Gregory Willis, DO
NPI 1184605677 · Gynecologic Oncology Physician · York, PA
Enrolled with Medicare as Practitioner - Gynecological Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Willis, DO is a Gynecologic Oncology Physician provider in York, PA (NPI 1184605677).
Provider details
- NPI number
- 1184605677
- Entity type
- Individual
- Primary specialty
- Gynecologic Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- OS009400L (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
299 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 | 120 | $93 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $63 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 31 | $63 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 29 | $173 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $92 |
| 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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 33 | 31 |
| Prochlorperazine Maleate | 20 | 13 |
| Dexamethasone | 19 | 12 |
| Letrozole | 19 | — |
| Apixabanbrand: Eliquis | 18 | — |
| Estradiol | 12 | — |
| Ondansetron Hcl | 11 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$217 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 (1)
- 2035 Technology Pkwy Ste 201Mechanicsburg, PA 17050-9497Phone: (717) 221-5940Fax: (717) 233-1939
Registry dates
- Enumerated
- 2005-11-10
- Last updated
- 2021-01-23
- Certified
- 2021-01-23
Frequently asked questions
- What is Gregory Willis's NPI number?
- Gregory Willis's National Provider Identifier (NPI) is 1184605677, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Willis's specialty?
- Gregory Willis is listed in the NPPES registry with a primary specialty of Gynecologic Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Willis located?
- Gregory Willis's practice location on file with NPPES is 1703 Innovation Dr Ste 2001, York, PA 17408-8815.
- What is Gregory Willis's phone number?
- The practice phone number listed in the NPPES registry for Gregory Willis is (717) 801-0739.
- Does Gregory Willis accept Medicare?
- Gregory Willis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Willis's NPI active?
- Yes — Gregory Willis's NPI (1184605677) is active in the NPPES registry as of the last update on 2021-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.