Thomas Oh, M.D.
NPI 1033275276 · Emergency Medicine Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Oh, M.D. is a Emergency Medicine Physician provider in Naperville, IL (NPI 1033275276).
Provider details
- NPI number
- 1033275276
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-106421 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
445 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 136 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 133 | $67 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 44 | $179 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 32 | $124 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 28 | $8 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 76 | 75 |
| Methylprednisolone | 73 | 72 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 58 | 58 |
| Ondansetronbrand: Ondansetron Odt | 39 | 39 |
| Prednisone | 36 | 36 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 32 | 31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-30
- Last updated
- 2025-12-01
- Certified
- 2025-12-01
Frequently asked questions
- What is Thomas Oh's NPI number?
- Thomas Oh's National Provider Identifier (NPI) is 1033275276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Oh's specialty?
- Thomas Oh is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Oh located?
- Thomas Oh's practice location on file with NPPES is 801 S Washington St, Naperville, IL 60540-7430.
- What is Thomas Oh's phone number?
- The practice phone number listed in the NPPES registry for Thomas Oh is (630) 527-3000.
- Does Thomas Oh accept Medicare?
- Thomas Oh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Oh's NPI active?
- Yes — Thomas Oh's NPI (1033275276) is active in the NPPES registry as of the last update on 2025-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.