Doctor profile · Federal record
Dr. Phenton Harker, MD
Public Health & General Preventive Medicine Physician (CMS: Family Practice) · Family Medicine Physician · Portsmouth, NH
- NPI 1629148911
- Accepts Medicare
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
25 New Hampshire Ave, Suite 100
Portsmouth, NH 03801
(603) 431-2516
fax (603) 228-7307
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- November 18, 2025
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 2083P0901X — NUCC code
- State license (1)
- New Hampshire #13320
- Medicaid
- NH #30206388
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1629148911. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
483
Distinct HCPCS
6
Medicare allowed
$34,638
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 158 | 111 | $81 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 133 | 133 | $49 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 83 | 57 | $100 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 79 | 74 | $69 | |
G0008 |
Administration of influenza virus vaccine | 16 | 16 | $31 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 14 | 14 | $76 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 80. This provider delivers 6.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,371
Patients
382
Total drug cost
$22,346
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 217 | 64 | $3,940 |
| Lisinopril | Generic | 184 | 52 | $1,997 |
| Amlodipine Besylate | Generic | 126 | 42 | $1,665 |
| Levothyroxine Sodium | Generic | 112 | 33 | $1,256 |
| Omeprazole | Generic | 90 | 24 | $1,140 |
| Rosuvastatin Calcium | Generic | 76 | 25 | $2,658 |
| Losartan Potassium | Generic | 75 | 25 | $1,155 |
| Pantoprazole Sodium | Generic | 73 | 19 | $1,331 |
| Tamsulosin Hcl | Generic | 70 | 20 | $1,573 |
| Lorazepam | Generic | 64 | 14 | $449 |
Hospital affiliations
Frequently asked questions
What is Dr. Phenton Harker's medical specialty?
Dr. Phenton Harker practices Public Health & General Preventive Medicine Physician in Portsmouth, NH.
Where does Dr. Phenton Harker practice?
Dr. Phenton Harker practices at 25 New Hampshire Ave, Portsmouth, NH 03801. Office phone: 6034312516.
What is Dr. Phenton Harker's NPI?
Dr. Phenton Harker's National Provider Identifier (NPI) is 1629148911, issued by NPPES.
Does Dr. Phenton Harker accept Medicare assignment?
Yes. Dr. Phenton Harker accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Phenton Harker commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.