Doctor profile · Federal record
Dr. Nicholas Ashenburg, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · Emergency Medicine Physician · Stanford, CA
- NPI 1104238336
- Accepts Medicare
- MIPS 75.5 / 100 · 2023
- 12 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
300 Pasteur Dr
Stanford, CA 943052200
(650) 723-4000 - Additional location
-
900 Welch RD Ste 350
Palo Alto, CA 94304
Credentials & registration
- NPI registered
- May 2014 — 12 yrs on file
- Profile last updated
- March 14, 2024
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State licenses (2)
- California #A155400 · South Carolina #39364
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104238336. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
367
Distinct HCPCS
7
Medicare allowed
$59,534
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 179 | 177 | $193 | |
99284 |
Emergency department visit with moderate level of medical decision making | 86 | 86 | $133 | |
99291 |
Critical care, first 30-74 minutes | 32 | 32 | $240 | |
99283 |
Emergency department visit with low level of medical decision making | 23 | 23 | $79 | |
93308 |
Ultrasound of heart, follow-up | 18 | 18 | $29 | |
99238 |
Hospital discharge day management, 30 minutes or less | 15 | 15 | $95 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 14 | $149 |
In context: peer comparison
Among 60 peers in Stanford Emergency Medicine Physician, average services per provider: 60. This provider delivers 6.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Nicholas Ashenburg's medical specialty?
Dr. Nicholas Ashenburg practices Emergency Medicine Physician in Stanford, CA.
Where does Dr. Nicholas Ashenburg practice?
Dr. Nicholas Ashenburg practices at 300 Pasteur Dr, Stanford, CA 943052200. Office phone: 6507234000.
What is Dr. Nicholas Ashenburg's NPI?
Dr. Nicholas Ashenburg's National Provider Identifier (NPI) is 1104238336, issued by NPPES.
Does Dr. Nicholas Ashenburg accept Medicare assignment?
Yes. Dr. Nicholas Ashenburg accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nicholas Ashenburg commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.