Mary Davies, MD
NPI 1831113620 · Internal Medicine Physician · Harrisburg, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Davies, MD is a Internal Medicine Physician provider in Harrisburg, PA (NPI 1831113620).
Provider details
- NPI number
- 1831113620
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD429252 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,648 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 | 593 | $121 |
| 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 | 317 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 262 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 141 | $123 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 106 | $18 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 153 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 452 | 125 |
| Amlodipine Besylate | 420 | 124 |
| Losartan Potassium | 333 | 92 |
| Levothyroxine Sodium | 289 | 84 |
| Lisinopril | 287 | 89 |
| Omeprazole | 246 | 74 |
| Hydrochlorothiazide |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2021-05-14
- Certified
- 2021-04-20
Frequently asked questions
- What is Mary Davies's NPI number?
- Mary Davies's National Provider Identifier (NPI) is 1831113620, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Davies's specialty?
- Mary Davies is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Davies located?
- Mary Davies's practice location on file with NPPES is 805 Sir Thomas Ct Fl 1, Harrisburg, PA 17109.
- What is Mary Davies's phone number?
- The practice phone number listed in the NPPES registry for Mary Davies is (717) 988-0020.
- Does Mary Davies accept Medicare?
- Mary Davies is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Davies's NPI active?
- Yes — Mary Davies's NPI (1831113620) is active in the NPPES registry as of the last update on 2021-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.