Gary Greenstein, DDS MS
NPI 1992835029 · Periodontics · Freehold, NJ
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Greenstein, DDS MS is a Periodontics provider in Freehold, NJ (NPI 1992835029).
Provider details
- NPI number
- 1992835029
- Entity type
- Individual
- Primary specialty
- PeriodonticsDental Providers
- Credential
- DDS MS
- Sex
- Male
- Sole proprietor
- No
- License
- 11138 (NJ)
Specialties & taxonomies
Dental Providers
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 |
|---|---|---|
| Chlorhexidine Gluconate | 66 | 58 |
| Amoxicillin | 51 | 42 |
| Doxycycline Hyclate | 26 | 24 |
| Metronidazole | 17 | 17 |
| Azithromycin | 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 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
- 2007-03-07
- Last updated
- 2007-07-08
Frequently asked questions
- What is Gary Greenstein's NPI number?
- Gary Greenstein's National Provider Identifier (NPI) is 1992835029, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Greenstein's specialty?
- Gary Greenstein is listed in the NPPES registry with a primary specialty of Periodontics (Dental Providers).
- Where is Gary Greenstein located?
- Gary Greenstein's practice location on file with NPPES is 900 West Main St, Freehold, NJ 07728.
- What is Gary Greenstein's phone number?
- The practice phone number listed in the NPPES registry for Gary Greenstein is (732) 780-1450.
- Does Gary Greenstein accept Medicare?
- Gary Greenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Greenstein's NPI active?
- Yes — Gary Greenstein's NPI (1992835029) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.