Doctor profile · Federal record
Dr. William Demartini, M.D.
Diagnostic Radiology Physician (CMS: Diagnostic Radiology) · Greenbrae, CA
- NPI 1427091016
- Accepts Medicare
- MIPS 84.4 / 100 · 2023
- 53 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
250 Bon Air RD
Greenbrae, CA 949041702
(415) 925-7301 - Mailing address
-
Po Box 6102
Novato, CA 949486102
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- April 26, 2010
- Year of graduation
- 1973 — 53 yrs since
- Specialty taxonomy
- 2085R0202X — NUCC code
- State license (1)
- California #G27905
- Medicaid
- CA #00G279050
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1427091016. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,655
Distinct HCPCS
10
Medicare allowed
$83,834
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
77063 |
Screening 3d breast mammography | 294 | 294 | $30 | |
77067 |
Screening mammography | 294 | 294 | $38 | |
71045 |
X-ray of chest, 1 view | 209 | 184 | $9 | |
77080 |
Dxa bone density measurement of hip, pelvis, spine | 181 | 181 | $10 | |
71046 |
X-ray of chest, 2 views | 116 | 111 | $11 | |
73502 |
X-ray of hip, 2-3 views | 106 | 91 | $11 | |
70450 |
Ct scan head or brain without contrast | 103 | 95 | $42 | |
74177 |
Ct scan of abdomen and pelvis with contrast | 90 | 82 | $91 | |
73030 |
X-ray of shoulder, minimum of 2 views | 81 | 73 | $10 | |
73560 |
X-ray of knee, 1-2 views | 74 | 63 | $9 |
In context: peer comparison
Among 4 peers in Greenbrae Diagnostic Radiology Physician, average services per provider: 142. This provider delivers 19× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. William Demartini's medical specialty?
Dr. William Demartini practices Diagnostic Radiology Physician in Greenbrae, CA.
Where does Dr. William Demartini practice?
Dr. William Demartini practices at 250 Bon Air RD, Greenbrae, CA 949041702. Office phone: 4159257301.
What is Dr. William Demartini's NPI?
Dr. William Demartini's National Provider Identifier (NPI) is 1427091016, issued by NPPES.
Does Dr. William Demartini accept Medicare assignment?
Yes. Dr. William Demartini accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Demartini commonly perform?
Top Medicare-reported procedures in 2023: Screening 3d breast mammography (HCPCS 77063); Screening mammography (HCPCS 77067); X-ray of chest, 1 view (HCPCS 71045). Source: CMS Medicare Physician & Other Practitioners file.