Doctor profile · Federal record
Dr. Sergio Diaz, MD
Internal Medicine Physician (CMS: Internal Medicine) · Johnson City, TN
- NPI 1417138439
- Accepts Medicare
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
301 MED Tech Pkwy Ste 240
Johnson City, TN 376042641
(423) 794-5520
fax (423) 282-6940 - Additional location
-
444 Clinchfield St Ste 201
Kingsport, TN 376603863
(423) 230-2100
fax (423) 230-2112 - Mailing address
-
Po Box 632476
Cincinnati, OH 452632476
Credentials & registration
- NPI registered
- November 2007 — 19 yrs on file
- Profile last updated
- February 14, 2025
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Tennessee #43908
- Medicaid
- TN #1508669
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1417138439. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
925
Distinct HCPCS
6
Medicare allowed
$95,759
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 397 | 155 | $112 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 261 | 136 | $75 | |
99239 |
Hospital discharge day management, more than 30 minutes | 183 | 180 | $107 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 41 | 41 | $162 | |
99497 |
Advance care planning, first 30 minutes | 25 | 17 | $72 | |
99291 |
Critical care, first 30-74 minutes | 18 | 12 | $202 |
In context: peer comparison
Among 41 peers in Johnson City Internal Medicine Physician, average services per provider: 129. This provider delivers 7.2× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
378
Patients
319
Total drug cost
$13,784
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cefdinir | Generic | 80 | 73 | $1,184 |
| Ondansetron Odt (Ondansetron) | Brand | 51 | 50 | $432 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 39 | 38 | $180 |
| Naloxone Hcl | Generic | 36 | 35 | $3,060 |
| Prednisone | Generic | 34 | 32 | $113 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 22 | 21 | $192 |
| Oxycodone Hcl | Generic | 20 | 17 | $100 |
| Pantoprazole Sodium | Generic | 18 | 16 | $212 |
| Levofloxacin | Generic | 15 | 14 | $57 |
| Diltiazem 24Hr ER (Cd) (Diltiazem Hcl) | Brand | 13 | 0 | $344 |
Hospital affiliations
Frequently asked questions
What is Dr. Sergio Diaz's medical specialty?
Dr. Sergio Diaz practices Internal Medicine Physician in Johnson City, TN.
Where does Dr. Sergio Diaz practice?
Dr. Sergio Diaz practices at 301 MED Tech Pkwy Ste 240, Johnson City, TN 376042641. Office phone: 4237945520.
What is Dr. Sergio Diaz's NPI?
Dr. Sergio Diaz's National Provider Identifier (NPI) is 1417138439, issued by NPPES.
Does Dr. Sergio Diaz accept Medicare assignment?
Yes. Dr. Sergio Diaz accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Sergio Diaz commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.