Susan Marks, MD
NPI 1801835079 · Diagnostic Radiology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Susan Marks, MD is a Diagnostic Radiology Physician provider in San Francisco, CA (NPI 1801835079).
Provider details
- NPI number
- 1801835079
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G48429 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,990 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) |
|---|---|---|
| Screening Mammography77067 | 520 | $43 |
| Screening 3d Breast Mammography77063 | 512 | $33 |
| Screening Mammography77067 | 137 | $159 |
| Screening 3d Breast Mammography77063 | 116 | $52 |
| Diagnostic Mammography of 1 Breast77065 | 98 | $45 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 93 |
Practice location
Mailing address
Additional practice locations (2)
- 2500 Grant RdMountain View, CA 94040-4302Phone: (650) 940-7050
- 101 S San Mateo DrSuite 201San Mateo, CA 94401-3819Phone: (650) 343-1655Fax: (650) 343-1686
Registry dates
- Enumerated
- 2006-06-05
- Last updated
- 2019-08-31
Frequently asked questions
- What is Susan Marks's NPI number?
- Susan Marks's National Provider Identifier (NPI) is 1801835079, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Susan Marks's specialty?
- Susan Marks is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Susan Marks located?
- Susan Marks's practice location on file with NPPES is 1520 Stockton St, San Francisco, CA 94133.
- What is Susan Marks's phone number?
- The practice phone number listed in the NPPES registry for Susan Marks is (415) 391-9686.
- Does Susan Marks accept Medicare?
- Susan Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Susan Marks's NPI active?
- Yes — Susan Marks's NPI (1801835079) is active in the NPPES registry as of the last update on 2019-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.