Matthew Day, M.D.
NPI 1619237328 · Nephrology Physician · Savannah, GA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Day, M.D. is a Nephrology Physician provider in Savannah, GA (NPI 1619237328).
Provider details
- NPI number
- 1619237328
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 84151 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 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
1,075 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 692 | $75 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 138 | $278 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 92 | $47 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 73 | $113 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 51 | $84 |
| Dialysis Services, 1 Physician Visit Per Month (20 Years Or Older)90962 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 123 | 37 |
| Calcitriol | 110 | 26 |
| Hydralazine Hcl | 108 | 29 |
| Furosemide | 86 | 27 |
| Carvedilol | 72 | 26 |
| Calcium Acetate | 58 | 26 |
| Lisinopril | 56 | 13 |
| Dapagliflozin Propanediol |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$367 across 17 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
- 2012-05-29
- Last updated
- 2020-02-26
- Certified
- 2020-02-26
Frequently asked questions
- What is Matthew Day's NPI number?
- Matthew Day's National Provider Identifier (NPI) is 1619237328, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Day's specialty?
- Matthew Day is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Day located?
- Matthew Day's practice location on file with NPPES is 500 E 66th St, Savannah, GA 31405-4339.
- What is Matthew Day's phone number?
- The practice phone number listed in the NPPES registry for Matthew Day is (912) 356-5643.
- Does Matthew Day accept Medicare?
- Matthew Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Day's NPI active?
- Yes — Matthew Day's NPI (1619237328) is active in the NPPES registry as of the last update on 2020-02-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.