Dennis Jack, FNP
NPI 1659858827 · Family Nurse Practitioner · Buffalo, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Jack, FNP is a Family Nurse Practitioner provider in Buffalo, NY (NPI 1659858827).
Provider details
- NPI number
- 1659858827
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 343352 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
343 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 327 | $78 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 16 | $104 |
Typical Medicare-allowed amounts for these services range $78–$104 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 295 | 96 |
| Furosemide | 153 | 45 |
| Hydralazine Hcl | 99 | 32 |
| Carvedilol | 78 | 30 |
| Calcitriol | 77 | 29 |
| Metoprolol Tartrate | 68 | 23 |
| Allopurinol | 65 | 17 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim |
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-07-20
- Last updated
- 2021-05-10
- Certified
- 2021-05-10
Frequently asked questions
- What is Dennis Jack's NPI number?
- Dennis Jack's National Provider Identifier (NPI) is 1659858827, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Jack's specialty?
- Dennis Jack is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Dennis Jack located?
- Dennis Jack's practice location on file with NPPES is 462 Grider St, Buffalo, NY 14215-3021.
- What is Dennis Jack's phone number?
- The practice phone number listed in the NPPES registry for Dennis Jack is (716) 609-0312.
- Does Dennis Jack accept Medicare?
- Dennis Jack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Jack's NPI active?
- Yes — Dennis Jack's NPI (1659858827) is active in the NPPES registry as of the last update on 2021-05-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.