Jack Ko, MD
NPI 1023143674 · Emergency Medicine Physician · York, PA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jack Ko, MD is a Emergency Medicine Physician provider in York, PA (NPI 1023143674).
Provider details
- NPI number
- 1023143674
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D0055885 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
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
422 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 | 321 | $167 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 72 | $115 |
| Critical Care, First 30-74 Minutes99291 | 29 | $202 |
Typical Medicare-allowed amounts for these services range $115–$202 (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
- 2007-02-23
- Last updated
- 2019-04-05
Frequently asked questions
- What is Jack Ko's NPI number?
- Jack Ko's National Provider Identifier (NPI) is 1023143674, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jack Ko's specialty?
- Jack Ko is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jack Ko located?
- Jack Ko's practice location on file with NPPES is 1001 S George St, York, PA 17403-3676.
- What is Jack Ko's phone number?
- The practice phone number listed in the NPPES registry for Jack Ko is (717) 851-2450.
- Does Jack Ko accept Medicare?
- Jack Ko is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jack Ko's NPI active?
- Yes — Jack Ko's NPI (1023143674) is active in the NPPES registry as of the last update on 2019-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.