Doctor profile · Federal record
Dr. Mark Stein, M.D.
Diagnostic Radiology Physician (CMS: Diagnostic Radiology) · Body Imaging Physician · Diagnostic Ultrasound Physician · Santa Ana, CA
- NPI 1265478564
- Accepts Medicare
- MIPS 86.3 / 100 · 2023
- 48 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1100 N Tustin Ave, Bldg. A
Santa Ana, CA 927053509
(714) 835-6055
fax (714) 285-9084
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- June 16, 2015
- Year of graduation
- 1978 — 48 yrs since
- Specialty taxonomy
- 2085R0202X — NUCC code
- State license (1)
- California #A38805
- Medicaid
- CA #00A388050
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1265478564. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
4,746
Distinct HCPCS
10
Medicare allowed
$176,457
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
Q9967 |
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 4,087 | 49 | $0 | |
71250 |
Ct scan of chest without contrast | 108 | 105 | $157 | |
71250 |
Ct scan of chest without contrast | 97 | 95 | $55 | |
71260 |
Ct scan of chest with contrast | 73 | 69 | $58 | |
A9552 |
Fluorodeoxyglucose f-18 fdg, diagnostic, per study dose, up to 45 millicuries | 61 | 56 | $360 | |
71045 |
X-ray of chest, 1 view | 58 | 50 | $9 | |
78815 |
Nuclear medicine study from skull base to mid-thigh with ct scan | 54 | 50 | $1,873 | |
71046 |
X-ray of chest, 2 views | 53 | 52 | $35 | |
73721 |
Mri scan of leg joint without contrast | 29 | 27 | $221 | |
71260 |
Ct scan of chest with contrast | 28 | 27 | $188 |
In context: peer comparison
Among 8 peers in this city , average services per provider: 303. This provider delivers 16× the peer median.Frequently asked questions
What is Dr. Mark Stein's medical specialty?
Dr. Mark Stein practices Diagnostic Radiology Physician in Santa Ana, CA.
Where does Dr. Mark Stein practice?
Dr. Mark Stein practices at 1100 N Tustin Ave, Santa Ana, CA 927053509. Office phone: 7148356055.
What is Dr. Mark Stein's NPI?
Dr. Mark Stein's National Provider Identifier (NPI) is 1265478564, issued by NPPES.
Does Dr. Mark Stein accept Medicare assignment?
Yes. Dr. Mark Stein accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Stein commonly perform?
Top Medicare-reported procedures in 2023: Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (HCPCS Q9967); Ct scan of chest without contrast (HCPCS 71250); Ct scan of chest without contrast (HCPCS 71250). Source: CMS Medicare Physician & Other Practitioners file.