John Orrego, MD
NPI 1891822839 · Endocrinology, Diabetes & Metabolism Physician · Denver, CO
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Orrego, MD is a Endocrinology, Diabetes & Metabolism Physician provider in Denver, CO (NPI 1891822839).
Provider details
- NPI number
- 1891822839
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 41916 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 472 | 144 |
| Methimazole | 235 | 77 |
| Teriparatidebrand: Forteo | 231 | 34 |
| Semaglutidebrand: Ozempic | 155 | 25 |
| Insulin Glargine-Yfgn | 140 | 48 |
| Testosterone | 118 | 27 |
| Pen Needle, Diabeticbrand: Ultra-Fine Short Pen Needle |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2021-06-14
- Certified
- 2021-06-14
Frequently asked questions
- What is John Orrego's NPI number?
- John Orrego's National Provider Identifier (NPI) is 1891822839, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Orrego's specialty?
- John Orrego is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is John Orrego located?
- John Orrego's practice location on file with NPPES is 1375 E 20th Ave, Denver, CO 80205-5422.
- What is John Orrego's phone number?
- The practice phone number listed in the NPPES registry for John Orrego is (303) 338-4545.
- Does John Orrego accept Medicare?
- John Orrego is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Orrego's NPI active?
- Yes — John Orrego's NPI (1891822839) is active in the NPPES registry as of the last update on 2021-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.