Guillermo Obregon, MD
NPI 1033732227 · Family Medicine Physician · Brownsville, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Obregon, MD is a Family Medicine Physician provider in Brownsville, TX (NPI 1033732227).
Provider details
- NPI number
- 1033732227
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 24858 (NH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
6 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
503 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 50 Minutes99233 | 246 | $113 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 87 | $75 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 56 | $77 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 41 | $165 |
| Initial Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 35 Minutes99305 | 22 | $127 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 38 | 14 |
| Atorvastatin Calcium | 31 | 25 |
| Metoprolol Tartrate | 30 | 20 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 20 | 14 |
| Apixabanbrand: Eliquis | 20 | 15 |
| Carvedilol | 19 | 11 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$48 across 2 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
Additional practice locations (1)
- 311 Route 108Somersworth, NH 03878-1522Phone: (603) 749-2346
Registry dates
- Enumerated
- 2020-05-21
- Last updated
- 2024-11-20
- Certified
- 2024-11-20
Frequently asked questions
- What is Guillermo Obregon's NPI number?
- Guillermo Obregon's National Provider Identifier (NPI) is 1033732227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Obregon's specialty?
- Guillermo Obregon is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Obregon located?
- Guillermo Obregon's practice location on file with NPPES is 100 E Alton Gloor Blvd, Brownsville, TX 78526-3328.
- What is Guillermo Obregon's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Obregon is (956) 350-7000.
- Does Guillermo Obregon accept Medicare?
- Guillermo Obregon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Obregon's NPI active?
- Yes — Guillermo Obregon's NPI (1033732227) is active in the NPPES registry as of the last update on 2024-11-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.