Niall Mehaffey, MD
NPI 1629771902 · Internal Medicine Physician · Jackson, MS
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Niall Mehaffey, MD is a Internal Medicine Physician provider in Jackson, MS (NPI 1629771902).
Provider details
- NPI number
- 1629771902
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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
3 yrs in NPPES registry
- Profile completeness38% of score
83% 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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 32 | 14 |
| Amlodipine Besylate | 31 | 12 |
| Levothyroxine Sodium | 17 | — |
| Rosuvastatin Calcium | 14 | — |
| Dapagliflozin Propanediolbrand: Farxiga | 13 | — |
| Losartan Potassium | 13 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-24
- Last updated
- 2023-07-09
- Certified
- 2023-07-09
Frequently asked questions
- What is Niall Mehaffey's NPI number?
- Niall Mehaffey's National Provider Identifier (NPI) is 1629771902, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Niall Mehaffey's specialty?
- Niall Mehaffey is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Niall Mehaffey located?
- Niall Mehaffey's practice location on file with NPPES is 2500 N State St, Jackson, MS 39216-4500.
- What is Niall Mehaffey's phone number?
- The practice phone number listed in the NPPES registry for Niall Mehaffey is (601) 984-1080.
- Does Niall Mehaffey accept Medicare?
- Niall Mehaffey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Niall Mehaffey's NPI active?
- Yes — Niall Mehaffey's NPI (1629771902) is active in the NPPES registry as of the last update on 2023-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.