William Gammon, MD
NPI 1164419941 · Family Medicine Physician · Myrtle Beach, SC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gammon, MD is a Family Medicine Physician provider in Myrtle Beach, SC (NPI 1164419941).
Provider details
- NPI number
- 1164419941
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 20322 (SC)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,421 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 | 1,102 | $109 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 573 | $16 |
| Screening 3d Breast Mammography77063 | 202 | $21 |
| Screening Mammography77067 | 200 | $82 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 164 | $121 |
| Injection of Drug Or Substance Under Skin Or Into Muscle |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 192 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 756 | 225 |
| Rosuvastatin Calcium | 723 | 227 |
| Levothyroxine Sodium | 487 | 132 |
| Amlodipine Besylate | 455 | 141 |
| Prednisone | 390 | 232 |
| Lisinopril | 359 | 111 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,235 across 72 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
Registry dates
- Enumerated
- 2005-10-05
- Last updated
- 2021-02-15
- Certified
- 2021-02-15
Frequently asked questions
- What is William Gammon's NPI number?
- William Gammon's National Provider Identifier (NPI) is 1164419941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gammon's specialty?
- William Gammon is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Gammon located?
- William Gammon's practice location on file with NPPES is 101 Mcleod Health Blvd Ste 201, Myrtle Beach, SC 29579-4477.
- What is William Gammon's phone number?
- The practice phone number listed in the NPPES registry for William Gammon is (843) 646-8001.
- Does William Gammon accept Medicare?
- William Gammon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gammon's NPI active?
- Yes — William Gammon's NPI (1164419941) is active in the NPPES registry as of the last update on 2021-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.