Gregory Martinez, M.D.
NPI 1982863098 · Nephrology Physician · Fresno, CA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Martinez, M.D. is a Nephrology Physician provider in Fresno, CA (NPI 1982863098).
Provider details
- NPI number
- 1982863098
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A103241 (CA)
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
18 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
7,317 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 | 804 | $78 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 692 | $99 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 592 | $9 |
| Phosphate Level84100 | 481 | $5 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 465 | $10 |
| Magnesium Level83735 | 462 | $7 |
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 |
|---|---|---|
| Furosemide | 203 | 80 |
| Allopurinol | 201 | 78 |
| Amlodipine Besylate | 144 | 59 |
| Hydralazine Hcl | 130 | 51 |
| Losartan Potassium | 127 | 54 |
| Dapagliflozin Propanediolbrand: Farxiga | 103 | 37 |
| Parenteral Amino Acid 20% No.1brand: Prosol | 101 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,266 across 62 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
- 2008-06-04
- Last updated
- 2017-08-15
Frequently asked questions
- What is Gregory Martinez's NPI number?
- Gregory Martinez's National Provider Identifier (NPI) is 1982863098, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Martinez's specialty?
- Gregory Martinez is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Martinez located?
- Gregory Martinez's practice location on file with NPPES is 568 E Herndon Ave, Fresno, CA 93720-2989.
- What is Gregory Martinez's phone number?
- The practice phone number listed in the NPPES registry for Gregory Martinez is (559) 228-6600.
- Does Gregory Martinez accept Medicare?
- Gregory Martinez is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Martinez's NPI active?
- Yes — Gregory Martinez's NPI (1982863098) is active in the NPPES registry as of the last update on 2017-08-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.