John Oh, M.D.
NPI 1992730725 · Internal Medicine Physician · Niles, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Oh, M.D. is a Internal Medicine Physician provider in Niles, IL (NPI 1992730725).
Provider details
- NPI number
- 1992730725
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036064092 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,797 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 780 | $132 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 739 | $9 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 259 | $19 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 255 | $133 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 253 | $19 |
| Advance Care Planning, First 30 Minutes99497 | 246 | $84 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 108 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 1,103 | 307 |
| Amlodipine Besylate | 997 | 289 |
| Losartan Potassium | 794 | 247 |
| Rosuvastatin Calcium | 726 | 227 |
| Metformin Hcl | 586 | 167 |
| Tamsulosin Hcl | 453 | 137 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$25 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2023-07-16
- Certified
- 2023-07-16
Frequently asked questions
- What is John Oh's NPI number?
- John Oh's National Provider Identifier (NPI) is 1992730725, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Oh's specialty?
- John Oh is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Oh located?
- John Oh's practice location on file with NPPES is 241 Golf Mill Ctr, Niles, IL 60714-1224.
- What is John Oh's phone number?
- The practice phone number listed in the NPPES registry for John Oh is (847) 375-8282.
- Does John Oh accept Medicare?
- John Oh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Oh's NPI active?
- Yes — John Oh's NPI (1992730725) is active in the NPPES registry as of the last update on 2023-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.