Robert Matz, M.D.
NPI 1558503086 · Hospitalist Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Matz, M.D. is a Hospitalist Physician provider in San Francisco, CA (NPI 1558503086).
Provider details
- NPI number
- 1558503086
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A117078 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
17 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
1,117 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 504 | $129 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 252 | $127 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 180 | $87 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 120 | $188 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 61 | $55 |
Typical Medicare-allowed amounts for these services range $55–$188 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 81 | 79 |
| Pantoprazole Sodium | 41 | 37 |
| Atorvastatin Calcium | 39 | 29 |
| Furosemide | 38 | 37 |
| Prednisone | 31 | 30 |
| Metoprolol Succinate | 22 | 16 |
| Quetiapine Fumarate |
Practice location
Mailing address
Additional practice locations (1)
- 1155 Mill StReno, NV 89502-1576Phone: (775) 982-7878Fax: (775) 982-4196
Registry dates
- Enumerated
- 2009-03-30
- Last updated
- 2018-09-17
Frequently asked questions
- What is Robert Matz's NPI number?
- Robert Matz's National Provider Identifier (NPI) is 1558503086, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Matz's specialty?
- Robert Matz is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Matz located?
- Robert Matz's practice location on file with NPPES is 900 Hyde St Rm 410, San Francisco, CA 94109-4806.
- What is Robert Matz's phone number?
- The practice phone number listed in the NPPES registry for Robert Matz is (415) 353-6817.
- Does Robert Matz accept Medicare?
- Robert Matz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Matz's NPI active?
- Yes — Robert Matz's NPI (1558503086) is active in the NPPES registry as of the last update on 2018-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.