Mario Flores, MD
NPI 1437103439 · Internal Medicine Physician · Southborough, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mario Flores, MD is a Internal Medicine Physician provider in Southborough, MA (NPI 1437103439).
Provider details
- NPI number
- 1437103439
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 151100 (MA)
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
20 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
1,185 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 | 351 | $129 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 242 | $9 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 179 | $130 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 82 | $131 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 79 | $19 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 63 | $19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 80 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 283 | 87 |
| Levothyroxine Sodium | 124 | 40 |
| Losartan Potassium | 123 | 47 |
| Amlodipine Besylate | 109 | 42 |
| Lisinopril | 108 | 43 |
| Rosuvastatin Calcium | 102 | 41 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$87 across 4 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
- 2006-05-22
- Last updated
- 2014-02-04
Frequently asked questions
- What is Mario Flores's NPI number?
- Mario Flores's National Provider Identifier (NPI) is 1437103439, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mario Flores's specialty?
- Mario Flores is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mario Flores located?
- Mario Flores's practice location on file with NPPES is 24 Newton St, Southborough, MA 01772-1215.
- What is Mario Flores's phone number?
- The practice phone number listed in the NPPES registry for Mario Flores is (508) 481-5500.
- Does Mario Flores accept Medicare?
- Mario Flores is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mario Flores's NPI active?
- Yes — Mario Flores's NPI (1437103439) is active in the NPPES registry as of the last update on 2014-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.