26 | |
17000 |
Destruction of precancer skin growth, 1 growth | 78 | 34 | $76 | |
17003 |
Destruction of precancer skin growth, 2-14 growths | 64 | 23 | $8 | |
90662 |
Influenza vaccine split virus, preservative free | 64 | 64 | $72 | |
G0008 |
Administration of influenza virus vaccine | 64 | 64 | $33 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 61 | 32 | $98 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 45 | 11 | $125 | |
93306 |
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function | 27 | 25 | $157 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 95. This provider delivers 16× the peer median.Open Payments
Industry payments received
All-time total
$53
Transactions
3
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Pharmaceuticals, Inc | 3 | $52.95 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
744
Patients
149
Total drug cost
$50,501
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Zolpidem Tartrate | Generic | 81 | 11 | $553 |
| Rosuvastatin Calcium | Generic | 78 | 23 | $1,760 |
| Tamsulosin Hcl | Generic | 65 | 16 | $1,104 |
| Amlodipine Besylate | Generic | 57 | 14 | $420 |
| Azithromycin | Generic | 55 | 32 | $230 |
| Levothyroxine Sodium | Generic | 54 | 13 | $820 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 49 | 13 | $1,691 |
| Alprazolam | Generic | 48 | 0 | $546 |
| Pantoprazole Sodium | Generic | 48 | 13 | $352 |
| Prednisone | Generic | 48 | 14 | $91 |
Hospital affiliations
Frequently asked questions
What is Dr. Nick Karahalios's medical specialty?
Dr. Nick Karahalios practices Internal Medicine Physician in San Clemente, CA.
Where does Dr. Nick Karahalios practice?
Dr. Nick Karahalios practices at 665 Camino de Los Mares Ste 309, San Clemente, CA 926732841. Office phone: 9494879034.
What is Dr. Nick Karahalios's NPI?
Dr. Nick Karahalios's National Provider Identifier (NPI) is 1255442505, issued by NPPES.
Does Dr. Nick Karahalios accept Medicare assignment?
Yes. Dr. Nick Karahalios accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nick Karahalios 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); Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (HCPCS 99211). Source: CMS Medicare Physician & Other Practitioners file.