John Oh, M.D.
NPI 1821141789 · Trauma Surgery Physician · Hershey, PA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Oh, M.D. is a Trauma Surgery Physician provider in Hershey, PA (NPI 1821141789).
Provider details
- NPI number
- 1821141789
- Entity type
- Individual
- Primary specialty
- Trauma Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD454424 (PA)
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
80 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 51 | $74 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 15 | $47 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 14 | $118 |
Typical Medicare-allowed amounts for these services range $47–$118 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-22
- Last updated
- 2016-01-06
Frequently asked questions
- What is John Oh's NPI number?
- John Oh's National Provider Identifier (NPI) is 1821141789, 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 Trauma Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Oh located?
- John Oh's practice location on file with NPPES is 500 University Dr, Hershey, PA 17033-2360.
- What is John Oh's phone number?
- The practice phone number listed in the NPPES registry for John Oh is (800) 243-1455.
- 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 (1821141789) is active in the NPPES registry as of the last update on 2016-01-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.