Martin Klein, MD
NPI 1235209560 · Family Medicine Physician · Flemington, NJ
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Martin Klein, MD is a Family Medicine Physician provider in Flemington, NJ (NPI 1235209560).
Provider details
- NPI number
- 1235209560
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 25MA07294900 (NJ)
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 tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ezetimibe | 25 | — |
| Rosuvastatin Calcium | 18 | — |
| Metformin Hcl | 15 | — |
| Omeprazole | 14 | — |
| Chlorhexidine Gluconate | 13 | 11 |
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 no Part D record, 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
Registry dates
- Enumerated
- 2006-11-08
- Last updated
- 2022-12-07
- Certified
- 2022-12-07
Frequently asked questions
- What is Martin Klein's NPI number?
- Martin Klein's National Provider Identifier (NPI) is 1235209560, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martin Klein's specialty?
- Martin Klein is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Martin Klein located?
- Martin Klein's practice location on file with NPPES is 4 Thames Ln, Flemington, NJ 08822-5791.
- What is Martin Klein's phone number?
- The practice phone number listed in the NPPES registry for Martin Klein is (908) 246-3227.
- Does Martin Klein accept Medicare?
- Martin Klein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Martin Klein's NPI active?
- Yes — Martin Klein's NPI (1235209560) is active in the NPPES registry as of the last update on 2022-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.