Oren Gersten, MD
NPI 1295129393 · Family Medicine Physician · South Portland, ME
Oren Gersten, MD is a Family Medicine Physician provider in South Portland, ME (NPI 1295129393).
Provider details
- NPI number
- 1295129393
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lisinopril | 31 |
| Gabapentin | 28 |
| Atorvastatin Calcium | 24 |
| Losartan Potassium | 23 |
| Amlodipine Besylate | 19 |
| Levothyroxine Sodium | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 22 Bramhall StPortland, ME 04102-3134Phone: (207) 662-7060
Registry dates
- Enumerated
- 2015-03-26
- Last updated
- 2019-01-23
Frequently asked questions
- What is Oren Gersten's NPI number?
- Oren Gersten's National Provider Identifier (NPI) is 1295129393, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oren Gersten's specialty?
- Oren Gersten is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Oren Gersten located?
- Oren Gersten's practice location on file with NPPES is 27 Ocean St Ste 3, South Portland, ME 04106-2854.
- What is Oren Gersten's phone number?
- The practice phone number listed in the NPPES registry for Oren Gersten is (207) 618-9792.
- Is Oren Gersten's NPI active?
- Yes — Oren Gersten's NPI (1295129393) is active in the NPPES registry as of the last update on 2019-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.