Mary Ellen Williams, D.O.
NPI 1093855793 · Family Medicine Physician · Whitehall, PA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Ellen Williams, D.O. is a Family Medicine Physician provider in Whitehall, PA (NPI 1093855793).
Provider details
- NPI number
- 1093855793
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- OS008484L (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
430 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 120 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 104 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 72 | $123 |
| 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 | 44 | $16 |
| Administration of Influenza Virus VaccineG0008 | 31 | $31 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 173 | 78 |
| Levothyroxine Sodium | 168 | 63 |
| Amlodipine Besylate | 158 | 68 |
| Atorvastatin Calcium | 95 | 41 |
| Alprazolam | 92 | 24 |
| Metformin Hcl | 77 | 32 |
| Simvastatin | 74 |
Practice location
Mailing address
Additional practice locations (1)
- 1003 Chestnut StEmmaus, PA 18049-1902Phone: (610) 625-2010Fax: (610) 625-2314
Registry dates
- Enumerated
- 2007-02-08
- Last updated
- 2023-07-19
- Certified
- 2023-07-19
Frequently asked questions
- What is Mary Ellen Williams's NPI number?
- Mary Ellen Williams's National Provider Identifier (NPI) is 1093855793, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ellen Williams's specialty?
- Mary Ellen Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Ellen Williams located?
- Mary Ellen Williams's practice location on file with NPPES is 3691 Crescent Ct E Ste 201, Whitehall, PA 18052-3433.
- What is Mary Ellen Williams's phone number?
- The practice phone number listed in the NPPES registry for Mary Ellen Williams is (610) 434-9561.
- Does Mary Ellen Williams accept Medicare?
- Mary Ellen Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Ellen Williams's NPI active?
- Yes — Mary Ellen Williams's NPI (1093855793) is active in the NPPES registry as of the last update on 2023-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.