Nicholas Ashenburg, MD
NPI 1104238336 · Emergency Medicine Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Ashenburg, MD is a Emergency Medicine Physician provider in Stanford, CA (NPI 1104238336).
Provider details
- NPI number
- 1104238336
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 39364 (SC)
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 tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
329 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 | 184 | $187 |
| Critical Care, First 30-74 Minutes99291 | 63 | $233 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 32 | $129 |
| Ultrasound of Heart, Follow-Up93308 | 22 | $28 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 17 | $195 |
| Ultrasound Scan of Chest76604 | 11 | $29 |
Practice location
Mailing address
Additional practice locations (1)
- 900 Welch Rd Ste 350Palo Alto, CA 94304Phone: (650) 723-4000
Registry dates
- Enumerated
- 2014-05-22
- Last updated
- 2024-03-14
- Certified
- 2024-03-14
Frequently asked questions
- What is Nicholas Ashenburg's NPI number?
- Nicholas Ashenburg's National Provider Identifier (NPI) is 1104238336, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Ashenburg's specialty?
- Nicholas Ashenburg is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Ashenburg located?
- Nicholas Ashenburg's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Nicholas Ashenburg's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Ashenburg is (650) 723-4000.
- Does Nicholas Ashenburg accept Medicare?
- Nicholas Ashenburg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Ashenburg's NPI active?
- Yes — Nicholas Ashenburg's NPI (1104238336) is active in the NPPES registry as of the last update on 2024-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.