Quick answers
- Does Craig N. Hartenstein accept Medicare assignment?
- Yes. Medicare's clinician data says Craig N. Hartenstein accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Craig N. Hartenstein see?
- In 2024, CMS data shows 374 Original Medicare patients and 676 services for Craig N. Hartenstein. This counts Original Medicare only and measures volume, not quality.
- What is Craig N. Hartenstein's NPI number?
- 1437689825. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Craig N. Hartenstein, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 374 |
|---|---|
| Services billed to Medicare | 676 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient complete exam of visual system (92014)211 services
- Photography of the retina (92250)135 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)69 services
- Established patient problem focused exam of visual system (92012)67 services
- New patient complete exam of visual system (92004)39 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol70%
- High blood pressure65%
- Arthritis38%
- Diabetes23%
- Anxiety18%
- Ischemic heart disease17%
Practice locations
Addresses where Craig N. Hartenstein is enrolled with Medicare (CMS data updated October 2, 2026).
- 161 Main StPlaistow, NH 03865 (603) 382‑8989
- 760 Lafayette RdHampton, NH 03842 (603) 926‑5471
Group practices
Medicare enrollment lists Craig N. Hartenstein as a member of these groups (CMS data updated October 2, 2026).
- Hampton Eyecare Associates, PLLC4 clinicians in the group
- Ocean Family Eyecare, PLLC4 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Plaistow
Clinicians with the same Medicare primary specialty in Plaistow, NH — not a recommendation.
Other clinicians in Hampton Eyecare Associates, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | New England College Of Optometry |
| Graduation year | 2017 (9 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437689825 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians