Doctor profile · Federal record
Dr. John Mesmer, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Oak Ridge, TN
- NPI 1518914951
- Accepts Medicare
- MIPS 81.5 / 100 · 2023
- 38 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
990 Oak Ridge Tpke
Oak Ridge, TN 378306976
(865) 481-1000 - Mailing address
-
Po Box 634706
Cincinnati, OH 452630001
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- November 29, 2007
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Tennessee #020154
- Medicaid
- TN #3068883
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1518914951. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
663
Distinct HCPCS
5
Medicare allowed
$94,957
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 352 | 340 | $164 | |
99284 |
Emergency department visit with moderate level of medical decision making | 214 | 209 | $113 | |
99291 |
Critical care, first 30-74 minutes | 52 | 51 | $199 | |
99283 |
Emergency department visit with low level of medical decision making | 34 | 34 | $67 | |
99282 |
Emergency department visit with straightforward medical decision making | 11 | 11 | $39 |
In context: peer comparison
Among 3 peers in Oak Ridge Emergency Medicine Physician, average services per provider: 129. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
383
Patients
373
Total drug cost
$2,031
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 60 | 59 | $202 |
| Cephalexin | Generic | 52 | 52 | $403 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 52 | 51 | $280 |
| Ondansetron Odt (Ondansetron) | Brand | 47 | 46 | $245 |
| Prednisone | Generic | 41 | 38 | $153 |
| Tramadol Hcl | Generic | 29 | 28 | $49 |
| Tamsulosin Hcl | Generic | 18 | 18 | $69 |
| Ciprofloxacin Hcl | Generic | 17 | 16 | $68 |
| Cyclobenzaprine Hcl | Generic | 16 | 15 | $53 |
| Metronidazole | Generic | 16 | 16 | $165 |
Hospital affiliations
Frequently asked questions
What is Dr. John Mesmer's medical specialty?
Dr. John Mesmer practices Emergency Medicine Physician in Oak Ridge, TN.
Where does Dr. John Mesmer practice?
Dr. John Mesmer practices at 990 Oak Ridge Tpke, Oak Ridge, TN 378306976. Office phone: 8654811000.
What is Dr. John Mesmer's NPI?
Dr. John Mesmer's National Provider Identifier (NPI) is 1518914951, issued by NPPES.
Does Dr. John Mesmer accept Medicare assignment?
Yes. Dr. John Mesmer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Mesmer commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.