Aaron Abrahamsen, M.D.
NPI 1427204023 · Emergency Medicine Physician · Chula Vista, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Aaron Abrahamsen, M.D. is a Emergency Medicine Physician provider in Chula Vista, CA (NPI 1427204023).
Provider details
- NPI number
- 1427204023
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- AC3890313M001 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
496 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 257 | $182 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 174 | $9 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 33 | $125 |
| Critical Care, First 30-74 Minutes99291 | 32 | $223 |
Typical Medicare-allowed amounts for these services range $9–$223 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 48 | 48 |
| Ondansetronbrand: Ondansetron Odt | 43 | 43 |
| Hydralazine Hcl | 29 | 29 |
| Cefuroxime Axetilbrand: Cefuroxime | 28 | 28 |
| Gabapentin | 20 | 19 |
| Naproxen | 19 | 18 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 19 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-14
- Last updated
- 2010-02-02
Frequently asked questions
- What is Aaron Abrahamsen's NPI number?
- Aaron Abrahamsen's National Provider Identifier (NPI) is 1427204023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Aaron Abrahamsen's specialty?
- Aaron Abrahamsen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Abrahamsen located?
- Aaron Abrahamsen's practice location on file with NPPES is 751 Medical Center Ct, Chula Vista, CA 91911-6617.
- What is Aaron Abrahamsen's phone number?
- The practice phone number listed in the NPPES registry for Aaron Abrahamsen is (619) 502-5825.
- Does Aaron Abrahamsen accept Medicare?
- Aaron Abrahamsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Aaron Abrahamsen's NPI active?
- Yes — Aaron Abrahamsen's NPI (1427204023) is active in the NPPES registry as of the last update on 2010-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.