Harry Dayton, M. D., PH. D.
NPI 1275695694 · Internal Medicine Physician · Meridian, MS
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Harry Dayton, M. D., PH. D. is a Internal Medicine Physician provider in Meridian, MS (NPI 1275695694).
Provider details
- NPI number
- 1275695694
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D., PH. D.
- Sex
- Male
- Sole proprietor
- No
- License
- 11617 (MS)
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 tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
293 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 257 | $92 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 22 | $127 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 14 | $63 |
Typical Medicare-allowed amounts for these services range $63–$127 (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 · 126 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 350 | 86 |
| Atorvastatin Calcium | 308 | 84 |
| Levothyroxine Sodium | 272 | 68 |
| Pantoprazole Sodium | 258 | 58 |
| Meloxicam | 256 | 71 |
| Potassium Chloride | 208 | 57 |
| Metformin Hcl | 204 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$138 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-14
- Last updated
- 2015-03-10
Frequently asked questions
- What is Harry Dayton's NPI number?
- Harry Dayton's National Provider Identifier (NPI) is 1275695694, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harry Dayton's specialty?
- Harry Dayton is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Harry Dayton located?
- Harry Dayton's practice location on file with NPPES is 905c S Frontage Rd, Meridian, MS 39301-6113.
- What is Harry Dayton's phone number?
- The practice phone number listed in the NPPES registry for Harry Dayton is (601) 486-4210.
- Does Harry Dayton accept Medicare?
- Harry Dayton is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Harry Dayton's NPI active?
- Yes — Harry Dayton's NPI (1275695694) is active in the NPPES registry as of the last update on 2015-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.