Stefan Cadag, D.O.
NPI 1841408721 · Endocrinology, Diabetes & Metabolism Physician · Seal Beach, CA
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stefan Cadag, D.O. is a Endocrinology, Diabetes & Metabolism Physician provider in Seal Beach, CA (NPI 1841408721).
Provider details
- NPI number
- 1841408721
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A14859 (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
19 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
464 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 | 260 | $138 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 48 | $179 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 44 | $36 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 40 | $193 |
| Hemoglobin A1c Level83036 | 36 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Semaglutidebrand: Ozempic | 659 | 152 |
| Metformin Hcl | 512 | 156 |
| Metformin Hclbrand: Metformin Hcl Er | 443 | 153 |
| Levothyroxine Sodium | 429 | 136 |
| Atorvastatin Calcium | 304 | 106 |
| Alendronate Sodium | 292 | 103 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,426 across 58 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
- 2007-05-21
- Last updated
- 2026-02-23
- Certified
- 2026-02-23
Frequently asked questions
- What is Stefan Cadag's NPI number?
- Stefan Cadag's National Provider Identifier (NPI) is 1841408721, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stefan Cadag's specialty?
- Stefan Cadag is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Stefan Cadag located?
- Stefan Cadag's practice location on file with NPPES is 1198 Pacific Coast Hwy Ste 1, Seal Beach, CA 90740-6251.
- What is Stefan Cadag's phone number?
- The practice phone number listed in the NPPES registry for Stefan Cadag is (562) 799-7071.
- Does Stefan Cadag accept Medicare?
- Stefan Cadag is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stefan Cadag's NPI active?
- Yes — Stefan Cadag's NPI (1841408721) is active in the NPPES registry as of the last update on 2026-02-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.