Colby Shirk, M. D.
NPI 1912935271 · Emergency Medicine Physician · Chambersburg, PA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1912935271
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD427340 (PA)
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
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
540 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 349 | $167 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 146 | $115 |
| Critical Care, First 30-74 Minutes99291 | 45 | $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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Diclofenac Sodium | 77 | 77 |
| Cephalexin | 53 | 52 |
| Oxycodone Hcl | 44 | 44 |
| Ondansetronbrand: Ondansetron Odt | 32 | 32 |
| Prednisone | 21 | 21 |
| Azithromycin | 20 | 20 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 17 | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$42 across 2 records (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
Additional practice locations (3)
- 112 North 7th StreetChambersburg, PA 17201-1700Phone: (717) 267-7146Fax: (717) 267-7728
- 500 University DrH043Hershey, PA 17033-2360Phone: (717) 531-6039Fax: (717) 531-4587
- 501 E Main StWaynesboro, PA 17268-2353Phone: (717) 765-3400Fax: (717) 267-7728
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2020-02-13
- Certified
- 2020-02-13
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.