Tony Ohn, M.D.
NPI 1184676850 · Emergency Medicine Physician · Merced, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tony Ohn, M.D. is a Emergency Medicine Physician provider in Merced, CA (NPI 1184676850).
Provider details
- NPI number
- 1184676850
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036089609 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
750 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 288 | $173 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 259 | $119 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 92 | $8 |
| Critical Care, First 30-74 Minutes99291 | 61 | $212 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 35 | $71 |
| Emergency Department Visit With Straightforward Medical Decision Making99282 | 15 | $42 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 30 | 29 |
| Prednisone | 21 | 19 |
| Doxycycline Hyclate | 15 | 15 |
| Ciprofloxacin Hcl | 14 | 14 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 11 | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 100 E Le Fevre RdSterling, IL 61081-1278Phone: (815) 625-0400Fax: (815) 625-2747
Registry dates
- Enumerated
- 2006-05-17
- Last updated
- 2022-08-14
- Certified
- 2022-08-14
Frequently asked questions
- What is Tony Ohn's NPI number?
- Tony Ohn's National Provider Identifier (NPI) is 1184676850, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tony Ohn's specialty?
- Tony Ohn is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tony Ohn located?
- Tony Ohn's practice location on file with NPPES is 2352 Tuscany Ave, Merced, CA 95340-9685.
- What is Tony Ohn's phone number?
- The practice phone number listed in the NPPES registry for Tony Ohn is (530) 407-3919.
- Does Tony Ohn accept Medicare?
- Tony Ohn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tony Ohn's NPI active?
- Yes — Tony Ohn's NPI (1184676850) is active in the NPPES registry as of the last update on 2022-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.