Phenton Harker, MD
NPI 1629148911 · Public Health & General Preventive Medicine Physician · Portsmouth, NH
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Phenton Harker, MD is a Public Health & General Preventive Medicine Physician provider in Portsmouth, NH (NPI 1629148911).
Provider details
- NPI number
- 1629148911
- Entity type
- Individual
- Primary specialty
- Public Health & General Preventive Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 13320 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
616 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) |
|---|---|---|
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 145 | $48 |
| 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 | 134 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 118 | $79 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 116 | $76 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 68 | $97 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 239 | 73 |
| Lisinopril | 171 | 48 |
| Amlodipine Besylate | 147 | 43 |
| Levothyroxine Sodium | 100 | 26 |
| Rosuvastatin Calcium | 96 | 27 |
| Tamsulosin Hcl | 77 | 22 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-08
- Last updated
- 2025-11-18
- Certified
- 2025-11-18
Frequently asked questions
- What is Phenton Harker's NPI number?
- Phenton Harker's National Provider Identifier (NPI) is 1629148911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Phenton Harker's specialty?
- Phenton Harker is listed in the NPPES registry with a primary specialty of Public Health & General Preventive Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Phenton Harker located?
- Phenton Harker's practice location on file with NPPES is 25 New Hampshire Ave, Portsmouth, NH 03801.
- What is Phenton Harker's phone number?
- The practice phone number listed in the NPPES registry for Phenton Harker is (603) 431-2516.
- Does Phenton Harker accept Medicare?
- Phenton Harker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Phenton Harker's NPI active?
- Yes — Phenton Harker's NPI (1629148911) is active in the NPPES registry as of the last update on 2025-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.